Keyence PZ-G62CN Retro-Reflective Sensor

Keyence PZ-G62CN Transparent Object Detection Sensor

The Keyence PZ-G62CN belongs to the PZ-G series of built-in amplifier photoelectric sensors. Specifically, this model addresses a common industrial challenge: detecting clear or translucent materials that standard diffuse sensors often miss. The sensor operates on a retro-reflective principle using an external reflector. Therefore, it identifies objects by measuring the light 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 serves as the light source. This wavelength choice minimizes interference from visible ambient light and improves stability when sensing transparent films, PET bottles, or glass containers. Additionally, the sensor offers a response time of 500 µs maximum, enabling high-speed detection on fast-moving production lines.

Electrical and Output Characteristics
This unit provides an NPN open collector output rated for 30 VDC and 100 mA maximum. Users can select between LIGHT-ON and DARK-ON operation modes via a switch. A 1-turn trimmer with 230° rotation allows manual sensitivity adjustment. The M8 connector design simplifies replacement and reduces wiring time. Meanwhile, built-in protection circuits guard against reversed polarity, overcurrent, and surge events.

Mechanical and Environmental Specifications

Housing and Protection
The PZ-G62CN features a glass-fiber reinforced PBT housing and a polyarylate (PAR) lens cover. This combination delivers mechanical strength and chemical resistance. Furthermore, the enclosure achieves IEC IP67 and DIN IP69K ratings. The IP69K rating specifically indicates 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 operates 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 withstands 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-G62CN using 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 the internal alignment. First, position the reflector (R-2L) directly opposite the sensor face. Next, verify that the beam path remains clear of obstructions. The sensor and reflector must align within the beam angle for reliable 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 procedure differs from standard reflective sensing. Specifically, place the transparent target in the beam path. Then, rotate the sensitivity trimmer until the orange output indicator illuminates. Remove the target and confirm the indicator turns off. Finally, verify that the green stable operation LED remains lit in both states.

Wiring and Interference
Connect the M8 connector to a compatible cable. Route the sensor cable away from power lines and high-voltage sources to prevent electrical noise. The PZ-G62CN includes an automatic different frequency function that permits side-by-side installation of up to 2 units without optical interference.

Packaging List

• Keyence PZ-G62CN Sensor Unit × 1

• Instruction Manual × 1

Note: The M8 connector cable and R-2L reflector are sold separately.

FAQ

Q1: What reflector is required for the PZ-G62CN?
A: The PZ-G62CN requires the R-2L reflector to achieve its specified 0.1 to 1 m detecting distance. This reflector is not included with the sensor and must be ordered separately.

Q2: Can this sensor detect clear PET bottles?
A: Yes. The PZ-G62CN is specifically designed for transparent object detection. Its infrared LED and retro-reflective operating principle detect beam attenuation caused by clear or translucent materials. For optimal results, adjust sensitivity with the target in place.

Q3: What is the maximum tightening torque for installation?
A: The mounting hole part accepts a maximum torque of 0.5 N·m. Exceeding this value may damage the glass-fiber reinforced PBT housing.

Q4: Does the sensor include a cable in the package?
A: No. The Keyence PZ-G62CN uses an M8 connector, and the mating cable is sold separately. Customers should specify the required cable length and connector type when ordering.

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.