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CCH Sensing Intelligence Hangzhou, China
Industrial Safety Solutions
Industrial Machine Safety Solutions — Complete Light Curtain & Guarding Systems
Factory-direct safety light curtains, safety laser scanners and safety relay modules for press brakes, robot cells and packaging lines. Designed in Hangzhou, tested to IEC 61496, and priced for international distributors and OEM integrators – with free test samples available on inquiry.
- Type Coverage: Type 2 & Type 4
- Resolutions: 14mm / 30mm / 40mm
- Enclosure Rating: IP65 / IP67
- Performance: PL e / SIL CL 3
- Interface: OSSD 24VDC PNP, M12
- Origin: Designed in Hangzhou
20+
Years in Safety Manufacturing
10 pcs
Minimum Order (MOQ)
~15
Days Lead Time
IP65/67
Enclosure Rating
OEM
Ready & Global Shipping
EN · PROC · MGR
Machine Safeguarding: Stop Workplace Injuries Without Sacrificing Throughput
On a busy press brake or a fenced-in robot cell the safety protocol and the production target pull in opposite directions. Mechanical fences keep operators at a distance, and they also exclude tooling changes, pallet loading and inspection walks. Each access cycle costs minutes; each minute is revenue. A safety light curtain answers both demands: it is a presence sensing device made from a matrix of infrared light beams and when a person crosses that invisible boundary the automated machine stops in 15 milliseconds – no door to open, no key to turn, no lost cycle when the potential hazard has gone again.
Three typical pain points come to the surface whenever buyers compare options.
First, fine wire or plastic fiber bunching, coolant fog and vibration cause nuisance trips on lower-grade sensors – “the curtain faults if there are overhanging items or dust on the sensor” says a forum post from a warehouse worker. Second, installation distances get set too close to the hazard, which either violates ISO 13855 or triggers a retrofit months after set up. Third, integration with an existing Allen-Bradley, Siemens or Omron PLC gets held up if the supplier cannot show a working reference design.
CCH Sensing Intelligence has designed the safety light curtains around those three pain points:
IP65 / IP67 enclosures that protect against airborne dust, published ISO 13855 distance recommendations included with every order, and standard OSSD outputs that connect into a Rockwell Guardmaster safety relay or a Siemens F-CPU program without custom firmware. The rest of this page explains how each product series addresses an individual hazardous condition, how Type 2 compares to Type 4 when risk is equal to budget, and what to anticipate in price, lead-time and sample policy before the PO is signed.
EN · PROC
CCH Safety Light Curtain & Light Barriers Lineup — Finger, Hand, and Body Protection
Our four sensor lines match the four minimum working distances that a safety engineer must defend. Each line uses the same OSSD 24 VDC PNP output and the same M12 5-pin connector, so it is possible to select resolutions across a single guard door without having to drill different wiring harnesses back to the controller. Every model ships with alignment lights, manual reset and external device monitoring – the features OEM-supplied for a Type 4 device.
Series CL-14
Finger Protection — 14 mm resolution
For point-of-operation guarding on press brakes, stamping tools and small hazardous area openings that require a finger prompt to trigger the stop. Guard field heights from 150 to 1,200 mm, response time under 15 ms.
Type 4 · PL e · IEC 61496-1/-2
Series CL-30
Hand Protection — 30 mm resolution
The most common resolution across access guarding points and robot cells. Scanning range up to 10 m, support for fixed and floating blanking inside the sensing area.
Type 4 PL e Up to 20 m range
Series CL-40
Arm Protection — 40 mm resolution
Larger openings where arm reach is the hazard: palletizers, cartoners, perimeter cells with manual intervention zones. Supports cascading light curtain arrays on up to four segments without dedicated controllers.
Type 2 or Type 4 variants
Series CL-Grid
Perimeter Guarding — Safety Light Grid
Two-, three-, or four-beam safety light grids used for perimeter guarding around robotic welding cells and enclosed work cells. Ranges up to 60 m, ideal as a perimeter layer around hard guarding with access guarding gates.
