Get in touch with QJKH Company
CE + IEC + ISO Certifications
OEM & Custom Safety Sensors
OEM & Custom Safety Sensors — Factory Direct from QJKH China
QJKH — CCH Shanghai Sensing Intelligence TechnologyThe factory-direct partner for customized safety sensors. Safety light curtains to laser scanners and LiDAR—all from one manufacturer with full OEM capability and worldwide delivery. QJKH is a direct manufacturer. QJKH is not a trading company or rebadged distributor. QJKH manufactures all five integrated safety sensor product lines at one location in Hangzhou. This provides importers, OEM integrators and private-label brands a single point of accountability for certified parts, common QC and uniform lead times over complete safety system bill of materials.
Request Free Sample Kit01 // EQUIPMENT
02 // SCHEMATIC
20+ Years
Core Team Experience
5 Product Lines
Integrated Portfolio
OEM & ODM
Custom Capability
Global
Shipping & Incoterms
Why Choose QJKH as Your Safety Sensor OEM Partner
Various suppliers sourcing from various suppliers forcing importers and re-distributors to deal with different quality bands, incompatible certifications, extended procurement channels and a communication nightmare taking into account the international time difference. Buyers end up with operating incompatibility between a safety light curtain supplied by one brand and a safety relay or safety switches from another — and when the incident occurs in the field, liability is shifted from one brand to another while workplace injury risk rises and end users suffer.
Industrial safety sensors — light curtains, magnetic safety switches, safety relays, safety scanners — exist to protect personnel and prevent injury inside hazardous working environments. The machine guarding responsibility sits squarely with the equipment operator, and the importer shoulders certification accountability for every unit sold. This is why consolidated sourcing decisions and consistent safety measures matter more in this product category than in almost any other B2B hardware segment.
For an industrial importer developing a private-label portfolio, or an OEM integrator defining safety components into a custom machine, the supplier-count issue becomes a multiplier with each sale. More suppliers necessitate more POs, more QC audits, additional shipping routes, additional warranty channels, and a larger pool of technical contacts to qualify. Every new vendor reduces negotiating position and dilutes accountability. When something fails- and in a regulated category something regularly does- the expense of teasing apart which vendor’s offering was at fault frequently surpasses the margin the diversification was meant to preserve.
Each Cost of Getting Sourcing Wrong
Shipment Delay Cascade
One tardy supplier of safety system components—delays the entire system delivery. The light curtain leaves for the end customer on time, but the matching safety relay remains bottled-up in customs. That integrator’s machine build is temporarily tabled for three weeks, awaiting one module and missing the contractually agreed delivery date by weeks.
Certification Mismatch
There is a difference of one supplier to another with the product certification level – one rated for CE and IEC 61496-1, the other only has generic EMC label. When the integrator submits the total machine for type-examination in the European Union, this gap of documentation causes full re-test cycle to be executed at the integrator’s cost.
Quality Drift Between Orders
The 1st order passes incoming QC and shipped for use in the field. One 2nd order – from the same supplier – exhibits significant aspects of optical misalignment and false-triggers at the receiver. The distributor not revealed change of upstream source and reputations of the reseller would be impact by the fail components they didn’t make.
Support Fragmentation
When an end user indicates a fault from the light curtain, the faultee turns to the light curtain brand who blames the safety relay supplier, who blames the control system integrator. Technical ping-pong ensues for days on end whilst the production line remains down. If one manufacturer is responsible for all safety components, then accountability is consolidated.
QJKH’s Consolidated Sourcing Proposition
Our manufacturer model was designed to solve these pain points at an architectural level. Five safety sensor product lines – safety light curtain families, safety laser scanners, safety relays, 2D/3D LiDAR sensors, and solid-state LiDAR – are designed, assembled, tested, and shipped from our Hangzhou facility. Sub-assembly suppliers are qualified once under ISO 9001 disciplines. QC gates are the same across product lines. Certification documentation have a uniform format. And everything an importer purchase from us have one engineering team, one quality record system, and one commercial contact.
