Autonics BJ15M-TDT is a through-beam photoelectric sensor set (emitter + receiver) with a 15 m range using an 850 nm infrared LED. It runs on 12-24 VDC and provides an NPN open-collector output with Light/Dark ON selection and a sensitivity adjuster. IP67 sealing and power/operation/stability indicators simplify commissioning on industrial lines.
Features
- Long-range 15 m through-beam detection for opaque objects >= 12 mm
- Front-panel sensitivity adjustment for quick threshold setting
- NPN output: 26.4 VDC max, 100 mA max, residual voltage <= 1 V
- Fast <= 1 ms response with strong noise immunity
- Power (emitter), Operation and Stability indicators
- IP67 housing for harsh environments
Technical specifications
| Model | BJ15M-TDT |
| Series | BJ |
| Sensing type | Through-beam (emitter + receiver) |
| Sensing distance | 15 m |
| Sensing target | Opaque materials, >= 12 mm diameter |
| Light source / wavelength | Infrared LED, 850 nm |
| Response time | <= 1 ms |
| Operation mode | Light ON / Dark ON selectable |
| Sensitivity adjustment | Front-panel adjuster |
| Supply voltage | 12-24 VDC +/-10% (ripple P-P <= 10%) |
| Control output | NPN open collector |
| Load voltage/current | <= 26.4 VDC / <= 100 mA |
| Residual voltage | <= 1 V (NPN) |
| Protection circuits | Reverse polarity, output short circuit, overcurrent |
| Indicators | Power, Operation, Stability |
| Protection rating | IP67 (IEC) |
For more information, visit the OEM model page for BJ15M-TDT.




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