Type 4 · PL e · Long-range
Model decision matrix — pick by hazard and access frequency
| Application | Recommended series | Resolution | Scanning range | Typical response time |
|---|---|---|---|---|
| Press brake point-of-operation | CL-14 | 14 mm | 0 – 7 m | < 15 ms |
| Robotic welding cell access | CL-30 | 30 mm | 0 – 10 m | 15 – 20 ms |
| Palletizer / cartoner entry | CL-40 | 40 mm | 0 – 15 m | 20 – 25 ms |
| Perimeter around robot work cell | CL-Grid | 4-beam body | 0 – 60 m | 25 – 30 ms |
| Low-risk assembly bench | CL-30 Type 2 | 30 mm | 0 – 6 m | 18 – 22 ms |
Type 2 vs. Type 4 Safety Light Curtain — How to Pick the Right Safety Level
The split between Type 2 and Type 4 is not a cost debate dressed up as a specification. It is a risk assessment outcome defined by IEC 61496-1 and mapped to ISO 13849-1 performance levels – the difference that determines whether a safety application qualifies for the device at all. A Type 2 device self-monitors on a periodic cycle and is valid up to PL c / SIL CL 1. A Type 4 device runs continuous redundant self-diagnosis and qualifies up to PL e / SIL CL 3.
02
Type 2
Standard Risk
- Self-diagnosis Periodic test, fault detection within one cycle
- Max PL (ISO 13849-1) PL c
- Max SIL (IEC 62061) SIL CL 1
- Category (ISO 13849-1) Category 2
- Appropriate risk class Minor injury, low frequency
- Typical cost position Lower price tier
04
Type 4
High Risk
- Self-diagnosis Continuous redundant, single-fault tolerant
- Max PL (ISO 13849-1) PL e
- Max SIL (IEC 62061) SIL CL 3
- Category (ISO 13849-1) Category 4
- Appropriate risk class Severe injury, high frequency
- Typical cost position Premium tier, justified by risk reduction
The decision path in practice: run the risk assessment per ISO 12100, derive the required PL, then select Type accordingly. If the outcome is PL d or PL e, Type 2 is ruled out regardless of budget. If the outcome is PL c, Type 2 is the economical choice and spending on Type 4 buys only future headroom. This is where a data-driven supplier conversation pays off – we will not recommend Type 4 where a risk assessment concludes Type 2 is adequate, and we will not sign off on Type 2 for a press brake where OSHA and ANSI B11.19 both point to Type 4.
TCO Framework — Light Curtains vs Physical Guards
When buyers compare light curtains against hard guarding, the direct purchase price rarely tells the whole story. Industry discussions of protective guarding ROI consistently point to three dimensions where non-contact optical guarding changes the math:
Floor space
Typical reports suggest a 50–70% footprint reduction on cells with high access frequency, since a sensing field replaces swing-clear doors and interlocked cages.
Access efficiency
Field deployments commonly show 3–5× shorter operator intervention cycles on cartoning, palletizing, and small-lot stamping lines.
Maintenance cost
Non-contact detection avoids the mechanical wear that drives recurring replacement of door switches and safety interlocks on high-cycle equipment.
Industrial Safety Solutions by Application
The applications below map directly to the safety solutions we engineer for real-world industrial environments. From high-vibration press brakes to dynamic AGV navigation, select your application to explore customized parameters and integration guidelines.
Safety for Press Machine
Point-of-operation guarding to protect operators from pinch points and bending hazards. Utilizing 14mm high-resolution light curtains with ultra-fast <15ms response times, ensuring instantaneous stops and compliance with OSHA standards.
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Safety for Robot Cell
Robust perimeter and access control for automated welding and assembly zones. Designed with multi-beam safety light grids and area scanners to prevent unauthorized entry while enabling continuous, uninterrupted robot operation.
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Safety for AGV
Dynamic anti-collision and navigation solutions to keep automated guided vehicles moving safely. Featuring high-accuracy LiDAR and laser scanners capable of 270° obstacle avoidance in complex factory floors.
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Safety for Packaging
Ensuring operator safety without halting continuous material flow. Integrated with muting-enabled light curtains and durable IP67 enclosures to withstand washdown procedures and the rigors of high-speed conveying lines.
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OEM & Custom Safety Sensors
Tailored engineering services to co-develop safety sensors that fit seamlessly into proprietary machinery. Offering customized form factors, specialized PLC interfaces, and private-label readiness for global OEM integrators.
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Selection Guide
Why Choose CCH as Your Safety Light Curtain Manufacturer — OEM & 20+ Years R&D
CCH Shanghai Sensing Intelligence Technology – the QJKH trademark – is a tightly-focused manufacturer of industrial safety sensors and controllers. Our core engineering group has 2 decades constantly in safety light curtains, safety laser scanners, safety relay modules, and LiDAR class sensing. Having a factory in Hangzhou Airport Economic Demonstration Zone allows us to have direct component control, and sharply reduce the loop from a technical requisition from a distributor, to a qualified sample in a container.
