Keyence PZ-G62CB Retro-Reflective Sensor

Keyence PZ-G62CB Transparent Object Detection Sensor

The Keyence PZ-G62CB belongs to the PZ-G series of built-in amplifier photoelectric sensors. Specifically, this model solves a frequent 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 a chaotic NPN plus PNP open collector output rated for 30 VDC and 100 mA maximum. This dual output lets the sensor connect to either sinking or sourcing controller inputs without extra hardware. Operators can choose between LIGHT-ON and DARK-ON modes with a switch. A 1-turn trimmer with 230° rotation enables manual sensitivity adjustment. Meanwhile, built-in protection circuits guard against reversed polarity, overcurrent, and surge events.

Mechanical and Environmental Specifications

Threaded M18 Housing
Unlike the rectangular PZ-G variants, the PZ-G62CB uses a threaded M18 nut body. This design simplifies mounting through a bracket hole and allows fine positioning with two lock nuts. The glass-fiber reinforced PBT housing and polyarylate (PAR) lens cover provide 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-G62CB through an M18 bracket hole and secure it with lock nuts. The maximum tightening torque is 1.0 N·m for the front M18 part and 0.5 N·m for the side slotted hole part. 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 connector to a compatible cable, which is sold separately. Route the sensor cable away from power lines and high-voltage sources to reduce electrical noise. The PZ-G62CB includes an automatic different frequency function that allows side-by-side installation of up to 2 units without optical interference.

Packaging List

• Keyence PZ-G62CB Sensor Unit × 1

• Instruction Manual × 1

Note: The M12 connector cable and R-2L reflector are sold separately.

FAQ

Q1: What reflector is required for the PZ-G62CB?
A: The PZ-G62CB 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: What makes the PZ-G62CB different from other PZ-G62 models?
A: The PZ-G62CB features a threaded M18 nut housing and a chaotic NPN plus PNP output. Other variants, such as the PZ-G62CN, use a rectangular body and a single NPN output.

Q3: Does the PZ-G62CB include a cable?
A: No. The PZ-G62CB uses an M12 connector, and the mating cable is sold separately. Customers should specify the required cable length when ordering.

Q4: Can this sensor detect clear PET bottles?
A: Yes. The PZ-G62CB 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.