Keyence PZ-G62EN Transparent Object Sensor

Keyence PZ-G62EN Transparent Object Detection Sensor

The Keyence PZ-G62EN belongs to the PZ-G series of built-in amplifier photoelectric sensors. Specifically, this model solves a common industrial problem: detecting clear or translucent materials that standard diffuse sensors often miss. It works on a retro-reflective principle with an external reflector. Therefore, the sensor detects objects by measuring beam interruption between the sensor head and the reflector.

Core Optical Performance
The detecting distance ranges from 0.1 to 1 m when paired with the R-2L reflector. An infrared LED acts as the light source. This wavelength limits interference from visible ambient light and improves stability when sensing transparent films, PET bottles, or glass containers. Additionally, the response time reaches 500 µs maximum, which supports high-speed detection on fast production lines.

Electrical and Output Characteristics
This unit delivers an NPN open collector output rated for 30 VDC and 100 mA maximum. Operators can choose between LIGHT-ON and DARK-ON modes with a switch. A 1-turn trimmer with 230° rotation enables manual sensitivity adjustment. Notably, the M12 pigtail connector removes the need for a separate mating cable, so installation takes less time. Meanwhile, built-in protection circuits guard against reversed polarity, overcurrent, and surge events.

Mechanical and Environmental Specifications

Housing and Protection
The PZ-G62EN uses a glass-fiber reinforced PBT housing and a polyarylate (PAR) lens cover. This pairing provides mechanical strength and chemical resistance. Furthermore, the enclosure carries IEC IP67 and DIN IP69K ratings. The IP69K rating confirms resistance to high-pressure, high-temperature washdowns. Consequently, the sensor performs reliably in food and beverage processing or pharmaceutical packaging areas.

Operating Conditions
The sensor runs within a temperature range of -20 to +55 °C without freezing. Relative humidity tolerance spans 35 to 85% RH without condensation. For ambient light resistance, it handles incandescent lamp illumination up to 5,000 lux and direct sunlight up to 20,000 lux. Vibration resistance follows a 10 to 55 Hz profile with 1.5 mm double amplitude. Shock resistance reaches 1,000 m/s².

Installation and Setup Guide

Mounting Considerations
Install the Keyence PZ-G62EN with M3 screws through the mounting holes. The maximum tightening torque for the mounting hole part is 0.5 N·m. Over-tightening can crack the housing or distort internal alignment. First, place the reflector (R-2L) directly opposite the sensor face. Next, confirm the beam path stays clear of obstructions. The sensor and reflector must align within the beam angle for stable detection.

Sensitivity Adjustment
After mounting, apply power within the 10 to 30 VDC range. Set the operation mode selector to the desired position (L for LIGHT-ON or D for DARK-ON). For transparent object detection, the setup differs from standard reflective sensing. Specifically, place the transparent target in the beam path. Then, rotate the sensitivity trimmer until the orange output indicator lights. Remove the target and confirm the indicator turns off. Finally, check that the green stable operation LED stays lit in both states.

Wiring and Interference
Connect the M12 pigtail connector to your controller input. Route the sensor cable away from power lines and high-voltage sources to reduce electrical noise. The PZ-G62EN includes an automatic different frequency function that allows side-by-side installation of up to 2 units without optical interference.

Packaging List

• Keyence PZ-G62EN Sensor Unit × 1

• Instruction Manual × 1

Note: The R-2L reflector is sold separately. The M12 pigtail connector is built into the sensor.

FAQ

Q1: What reflector is required for the PZ-G62EN?
A: The PZ-G62EN requires the R-2L reflector to reach its specified 0.1 to 1 m detecting distance. This reflector is not included and must be ordered separately.

Q2: Does the PZ-G62EN need a separate cable?
A: No. The PZ-G62EN ships with an integrated M12 pigtail connector. You only need a compatible M12 extension cable if the pigtail length does not reach your controller.

Q3: What is the difference between the PZ-G62EN and PZ-G62CN?
A: The PZ-G62EN uses an M12 pigtail connector and offers an NPN output. The PZ-G62CN uses an M8 connector with an NPN output. Both share the same optical performance and IP69K rating, so the connector style drives the choice.

Q4: Can this sensor detect clear PET bottles?
A: Yes. The PZ-G62EN is built for transparent object detection. Its infrared LED and retro-reflective principle detect beam attenuation from clear or translucent materials. Adjust sensitivity with the target in place for best results.

Q5: What shipping methods are available?
A: We ship via Fedex, UPS, and DHL. Delivery times vary by destination, and tracking information is provided upon dispatch.