Our core engineering and manufacturing team focused on building this type of industrial safety sensor for over 20 years – our Hangzhou factory supports importers across the EU, North America, Southeast Asia, Russia & CIS, and the Middle East. Dedicating so much time to it is not just a marketing claim; it has an impact on our performance that matter to OEM projects: familiarity with IEC 61496 architecture options, practical perspective on which spec features actually improve operator safety and which are just extra cost, and a test lab set up to reproduce the failure modes that inexperienced factories won’t realize until field returns come in.
Key Buyer Types We Serve
Industrial Distributors
shaping private-label circuits – they need stable branding, assured certification paperwork for sales, and a price structure that preserves their own margins.
OEM Integrators
designing safety-integrated equipment – they need sensors fit their exact application environment, firmware parameters set to their control architecture, and mechanical formats that match their machine footprint.
Safety system engineers
identifying components for custom cells – they want PL/SEL ratings consistent with their risk analysis, reliable datasheets, and engineering support on the architecture rather than after purchase is complete.
Automation Resellers
demanding certifiable inventory – with up-to-date certificates, predictable re-stocking schedules, and a supplier comfortable with emergency needs being a part of ongoing supply relationships.
What all four customer types share is risk mitigation. A safety light curtain isn’t an impulse buy – it is a legally regulated device that will fall inbetween a potential hazard and somebody in front of it. Buyers with this product in mind do not treat supplier choice as something decided weekly, which is exactly what we plan on providing from first sample to multi-year operations contract.
Complete Machine Safety Sensor Portfolio — OEM & Custom Options
QJKH offers five different product families to serve all the diverse safety needs seen in industrial automation – from bandme.belt guarding and safety isolators to mobile robot safety, magnetic safety locks, and logic circuits that help operators get home safe. Each product family complements the others; customers can get a full set of inter-connected safety components from a single source, and rest assured all the electrical, mechanical, and certification language is consistent.
Solid-State LiDAR for Harsh Environments
Latest generation of our LiDAR, devoid of any moving mechanical assembly, designed for application conditions where vibration, shock, and thermal extremes would dramatically reduce the lifetime of the moving assembly of a mechanical scanner. Each solid-state implementation affords smaller form factors with reduced power consumption, suitable for battery-powered mobile platforms and outdoor installations.
- Mechanism: No moving parts
- Vibration: High resistance
- Temperature: -40°C to +60°C operating
- Form factor: Compact
- Power: Low consumption
- Output: High-density point cloud
Applications
Outdoor AGV fleet subject to environment and rough terrain, mobile construction equipment with persistent mechanical shock loading, agricultural robotic platforms undergoing temperature extremes, and bumpy industrial environment – mining, heavy manufacturing, outdoor warehousing – where the service life of mechanical LiDARs is limited by roller bearing wear and seal degradation.
Area-Monitoring Safety Laser Scanner
2D Programmable protective and warning fields. Time of flight scanner. To replace mechanical guarding where the work envelope varies, or a fixed light curtain cannot cover irregular footprints. Different sets of zone sets enable the scanner to change the protection profile according the machine state on AGV/AMR, i.e. vehicle reconfigure protection fields and coverage specified by direction and velocity.
- Scan angle: 270°–300° configurable
- Range: 5m–30m configurable
- Rating: PLd/SIL2 per ISO 13849-1
- Protection: IP67
- Zones: Multiple zone sets, switched inputs
- Outputs: OSSD + Ethernet/fieldbus options
Applications
AGV and AMR collision avoidance, stationary area detection around press cells and palletizers, robot cell floor-level safety where overhead light curtain solutions are impractical, depalletizer risk reduction, and automated warehouse aisle access detection. Firmware flexibility to include vehicle-specific integration where OEM mobile platform builders require the scanner to interface with their own fleet management system.
Safety Relay & Interlock Module
The contact interface between sensors and the machine control offering certified contact architecture which converts OSSD sensor signals into safe switching of power circuits. Force-guided contact architecture detects a welding of contact on the next actuation cycle and preventing the classical failure mode where a sensor accurately detects a hazard but the downstream contactor fails to open.
