Product Description

The Keyence PZ-G51PR and PZ-G51T are compact, high-performance photoelectric sensors designed for precise detection in industrial automation applications. Utilizing a red LED light source and featuring a built-in amplifier, they offer a detection range of up to 20 meters for the PZ-G51PR and up to 1 meter for the PZ-G51T, depending on the model and application. Both sensors support LIGHT-ON and DARK-ON operation modes, selectable via a switch, and include a 1-turn sensitivity adjustment trimmer for fine-tuning. Their robust design ensures reliable performance in harsh environments, with an enclosure rating of IP67/NEMA 4A, 6, 12, and IP69K, making them suitable for applications exposed to dust, water, and high-pressure washdowns.​

Technical Specifications

• Feature PZ-G51PR PZ-G51T
• Model PZ-G51PR PZ-G51T
• Type Transmissive (Thrubeam) Transmissive (Thrubeam)
• Shape Rectangular Rectangular
• Output PNP PNP
• Cable Connection M12 pigtail connector M12 pigtail connector
• Detecting Distance Up to 20 m Up to 1 m
• Light Source Red LED Red LED
• Sensitivity Adjustment 1-turn trimmer (230°) 1-turn trimmer (230°)
• Response Time 500 µs 500 µs
• Operation Mode LIGHT-ON/DARK-ON (switch-selectable) LIGHT-ON/DARK-ON (switch-selectable)
• Indicators (LED) Power (T): Orange LED, Output (R): Orange LED, Stable operation: Green LED, Light receiving: Red LED Power (T): Orange LED, Output (R): Orange LED, Stable operation: Green LED, Light receiving: Red LED
• Control Output Open collector output, 30 V max., 100 mA max., Residual voltage: 1 V max. Open collector output, 30 V max., 100 mA max., Residual voltage: 1 V max.
• Protection Circuit Reversed polarity, overcurrent protection, surge absorber Reversed polarity, overcurrent protection, surge absorber
• Interference Suppression Up to 2 units (when polarization filters are attached) Up to 2 units (with the automatic different frequency function)
• Tightening Torque Rectangular models (Mounting hole part): 0.5 N·m max. Rectangular models (Mounting hole part): 0.5 N·m max.
• Power Supply Voltage 10 to 30 VDC, including Ripple (P-P) 10% 10 to 30 VDC, including Ripple (P-P) 10%
• Current Consumption Transmitter: 20 mA or less, Receiver: 28 mA or less Transmitter: 20 mA or less, Receiver: 28 mA or less
• Enclosure Rating IEC: IP67/NEMA: 4A, 6, 12/DIN: IP69K IEC: IP67/NEMA: 4A, 6, 12/DIN: IP69K
• Ambient Light Resistance Incandescent lamp: 5,000 lux max., Sunlight: 20,000 lux max. Incandescent lamp: 5,000 lux max., Sunlight: 20,000 lux max.
• Ambient Temperature -20 to +55 °C (No freezing) -20 to +55 °C (No freezing)
• Relative Humidity 35 to 85 % RH (No condensation) 35 to 85 % RH (No condensation)
• Vibration Resistance 10 to 55 Hz, Double amplitude 1.5 mm, 2 hours in each of the X, Y, and Z directions 10 to 55 Hz, Double amplitude 1.5 mm, 2 hours in each of the X, Y, and Z directions
• Shock Resistance 1,000 m/s², 6 times in each of the X, Y, and Z directions 1,000 m/s², 6 times in each of the X, Y, and Z directions
• Material Housing, M18 nut (threaded models only): Glass-fibre reinforced PBT, Lens cover: Polyarylate (PAR), Trimmer: Glass-fibre reinforced polyamide (PA), Case connection: Nickel-plated iron and zinc, packing: nitrile butadiene rubber (NBR), Cable: Polyvinyl chloride (PVC) Housing, M18 nut (threaded models only): Glass-fibre reinforced PBT, Lens cover: Polyarylate (PAR), Trimmer: Glass-fibre reinforced polyamide (PA), Case connection: Nickel-plated iron and zinc, packing: nitrile butadiene rubber (NBR), Cable: Polyvinyl chloride (PVC)
• Weight Rectangular M12 pigtail quick disconnect model: Approx. 30 g Rectangular M12 pigtail quick disconnect model: Approx. 30 g