Tired of missing parts on a fast moving line? The Keyence PR-G51CBD self-contained M18 threaded-type through-beam photoelectric sensor catches every object before it slips away. It sends a clear signal the moment something breaks the light beam, so you can stop a machine, count items, or trigger a safety alarm. If you need reliable detection over long distances, this sensor solves the problem that many cheap units cannot handle.
Keyence PR-G51CBD self-contained M18 threaded-type through-beam photoelectric sensor
Manufacturing lines often lose productivity because a sensor cannot see far enough or reacts too slowly. When a detector fails, the whole line stops and repair costs rise. This sensor gives you a 30 meter detection range and a 1 ms response time, so you see objects instantly and keep the line moving. It also offers both NPN and PNP outputs, letting you match any control system without extra wiring.
Benefits
- Long 30 m range reduces the number of sensors you need.
- Fast 1 ms response prevents missed parts on high speed lines.
- Dual NPN/PNP outputs fit any PLC or controller.
- IP68 rating keeps the sensor working in dusty or wet environments.
- Simple one-turn sensitivity trimmer lets you fine-tune detection quickly.
Key Features
- Through-beam design for reliable detection.
- Threaded M18 mount for easy installation.
- M12 4-pin connector for secure wiring.
- Red LED light source with four elements.
- Two control outputs: Dark-ON and Light-ON.
- Power supply 10-30 VDC with low ripple.
- Operating temperature -20 C to +70 C.
- Vibration and shock resistance for rugged factories.
- Included accessories: manual, M18 nut and lock washer.
Specifications
| Model |
PR-G51CBD |
| Type |
Thrubeam |
| Mounting |
Threaded mount type |
| Output |
NPN + PNP |
| Cable Connection |
M12 connector (4-pin) |
| Detecting Distance |
30 m (98.43 ft) |
| Number of Control Outputs |
2 (NPN + PNP) |
| Output Operation |
Output 1: Dark-ONOutput 2: Light-ON*1 |
| Response Time |
1 ms |
| Sensitivity Adjustment |
One-turn trimmer (230°) |
| Light Source |
4 elements, Red LED (631 nm) |
| Indicator Lamps |
Transmitter: power (green)Receiver: output (yellow), stable operation (green) |
| Control Output Ratings |
NPN + PNP open collectorMax 30 VDC / 100 mAResidual voltage: ≤1.2 V (<10 mA), ≤2 V (10–100 mA) |
| Stop Emission Input |
Non-voltage input, ON ≥1 ms, OFF ≥20 ms |
| Protection Circuit |
Reverse power, power surge, output overcurrent, output surge, reverse output connection |
| Power Supply |
10–30 VDC (Ripple P-P ≤10%) |
| Power Consumption |
Transmitter: 450 mW max (15 mA at 24 V)Receiver: 360 mW max (12 mA at 24 V) |
| Enclosure Rating |
IP68 (IEC60529), IP69K (DIN40050-9), NEMA 4, 6, 13 |
| Insulation Resistance |
≥20 MΩ (500 VDC) |
| Ambient Light Tolerance |
Incandescent: ≤5,000 luxSunlight: ≤20,000 lux |
| Ambient Temperature |
-20 to +70 °C (-4 to 158 °F) |
| Relative Humidity |
35–85% RH (No condensation) |
| Storage Temperature |
-20 to +70 °C (-4 to 158 °F) |
| Withstand Voltage |
1,000 VAC, 50/60 Hz, 1 min |
| Vibration Resistance |
10–55 Hz, 1.5 mm double amplitude, 2 hrs in X, Y, Z |
| Shock Resistance |
1,000 m/s², 6 times in X, Y, Z |
| Accessories Included |
Instruction manual, M18 nut, lock washer |
| Weight |
Approx. 85 g |