- Architecture: Dual-channel input
- Contacts: Force-guided
- Compliance: EN 60204-1
- Mounting: DIN rail
- Diagnostics: LED per channel
- Delay: Configurable output delay
- Supply: 24VDC, PLe/SIL3 capable
Applications
Multiple E-Stop through an extractions, safety interlocking system through a guard door, two-hand control system hooked up with a press and monitored via end stop chain passed through a broad machine-s boundary. An unsatisfactory safety light curtain without certified safety relay would not have been a single PLe circuit, the safety relay is the missing link providing the fault-detection structure in ISO 13849-1.
2D & 3D LiDAR for Navigation & Perception
It is not safety rated. For navigation, mapping, and perception is targeted as the additional function of the safety scanner to perform within the regulatory framework. A 2D version is implemented as a planar point cloud for SLAM or reflector based navigation. The 3D version delivers a volume of data for obstacle classification or multi-layer environment of a mobile platform.
- Range: 2D up to 30m, 3D configurable
- Scan: 360° horizontal
- Output: Point cloud, Ethernet/CAN
- Protection: IP65 / IP67 variants
- Navigation: SLAM-compatible firmware
- Modes: Reflector navigation, free navigation
Applications
AGV and AMR navigation, obstacle detection and collision avoidance technologies incorporated underneath a safety rated scanner, indoor mapping and localization systems for warehouse operation, outdoor harvesting AGV with reflector landmark based positioning, material handling devices equipped with perception stacks. OEM customization involves tuning firmware parameters for navigation algorithm implementation, pre-processing point cloud data according to the downstream perception software requirements.
Type 2 & Type 4 ESPE Light Curtain Family
Our largest product family for machine safety safety: functions from press brake point-of-application to robot cell perimeter guarding. Type 2 provides a risk reduction measure for low risk applications by the periodic self-test architecture; Type 4 provides the highest level of performance via a redundant channel architecture with continuous cross-monitoring. Parallel arrays of infrared light beams form a non-contact safety barrier around the hazard zone – any object entering the array causes the system to output the safety signal within the specified response time. Receiver/Emitter pairs are pre-matched in the factory for optical synchronization. Simple M12 field-wiring allows field replacement without the need for soldering or custom harnesses. Manual / automatic restart modes are selectable to suit application needs.
- Classification: Type 2 (PLc/SIL1) & Type 4 (PLe/SIL3) per IEC 61496-1/2
- Resolution options: 14mm finger / 30mm hand / 50mm body
- Protective height: 100–2,000mm in 150mm increments
- Connector: M12 5-pin
- Housing: Aluminum IP65
- Cascade: Chain up to 3 units
- Functions: Built-in blanking, muting, EDM
Applications
A press brake functions protected (14mm finger resolution is necessary at close approach speeds), robot cell entrance monitored (30mm hand resolution corresponds to the reach envelope limits), conveyor feeders (body resolution for walk-in entrance), the operator entrances into packaging machinery and stamping press protection. This point of operation for a hydraulic press is guarded with a 14mm-resolution Type 4 light curtain that interrupts power and lowers the ram whenever finger entry occurs within the stopping distance as calculated in the work of ISO 13855.
| Category | Safety Rating | Detection Range | Field of View | Interface | IP Rating |
|---|---|---|---|---|---|
| Safety Light Curtain | Type 2 PLc / Type 4 PLe | Protective height 100–2,000mm | Linear beam array | OSSD, M12 5-pin | IP65 |
| Safety Laser Scanner | PLd / SIL2 | 5m–30m configurable | 270°–300° | OSSD + Ethernet/fieldbus | IP67 |
| Safety Relay Module | PLe / SIL3 capable | Control circuit (N/A) | Control circuit (N/A) | DIN rail, 24VDC | IP20 (cabinet) |
| LiDAR Sensor (2D/3D) | Non-safety rated | Up to 30m (2D) | 360° | Ethernet / CAN | IP65 / IP67 |
| Solid-State LiDAR | Non-safety rated | Configurable | Wide-angle | Ethernet | IP67 |
The table below aligns common application scenarios with recommended product mixes. These are to be used as a talking point – the final configuration is a function of the formal risk analysis, necessary stopping distances, and the regulatory environment in the intended geographic market.
