The OPB720A Series reflective switches detect objects as far away as 24” (610 mm) using standard 90% reflective material, and can detect objects as small as 0.08” (2 mm). The OPB720A sensor is not affected by ambient light in most conditions, as it compensates for ambient light using a synchronous driver detection scheme. It has a logical output that switches from a high level with no reflection target to a low level with a reflection target. The OPB720A series minimizes switching oscillations on the output by adding hysteresis. The series can be used in either a reflective or interruptive mode depending on the type of material used for the target.
The OPB720A Series reflective switches detect objects from 0.04" to 36" (1 mm to 915 mm) using standard 90% reflective material and can sense objects as small as 0.08" (2 mm). The sensor offers an open‑collector output, ambient‑light rejection below 100 K Lux, and a 39" (990 mm) lead with 28 AWG wire.
The manual includes electrical characteristics such as a supply voltage of 10 V–30 V, maximum collector voltage of 30 V, collector current of 50 mA, and power dissipation of 300 mW. It also covers operating temperature (0 °C to +50 °C), storage temperature (‑40 °C to +80 °C), and laser safety classification (Class 1M for the OPB720A‑36VZ model).
| Detection distance range | 0.04" to 36" (1 mm to 915 mm) |
|---|---|
| Minimum object size | 0.08" (2 mm) |
| Ambient light rejection | < 100K Lux |
| Output type | Open collector |
| Cable lead length | 39" (990 mm) with 28 AWG wire |
| Supply voltage | 10 V to 30 V |
| Maximum collector voltage | 30 V |
| Collector current | 50 mA |
| Power dissipation | 300 mW |
| Operating temperature range | 0 °C to +50 °C |
| Laser safety class (OPB720A‑36VZ) | Class 1M |
The OPB720A series can detect objects from 0.04" to 36" (1 mm to 915 mm).
The sensor provides an open‑collector output.
It operates from a supply voltage of 10 V to 30 V.
The OPB720A‑36VZ model is classified as a Class 1M laser safety device.