Keyence PZ-G61CB Retro-Reflective Sensor M18

Keyence PZ-G61CB M18 Retro-Reflective Photoelectric Sensor

Product Introduction

The PZ-G61CB is a threaded M18 nut-type model in the Keyence PZ-G series. Specifically, it combines long-range retro-reflective sensing with the P.R.O. function, which stabilizes detection on dirty or glossy targets. Technicians choose this sensor for conveyors, packaging equipment, and material handling lines where a compact threaded body must cover several meters.

Moreover, the chaotic output design supports both NPN and PNP control inputs, so one part number serves mixed PLC cabinets. The glass-fiber reinforced PBT housing and polyarylate lens cover resist impact and cleaning chemicals. Therefore, the unit fits food processing, automotive assembly, and logistics sortation.

Technical Specifications

The PZ-G61CB detects targets from 0.1 to 4.2 m when paired with the R-2L reflector. A red LED provides the light source, and a single-turn trimmer (230°) sets sensitivity. Additionally, the response time reaches 500 µs maximum, which supports fast-moving objects on high-speed conveyors.

Output configuration includes a chaotic (NPN + PNP) open collector rated at 30 V maximum and 100 mA maximum, with residual voltage of 1 V maximum. Users may switch between LIGHT-ON and DARK-ON operation modes. The orange LED indicates output status, while the green LED confirms stable operation. However, the design offers no spot diameter specification and no built-in communication ports, so it suits discrete sensing rather than networked diagnostics.

Electrical protection covers reversed polarity, overcurrent, and surge absorption. Besides, interference suppression allows up to two units through polarization filters or the automatic different frequency function. The supply voltage ranges from 10 to 30 VDC nominal, including ripple (P-P) 10%, and current consumption stays at 34 mA or less.

Mechanical and Environmental Parameters

The housing uses glass-fiber reinforced PBT, and the lens cover uses polyarylate (PAR). Both materials tolerate typical factory chemicals and cleaning agents. Operating temperature spans -20 to +55 °C with no freezing, and relative humidity runs from 35 to 85 % RH without condensation.

Furthermore, the protection rating reaches IEC IP67, NEMA 4A/6/12, and DIN IP69K. Ambient light resistance handles incandescent lamps at 5,000 lux maximum and sunlight at 20,000 lux maximum. Vibration resistance covers 10 to 55 Hz with 1.5 mm double amplitude for 2 hours in each X, Y, Z direction. Shock resistance reaches 1,000 m/s², six times in each axis. Finally, the approximate weight is 15 g, and mounting torque is 1.0 N·m maximum at the front M18 part and 0.5 N·m maximum at the side slotted hole.

Installation Guide

First, insert the threaded M18 body through the bracket hole, then secure it with nuts and tighten to no more than 1.0 N·m. Next, align the sensor face with the R-2L reflector at the required distance within the 0.1–4.2 m range. Then plug the M12 connector cable into the sensor, since the cable is sold separately.

Afterward, connect the 10–30 VDC supply and wire the chaotic output to the controller input. Besides, adjust the 1-turn trimmer until the green stability LED lights during normal operation. Select LIGHT-ON or DARK-ON according to the control logic. If two sensors sit close together, mount them with opposite polarization or enable the automatic different frequency function. Finally, verify detection with a test target and confirm the orange output LED changes state correctly.

Packaging List

• 1 × Keyence PZ-G61CB photoelectric sensor

• 1 × Mounting nut set

• 1 × Reflector (R-2L type, where included)

• 1 × Quick reference instruction sheet

FAQ

Q1: What is the maximum detecting distance of the PZ-G61CB?
A: The PZ-G61CB reaches 4.2 m with the R-2L reflector, and the minimum distance is 0.1 m.

Q2: Does this sensor support both NPN and PNP controllers?
A: Yes. This model provides a chaotic (NPN + PNP) open collector output rated 30 V and 100 mA maximum.

Q3: Is a cable included with the PZ-G61CB?
A: No. The sensor uses an M12 connector, and the cable is sold separately.

Q4: Can the PZ-G61CB survive washdown cleaning?
A: Yes. Its IP69K rating and PBT housing support high-pressure washdown in food and beverage plants.

Q5: What shipping methods do you offer?
A: We ship worldwide through Fedex, UPS, and DHL, with tracking provided for every order.