| Industry | Primary Need | Recommended Combination | Typical Configuration |
|---|---|---|---|
| Automotive Assembly | Press brake + robot cell safety | Safety Light Curtain Type 4 (14mm) + Safety Relay | Finger resolution, cascade chain, muting for material feed |
| Warehouse / Logistics | AGV fleet safety + navigation | Safety Laser Scanner + LiDAR Sensor | 300° scanner + 2D SLAM LiDAR + Safety Relay |
| Food & Beverage | Conveyor + packaging access | Safety Light Curtain Type 2 (30mm) + Safety Relay | Hand resolution, IP65 for washdown areas |
| Electronics Manufacturing | Robot cell perimeter + precision assembly | Safety Light Curtain Type 4 + Laser Scanner | Cascade connection for multi-side coverage |
| Pharmaceutical | Cleanroom packaging access | Safety Light Curtain Type 2 + Safety Relay | IP65, smooth aluminum housing for cleaning |
| Heavy Machinery | Press / stamping point-of-operation | Safety Light Curtain Type 4 (14mm) + Safety Relay + Laser Scanner (perimeter) | Layered protection: curtain at POO, scanner at cell boundary |
LiDAR Navigation Integration
For system integrators developing a hybrid LiDAR plus safety scanner architecture on their mobile platforms, three configurations are common. Dedicated SLAM navigation leverages the 2D LiDAR to generate and localize against a map within the operational environment – low hassle to deploy but highly susceptible to environmental change. Reflector-based navigation uses repositionable beam-tracking landmarks embedded in the facility environment with the LiDAR providing accurate triangulation of position – higher fixed infrastructure cost but highly reliable. Mixed mode integrates SLAM for transient localization with reflector landmarks installed at the PA target points – a common solution for AMR fleets seeking precise pallet capturing alignment with much lower infrastructure than reflector-based systems. That safety laser scanner is aligned with the navigation LiDAR as an independent safety barrier to monitor predefined areas and initiate safe stop procedures sans the navigation stack.
Not sure which combination matches your application?
→ Get OEM Technical ConsultationQJKH vs Off-the-Shelf Distributors — The OEM Advantage
When OEMs and OEM integrators select safety sensor options, the decision often comes down to convenience of distributor sourcing versus direct-from factory pricing. Each solution has associated trade-offs, and the optimal choice depends on your forecasted installation volume, desired customization path, and future product category plan.
Standard Route
Distributor / Reseller
- Customization depth: Fixed catalog SKUs only — take the model as-is.
- Unit pricing at 100+ units: 30–50% markup (multiple margin layers).
- MOQ flexibility: Typically 1-unit retail pricing, bulk discounts at 100+.
- Lead time (standard): Immediate if in stock, 8–12 weeks if backorder.
- Lead time (custom): Not typically available.
- Private labeling: Manufacturer brand only.
- Certification support: Certificates as-provided, no market-specific support.
- Technical support: Through distributor (adds 1–3 day response delay).
- Ongoing partnership: Transactional — each order is independent.
Recommended for Scale
QJKH OEM Factory
- Customization depth: Full OEM: housing color/material, label/branding, firmware parameters, connector types, cable lengths, optical specifications.
- Unit pricing at 100+ units: Factory-direct cost structure.
- MOQ flexibility: 10 sample units (evaluation), 50–100 for small batches, 1,000+ for production orders.
- Lead time (standard): 2–4 weeks from order confirmation.
- Lead time (custom): 4–8 weeks including design + prototyping.
- Private labeling: Available: your brand on housing, documentation, packaging.
- Certification support: Direct documentation + help adapting to target market (UL for US, CE for EU, GOST for Russia).
- Technical support: Direct engineering team, same-timezone communication during your business hours available.
- Ongoing partnership: Product roadmap input, priority allocation during shortages, co-development on new products.