01
20+ years engineering continuity
The R&D team has remained in the same industrial safety sensor product category since its foundation – the deep domain expertise you would want from an expert.
02
Hangzhou factory, direct control
All in one roof for production, quality control, and test bench in the Hangzhou Airport Economic Demonstration Zone. Factory visits for qualifying traders are encouraged.
03
OEM and white-label programs
Private housings, bespoke labels, bespoke firmware, and devoted packaging for trader-specific packages. Know-how team guidance with design and business teams on your side.
04
IEC 61496-certified product line
All standard SKUs ship with a current certification bundle and 3rd party test lab references – the bit of paper trail your end-user adjustment can expect in the brief review.
05
Free test samples program
A qualified B2B seller can receive test samples on your request. Test how it meets your own brief before any initial order delivery.
06
Global logistics, responsive support
Direct delivery to major international channels; prompt technical and business help through your local time zone.
Light Curtain Safety Certifications & Procurement Framework
Certifications & Compliance
A safety light curtain is a regulated product. It must meet tested third-party certification to distinct standards for the right to protect a press brake or robotic cell. Our entire product portfolio includes the following certifications along with the test lab references and report ids: individual samples are listed with every purchase shipment, and are available in advance on request.
Type 4 · ESPE
IEC 61496-1 & IEC 61496-2
Performance Level
ISO 13849-1 · PL e
Functional Safety
IEC 62061 · SIL CL 3
Enclosure Rating
IEC 60529 · IP65 / IP67
CE Marking
EU Machinery Directive
TÜV / UL
Third-party verified
OSHA Alignment
29 CFR 1910.212
ANSI B11.19
Performance Criteria
Performance Criteria
| Standard | Scope | Applicable region |
|---|---|---|
| IEC 61496-1:2020 | General requirements for electro-sensitive protective equipment (ESPE) | Global |
| IEC 61496-2:2020 | Active opto-electronic protective devices (AOPDs) | Global |
| ISO 13849-1:2023 | Safety-related parts of control systems — performance levels | Global |
| IEC 62061 | Functional safety — SIL claim limit for electrical systems | Global |
| ISO 13855 | Positioning of safeguards — safety distance formula | Global |
| ANSI B11.19-2019 | Performance criteria for safeguarding | North America |
| OSHA 29 CFR 1910.212 | General machine guarding requirements | United States |
| EN ISO 12100 | Risk assessment and risk reduction methodology | Europe / Global |
| EN IEC 60529 | IP code — enclosure protection degrees | Global |
Procurement Guide
The larger majority of safety sensor import landing pages from the global brand worldwide stop the buyer at “Contact us”, kicking the entire cost, delivery, and MOQ discussion behind a gated form. For importers and OEM integrators running a competitive bid, that gating is a real frictition point. We are posting the framework openly here so your buy decision can pre-qualify the fit.
Pricing factors — what drives a quotation
Unit cost is not a single factor; it is a calculation against four parameters. Buyers who simply ask for a blind price without delivering these parameters, usually find us quoting a range that narrows at the RFQ stage.
- Type and expected level of performance – PL e / 4 provides a price premium over PL c / 2 reflecting the the redundant self-diagnosis architecture.
- Selection of resolution and protective field height – 14 mm finger resolution costs more per beam than 30 mm hand resolution; taller curtains require more beam pairs.
- Additional functions – integral muting, cascading, floating blanking, and high-IP builds-up cost incrementally.
- Order profile – first-article orders for 10 pcs are priced differently from repeat OEM programs for 500 pcs per month; payment term and shipping incoterm also affect the landed cost.
For a configured quotation request an offer at our quote form or start with a free test sample.
