Measurement-grade safety light curtain for high-speed inspection and dimensional gauging. 36×36 mm robust body; resolutions 2.5/5/10/20/40/80 mm; typical detection distance 0.3–3 m (for 2.5 mm up to 0.3–2 m); ultra-fast response up to 0.5 ms (typ. ≤ 15 ms). Dual-channel NPN/PNP outputs, strong anti-interference against welding light/flicker, and convenient installation with aviation/M12 connectors.
Assembly and electronics lines: small-part detection with 2.5–5 mm resolutions; fast reject via 0.5 ms response.
Packaging & logistics: 10–40–80 mm for item presence, aisle and zone guarding.
General machinery: integrate with a safety relay/PLC for stop, interlock and EDM monitoring.
Safety distance reference (ISO 13855): S = K × T + C, where T is machine stopping time.
Frequently Asked Questions
What resolution should I choose on the DQM for measurement versus presence detection?
Match the resolution to the smallest feature you must detect. The DQM offers 2.5/5/10/20/40/80 mm: use 2.5–5 mm for high-accuracy dimensional gauging and small-part counting, 10–20 mm for hand or part presence, and 40–80 mm for arm or wide-opening detection. One series covers fine measurement through area guarding without changing hardware platforms.
How fast is the DQM response time and why does it matter for high-speed lines?
The DQM responds in up to 0.5 ms (typical ≤ 15 ms depending on beam count and I/O load). A faster response shortens the ISO 13855 safety distance and enables tight reject timing on high-throughput inspection, counting and dispensing lines, so parts can be measured or rejected without slowing the conveyor.
How do I calculate the safety distance for the DQM measurement light curtain?
Use ISO 13855: S = K × T + C, where K = 2000 mm/s is the hand-speed constant, T is the machine stop time plus the curtain response (up to 0.5 ms, typ. ≤ 15 ms), and C is the intrusion factor based on the chosen resolution. Our ISO 13855 calculator works it out from your stop time and resolution.
Can the DQM be used as a measurement grating, not just a safety curtain?
Yes. With 2.5 mm resolution and up to 0.5 ms response, the DQM works as a measurement/area grating for dimensional gauging, height and width measurement, edge position and object counting. Protective height follows H = (n − 1) × K, so you can size the beam array to the part window you need to scan.
How do I wire the DQM dual-channel NPN/PNP outputs to a PLC or safety relay?
Feed the two output channels (NPN or PNP, up to ~200 mA each) into a dual-channel safety relay or safety PLC input, keeping the channels independent rather than tied together. Route an EDM/feedback loop through forcibly-guided contacts so a welded contact is detected on restart. The 12/24 V DC supply has reverse and over-voltage protection.
What detection range and ingress protection does the DQM offer?
The DQM has a typical detection distance of 0.3–3 m (0.3–2 m at 2.5 mm resolution), with longer ranges available on request. It is rated IP65 (dust-tight, water-jet resistant) with high ambient-light immunity and anti-welding-glare design, making it suitable for most indoor measurement, assembly and packaging environments.