When a Distributor Makes Sense
A local distributor is typically the most cost-effective source for one-off time-sensitive needs, extremely low volume applications, retail sales channels where customers require immediate service, and end-uses where end-users prefer local warranty servicing over lower unit price. If you need a single Type 4 photoeye for a retrofit next month, going to a stocking distributor saves you weeks versus exploring factory-direct options. Distributors recover their margin from inventory carrying, local stock keeping, on-the-ground customer support – those are valuable services you pay for in certain use cases.
When the OEM Factory Model Wins
Recurring volume is the strongest indication that factory direct source will work for you. If you are designing a private-label catalog, scheduling a machine to build each component into a weekly shipment, or competing in a channel where price advantage defines your market, the distributor mark-up becomes a long-term cost drag. Custom specs are the second most significant factor: distributor cataloging covers perhaps 10-20% of what a specific machine application might require, and when it is time to specify a non-standard cable length, special-mounting kit, or firmware parameter for your PLC, the most expedient course is to direct the customer back to the manufacturer anyhow. Factory-partnered cost engineering at the BOM level simply is not available behind a reseller.
The Hybrid Model
Serious importer partners run a hybrid sourcing model: the bulk and custom private-label purchase orders delivered directly to the factory, as well as stocking distributor connectors for backup, initial trials, and spare parts wherever local delivery is inevitable. This model offers the advantages of OEM customization and independent sourcing without sacrificing the last-mile product-reaction that distributors can offer. Our sales team is quite comfortable working with buyers using this approach – indeed, we often help associates stock our products in distributor inventories when the end-market demand is strong enough to sustain it.
Common Misconceptions About Direct-from-China Sourcing
Three common myths emerge in early conversations with new buyers. One is that true factory-direct purchase necessarily involves quality risk – however, this risk is related to whether a buying organization is placing orders with some trading company that has no manufacturing responsibility, or with a direct manufacturer that owns the production line. Another misunderstanding is that OEM customization entails inherently high costs – well-established product platforms tend to allow a great deal of modification within existing fixtures and firmware architectures, and not a total design overhaul. One third myth concerns the misconception that direct factory purchasing always involves a significant logistics management challenge – our DDP Incoterms and capable freight partners help you receive product at the doorstep of your warehouse with customs duties paid already and nothing more than a typical domestic purchase order to handle.
TCO Perspective
Over a multi-year partnership, the cumulative difference between distributor-markup pricing and factory-direct sourcing typically funds significant portions of product development, marketing, or inventory expansion for the buyer. Importers report that the ROI on establishing a direct manufacturer relationship becomes evident within 6–18 months of regular purchasing cadence — the first-order investment in qualification and sample evaluation amortizes quickly once production volume begins.
Want to see how factory-direct pricing compares for your volume?
→ Request Custom QuotationSafety Sensor OEM Process: From Concept to Delivery
Every productive OEM relationship proceeds through a clear development pathway. has honed this process through a defined step-by-step process involving hundreds of projects, achieving the conformance and approval levels that escape many companies working with a new contract manufacturer. The five phases are as follows – established OEMs with repeat orders are able to exclude or compress the earlier steps on this list based on what numbers have already been finalized.
Requirements Gathering & Technical Review
Week 1 · Deliverable: Full project specification
- Initial consultation call with dedicated project engineer
- Review of your application drawings, environmental conditions, compliance targets
- Discussion of target unit cost and volume projections
- Work with qualification by end-market (CE for EU, UL for North America, KC for Korea, etc.)
Output: Written technical specification with mutually agreed acceptance criteria
Design Review & Feasibility
Week 2–3 · Deliverable: Design package with cost/timeline confirmation
Once requirements are understood, our engineering team reviews our existing product platform for feasibility. This goal of this step is to find the minimal effort path from your spec to certified manufacturable product – by default reusing tested sub-components unless design specifically benefits from new engineering. We identify spec requirements that increase cost or timeline and suggest alterations where possible. During the cost review step, our buyers work with suppliers to implement specs that deliver lower total landed cost.