Lead time, MOQ & shipping terms — typical
| Parameter | Typical value | Notes |
|---|---|---|
| MOQ — standard SKUs | From 10 pcs | Lower trial quantities available for sampling |
| MOQ — OEM custom | 50 pcs per SKU | Private labeling, custom housings, custom firmware options |
| Lead time — standard | Typically 15 days from order confirmation | Subject to component availability at the date of order |
| Lead time — OEM custom | Typically 30–45 days | Includes tooling, first-article inspection, certification review |
| Shipping Incoterms | FOB Shanghai · CIF · DDP | Global ports served; consolidation supported |
| Payment terms | T/T, L/C at sight, negotiated | Established accounts qualify for net terms after 2–3 completed orders |
| Free test samples | Available on request | Qualifies the product against your spec before the first purchase order |
A note on installation — the most common buyer mistake
Teaching resources independent of our services and field-service reports align on one conclusion: safety light curtains are most ofen installed too close to the hazard; this deflates their safety enumerator even if their Type rating remains correct. The answer is ISO 13855: S= (K T) + C where K is the human approach speed (2000 mm/sec for direct approach), T is the total system response time, and C is an extra penetration distance consistent with the curtains resolution. Every CCH shipment includes the worked formula and a site-specific distance calculation on request — the same discipline every ISO 13855-compliant safety distance table is built on.
Frequently Asked Questions
Yes. OSHA 29 CFR 1910.212 requires one or more methods of machine guarding on any machine that can cause injury during normal operation, and OSHA’s own standard interpretations accept safety light curtains as a compliant presence sensing device for press brakes, stamping presses, and robotic cells — provided the curtain satisfies ANSI B11.19 performance criteria and is installed at the safety distance required by ISO 13855.
A Type 2 curtain runs a periodic self-test and is valid up to PL c / SIL CL 1 — acceptable on low-risk applications where the worst plausible injury is minor. A Type 4 curtain runs continuous redundant self-diagnosis, tolerates a single internal fault, and is rated up to PL e / SIL CL 3 — required where a missed stop could cause a severe or fatal injury. Your ISO 12100 risk assessment determines the PL requirement and therefore the Type. Press brakes and robotic cells almost always land at PL d or PL e, which rules out Type 2.
Three design choices address each failure mode. IP65 / IP67 enclosures keep fine dust and splash water out of the emitter and receiver optics. Recessed lens geometry prevents direct impact damage from pallets and tooling bumps. Continuous self-diagnosis distinguishes between a real beam interruption and a dirty lens signal, so operators receive a service indicator instead of a nuisance stop. A forum thread on a warehouse deployment captured the pain point when these protections are missing: the safety curtain faulted every time dust built up on the sensor face. Our IP-rated housings and periodic-clean service indicators are engineered around that exact failure mode.
ISO 13855 defines the distance as S = (K × T) + C, where K is the human approach speed (2,000 mm/s for direct approach, 1,600 mm/s for parallel approach), T is the total stopping time of the machine plus the curtain’s response time, and C is an additional penetration distance that depends on resolution — 0 mm for 14 mm finger resolution, up to 850 mm for 40 mm arm resolution. CCH provides the worked calculation for your cell on request, and our product datasheets list the response time figure you need for T.
Yes. Our curtains use OSSD 24 VDC PNP outputs and an M12 5-pin connector — the interface convention the broader industrial automation ecosystem adopts, including Allen-Bradley Guardmaster-class safety relays and Siemens SIMATIC F-CPU programs. In practice, the curtain wires directly into a safety relay or a safety-rated input on a CompactLogix, ControlLogix, SLC 500, or S7-1500F controller. We share wiring reference diagrams for the most common PLC families as part of the sample kit.
The Type 4 rating itself is not a price tier — it is an IEC 61496-1 performance bar that either a device satisfies or it does not. Third-party test labs apply the same tests regardless of country of origin, which is why Chinese-engineered devices from CCH can hold the same Type 4 certification carried by European and Japanese brands while pricing off a direct factory cost base. The difference you pay for is not performance; it is brand channel, distributor markup, and import path. Request free samples and run them against your own spec before you decide.
Yes. We run an OEM program with typical MOQ of 50 pcs per SKU, lead time of 30 to 45 days on the first article, and support for private labels, custom housings, custom firmware parameters, and distributor-specific packaging. A commercial and engineering lead is assigned to every OEM account from the first technical review.
Muting is an engineered safety function defined in ISO 13849-1 and IEC 61496-1. It uses a pair of muting sensors to confirm that a pre-approved object — a pallet, a carton — is the item crossing the sensing field, and the curtain automatically re-arms when the object has cleared. A person reaching in during the muting window still triggers the full Type 4 stop. Bypass, by contrast, is the manual override of a safety device outside the risk assessment — a practice discussed on industry forums as a compliance liability. Muting with verified muting sensors is standards-compliant; bypass is not.
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