pmt20rgt – photo tr pl 20m spdt timer

Why Choose the Carlo Gavazzi PMT20RGT Through-Beam Photoelectric Receiver?

The Carlo Gavazzi PMT20RGT is a robust through-beam photoelectric receiver with integrated time-delay functions, designed for reliable long-range object detection in industrial automation and machine-control applications. Part of the Carlo Gavazzi PMT series, it operates with a corresponding through-beam transmitter to provide dependable detection across conveyors, production machinery and material handling systems.

The PMT20RGT provides a rated operating distance of up to 20 m and detects 880 nm modulated infrared light from the associated transmitter. Adjustable sensitivity allows the receiver to be optimised for the installation, while the through-beam sensing principle provides precise detection with minimal dependence on the colour, finish or reflectivity of the object passing through the beam.

Designed for flexible industrial integration, the PMT20RGT operates from 10.8–264 V DC or 21.6–264 V AC and provides an SPDT relay output with NO+NC contacts. Integrated timer functions include delay on operation, delay on release and one-shot operation, while screw terminals, a PG13.5 cable entry and IP67 protection support robust permanent installations.

Key Advantages

• Long 20 m through-beam sensing distance for detection across conveyors and large machinery.
• 880 nm modulated infrared sensing provides precise and reliable optical detection.
• Adjustable sensitivity enables optimisation for different installation conditions.
• Integrated timer functions provide configurable timed responses without requiring a separate timer module.
• SPDT relay output with NO+NC contacts provides flexible industrial control integration.
• Wide 10.8–264 V DC / 21.6–264 V AC supply range supports numerous control-system voltages.
• IP67 protection and robust plastic construction suit demanding industrial environments.

Key Features

• Carlo Gavazzi PMT series photoelectric receiver.
• Through-beam photoelectric sensing principle.
• 20,000 mm / 20 m rated operating distance.
• 880 nm modulated infrared light.
• Adjustable receiver sensitivity.
• Selectable light-on / dark-on switching.
• 10.8–264 V DC operating supply.
• 21.6–264 V AC operating supply.
• SPDT electromechanical relay output.
• Normally open + normally closed contacts.
• Integrated delay-on-operation timer function.
• Integrated delay-on-release timer function.
• One-shot timer operation triggered on leading or trailing edge.
• 20 Hz switching frequency.
• LED indication for convenient setup and status monitoring.
• Screw-terminal electrical connection.
• PG13.5 cable entry.
• Rectangular plastic housing.
• IP67 degree of protection.

Long-Range Detection with Integrated Timing Control

The Carlo Gavazzi PMT20RGT operates as the receiving element of a through-beam photoelectric system, monitoring the modulated infrared beam generated by a corresponding transmitter installed on the opposite side of the detection area. When an object interrupts the beam, the receiver changes the state of its SPDT relay output. This arrangement provides precise detection across distances of up to 20 m and is largely independent of the target's surface colour or reflectivity.

Integrated timing functionality extends the PMT20RGT beyond basic object detection. Delay-on-operation, delay-on-release and one-shot functions allow the relay response to be adapted to the machine process, helping filter short detection events, extend output signals or coordinate downstream equipment without a separate external timer. The wide AC/DC supply range and relay output also make the sensor straightforward to integrate into both modern and established industrial control systems.

Typical Applications

• Long-range conveyor object detection.
• Packaging and processing machinery.
• Material handling and logistics systems.
• Timed presence and absence monitoring.
• Product counting and positioning.
• Machine sequencing and process control.
• Automated production and assembly lines.
• Industrial AC/DC relay-based control systems.