- Engineering team evaluates spec against existing platforms
- Discover reused sub-components where they meet the spec (low risk low cost)
- Indicate spec requirements that increases cost or timeline
- Cost review step: which specs can flex without affecting the application?
Output: BOM, mechanical drawings, firmware requirements, final quote
Prototyping & Sample Validation
Week 3–5 · Deliverable: 3–10 working prototype units
Prototypes are produced with soft tooling for small batches. Once the design is finalized and volume justifies the expense, hard tooling is established. Firmware customization may proceed in conjunction with mechanical prototyping. Each prototype unit is tested against your spec at our facility prior to shipment. 3-10 units are shipped for in-application testing to reveal integration issues unknown to bench test. One cycle of feedback based revisions typically ensues, and the final samples are the reference units for production.
- Prototype tooling (soft for small quantities, hard tooling committed during production stage)
- Firmware customization if required
- Functional testing to spec at our facility
- Shipping 3–10 sample units to you for in-application validation
- Cycle of revision: typically 1 revision cycle based upon your testing feedback
Output: Approved sample + signed-off specification for production
Production Manufacturing
Week 5–9 (quantity-dependent) · Deliverable: Full production batch per approved spec
Production starts with procurement of components from our vetted suppliers. Each vendor maintains current quality documentation and has been audited in the past. Our five-stage inline QC process runs concurrently with assembly: incoming inspection, subassembly test (verifies PCBs and optical alignment), full-assembly functional test, burn-in aging, functional verification. Certification testing batches are provided to accredited labs as necessary. Product labeling and packaging is in line with your instructions (retail pack, bulk pack, private label, etc.)
- Component procurement from qualified supplier base
- Five-stage inline QC (incoming inspection, sub-assembly test, full assembly, burn-in aging, final functional test)
- Certification testing group provided to accredited lab (CE, UL, TV) as required
- Packaging and labeling to customer specification (retail pack, bulk pack, private label)
Output: Production inventory ready for QC release
Quality Control, Certification Documentation & Shipping
Week 9–10 · Deliverable: Shipped units + complete documentation package
Final inspection is performed according to your order size and acceptance criteria using the corresponding AQL sampling standard. In addition to the test reports and certificate of conformity, the delivery package includes material declarations and user manual, in your target language, that will be shipped along with the product itself. Depending on your preferred Incoterms, the freight is arranged by us to your warehouse (FOB Shanghai if you are experienced importers, CIF port of destination if you prefer us to handle the origin-based logistics to the block of your choose, DDP to your warehouse if your logistics team would like to shift the burden on our side). Once shipped, the relationship transitions to your team for in-field support, supported by documented escalation flow back into our engineering group for factory-level analysis of field issues.
- Final inspection sampling per AQL standards
- Test certificates, certificate of conformity, material declarations, user manual (in your target language)
- Freight arranged according to your Incoterms preference (FOB Shanghai, CIF port of destination, DDP warehouse)
- Post-shipment support handoff to your team
Output: Delivered product + full compliance documentation
Quality Assurance & Safety Certifications
Safety sensing solutions live in a mandated environment. Devices that do not comply with relevant standards are not only illegal but also expose buyers to liabilities for incidents should must prove checks were met. QJKH quality and certification framework is designed for importers to have products as viable components built to the standards for market access.
IEC 61496-1 / IEC 61496-2
Type 2 & Type 4 ESPE Classification
Our foundational standard for electro-sensitive protective equipment. Type 2 devices use periodic self-testing to verify their own integrity at defined intervals, while Type 4 adds redundant automatic cross-checking with immediate fault detection. QJKH safety light curtains are designed and tested against both tiers, with Type 4 variants targeting applications where the risk assessment requires the highest performance level such as press brake point-of-operation protection.
ISO 13849-1
Performance Level (PL) Classification
This standard defines Safety-Related Parts of Control Systems (SRP/CS). QJKH products span PLc (lower-risk applications) through PLe (highest integrity, for dangerous machinery). Each achievable performance level depends on architecture, MTTFd, diagnostic coverage, and resistance to common-cause failure. Product datasheets specify the PL reachable when integrated with appropriately rated safety relays and complementary components.
IEC 61508
Safety Integrity Level (SIL) for Functional Safety
Complementary to ISO 13849 for process industries, IEC 61508 is the generic functional safety standard. QJKH products support SIL1 through SIL3 ratings depending on configuration and integration context. Functional safety certification enables deployment in industries following IEC 61511, the process-industry adaptation, where the safety case is built around demand rates and probability-of-failure-on-demand metrics rather than machine-safety categories.
CE Marking
European Conformity
Mandatory for products placed on the European market. CE coverage spans the EMC Directive (2014/30/EU), the Low Voltage Directive (2014/35/EU), and the Machinery Directive (2006/42/EC) where applicable to the product category. QJKH maintains current CE Declarations of Conformity with supporting test reports from accredited test laboratories, and the documentation package for EU-bound shipments includes the DoC, the test reports, and the instructions necessary for your customer’s technical file.
ISO 9001
Manufacturing Quality System
The factory-level quality management standard. QJKH’s Hangzhou facility operates under ISO 9001-certified processes covering design control, supplier qualification, production control, inspection and testing, non-conformance handling, and continuous improvement. That ISO 9001 framework is what converts individual product certifications into a reliable, repeatable production capability — without it, a single certified batch is not a proxy for consistent ongoing quality.
Internal Testing Process
Each unit of every safety sensor goes through five levels of testing before shipment: AQL sampling in each manufacturing batch as an approval step, with batch records held for the life of the product. Please see the following items for more information on each step:
1
Incoming Materials Inspection
acceptance sampling for optical parts, PCBs, and connecters with the respective supplier lot number tracked against each submission.
2
Sub-Assembly Testing
boarded PCB functional test, as well as optical adjustments, are performed on sub-assemblies before the box reaches final assembly.
3
Full Assembly Functional Test
the full safety sensor is tested to the same test specification as in sub-assembly testing, however, in addition response time and output logic are tested and recorded.
4
Burn-in age
the sensors are exercised at elevated temperature between 24-72 hours, to account for early infant mortality; sensors passing burn-in are cleared for shipment, those failing are subject to root cause analysis.
5
Final verification
previous five programs are now merged into one single AQL inspection step against the shipment approval criteria, with documentation and labeling against the shipment.
Need certification documents for your target market?
Download Compliance Package ➔Frequently Asked Questions
QJKH owns its own factory in Hangzhou with the capability to produce all five product categories in packs of up to 10,000. Our polysilicon bifacial modules are available in 55 cell and 72 cell configurations with up to 400Wp peak output. We have our own PCIe forming machine lines built to our design specifications. Each efficiency path from wafer production to module assembly is fully integrated and traceable. Our competitors tend to focus on one or two categories to increase specialization and manufacturing quality. Because we can handle a total system load rather than just one piece, integrators and importers prefer doing business with us for the economics of scale. Private label importers on mylar rolls and USB cards appreciate the consolidated machinery and safety certifications which come from as few as 4 suppliers producing many lines in the same factory.
QJKH distinguishes between the two by our product structure. Type 2 light curtains employ periodic self-test whereby the device checks its own functionality at a set interval. Should the device malfunction in that interval a potentially dangerous failure may not be immediately recognized. This architecture was provisionally supported by EN 61496-1 in part because it enables a lower cost option for applications with lower risk control requirements. Type 4 light curtains use active cross-channel monitoring with an inductive response time within device limits to preemptively move to a safe state as mechanical stops are reached. This architecture is supported up to Performance Level PLe by IEC 61496-1 and is therefore the appropriate option for higher risk applications, for instance press brake point of operation protection, automated robot work cells at a dangerous machine, or any other safety application where the stopping distance calculation per ISO 13855 leaves no margin for safety in the event of a hazardous failure. A typical cost premium for this type of device is a few dollars per sensor for 2 channels, and perhaps $15 for the additional diagnostics MCU.
Yes. OEM/ODM services would normally be listed on the specification sheet rather than being a hidden feature. We can modify a product specification within the limits of your in-house installation, including: mechanical enclosure (color, appearance, dimensions), branding (packaging, box design, part numbers, product names), firmware (zone configuration, output logic, communication protocol), optical characteristics (resolution, detection zone, range), standard plastic model or high-luminance discontinued special. Our engineering staff can give you insight about which customization steps are design-easy versus cost-prohibitive when discussing a quote upfront, saving you the agony of late-stage bill of materials surprises.
QJKH products are engineered and validated to the base safety standards valid to each product type. For safety light curtains (Type 2 and Type 4 respectively), IEC 61496-1 and IEC 61496-2 are employed; for safety-related parts of the control system (most especially relevant for safety light curtains), ISO 13849-1 standard (with Performance Level ratings of from PLc to PLe); for functional safety (Control system, diagnostic system, manufacturing process etc), IEC 61508 standard (with suitable standard integrity level specification,SIL, of from SIL1 to SIL3 depending on the application config); for European deployment, CE conformity under the Machinery Directive and EMC Directive. We use the CEECEN61000 series testing for EMC compliance. Finally, individual product variants may include additional certifications – we can advise should your product require UL certification (applicable for North American deployment), GOST certification (applicable for Russia), KC certification (applicable for Korea), or other country specific certifications. Certificate documentation and relevant test reports are available in electronic form upon request and are included in the standard documentation pack shipped with every production order.
Minimum order quantity (MOQ) is determined by product and customization level. We have evaluation/sampling quantities available for testing purposes, these quantities are sufficiently high so to provide the OEM with materials for validation before gravitating into mass production. Pilot batches are also available for domestic testing purposes and promotional and fan-out purposes where new products are being launched into a new region. Standard commoditised product general minimum order quantity requirements are significantly lower than fully customised or bespoke product MOQs. We seek to determine MOQ that corresponds to your roll out plan and your expected annual volume requirements rather than arbitrary limitations. Please consult our sales team with your expected volumes and we will suggest an MOQ to suit your needs. Often for new global markets, we suggest that the initial order quantity will be smaller than subsequent orders and payment terms are structured accordingly. Sensible profiles of immediate vs. long term ordering are established in early dialog.
That process from first OEM indications all the way through to final implementation can extend over 5-7 weeks; design discussions and review in the initial 2-3 weeks, sample approvals during the second 2-3 weeks (covering also your time for in-application testing), then manufacturing and finally shipping typically within the 5-7 week period. The commercial design cycle for already developed range of standard products is much shorter than this, a next day order for repeat products (that are identical to prior shipments) can typically be shipped within 3-4 weeks. Customised products may require additional lead time depending on the scope of changes. Our project engineers work with your engineering department to establish credible time schedules that work within your scheduled ramp plan, and will high light criteria that may extend the schedule for your consideration and decision.
Yes- qualified commercial inquiries may qualify for free evaluation samples. This varies by product family, quantity requested, and discussions stage. Usually, after an initial technical conversation determines that our product portfolio is suitable to support the specifics of your application situation, we ship sample units at our cost for simple testing and validation. We ship samples typically via international courier, duties on the buyer’s account, since it is very difficult to provide a blanket duty location for samples from a public web store. Large-volume sample requests, custom variants, or samples that require prototype manufacturing are evaluated on a case-by-case basis, where the cost of the sample can be offset by a future committed production run. You may contact our sales team with application specifics, volume forecasts, and delivery time expectations; the more application context you have researched, the quicker we can formulate a sample package.
We most often support the complete Incoterm range in order to suit diverse buyer situation. CIF- “cost, insurance, freight,” to a specific destination port, is common when the point of origin controls logistics and imports are handled directly by the buyer. DDP- “delivered duty paid” to the buyer’s address reduces buyer handling steps and makes more sense when buyer does not have enough operations capability to manage Chinese origin import complexities. FOB- “free on board” Shanghai Harbor, is the most common when the importer controls freight and custom clearance. Payment options include T/T, L/C at sight or deferred terms, and WU. For first purchases, L/C terms are typical, and as the relationship matures, break into an initial “30% face value, cleared against production,” and balance before shippage” T/T structure balance is possible.
Trending now
