Why Choose the Carlo Gavazzi PH18CNT20 Through-Beam Photoelectric Sensor?
The Carlo Gavazzi PH18CNT20 is a compact through-beam photoelectric transmitter designed for reliable long-range object and presence detection in industrial automation applications. Part of the Carlo Gavazzi PH18 series, it combines a space-saving square housing with M18-compatible mounting characteristics, making it suitable for machinery where conventional cylindrical sensors may be difficult to accommodate.
The PH18CNT20 operates as the transmitting element of a separate through-beam photoelectric system. It emits 850 nm modulated infrared light towards a corresponding PH18 receiver positioned on the opposite side of the detection area. This separate transmitter-and-receiver arrangement provides reliable sensing because detection is based on interruption of a dedicated optical beam rather than light reflected from the target.
Designed for sensing distances of up to 20 m, the PH18CNT20 operates from a standard 10–30 V DC supply and is supplied with an integral 2 m cable. Its compact ABS housing, LED power indication and IP67/IP69K environmental protection make it well suited to conveyors, packaging machinery, material handling systems and demanding production environments.
Key Advantages
- Long 20 m through-beam operating distance for reliable detection across machinery and conveyor systems.
- Separate transmitter and receiver principle provides dependable detection regardless of many target surface characteristics.
- 850 nm modulated infrared light supports stable long-range optical sensing.
- Standard 10–30 V DC supply simplifies integration into industrial automation systems.
- Compact square design with M18-compatible mounting suits space-conscious installations.
- Integral 2 m cable provides straightforward hard-wired installation.
- IP67/IP69K protection supports operation in demanding and washdown environments.
Key Features
- Carlo Gavazzi PH18 photoelectric sensor series.
- Through-beam photoelectric transmitter.
- Up to 20 m rated operating distance when used with the corresponding receiver.
- 850 nm modulated infrared light source.
- 10–30 V DC rated operating voltage.
- Dedicated emitter design with no switching output.
- LED indication for transmitter power status.
- Reverse-polarity and transient protection.
- 2 m integral cable connection.
- Compact square housing with M18-style mounting compatibility.
- Durable ABS plastic housing.
- IP67 and IP69K degrees of protection.
- Designed for industrial automation and demanding production environments.
Reliable Long-Range Through-Beam Detection for Industrial Automation
Through-beam photoelectric sensing uses separate transmitting and receiving devices positioned on opposite sides of the area being monitored. The Carlo Gavazzi PH18CNT20 generates the modulated infrared beam, while the corresponding PH18 receiver monitors that beam. When an object interrupts the optical path, the receiver changes its switching output so the connected PLC or machine controller can respond.
Because through-beam systems do not depend on light being reflected back from the detected object, they provide reliable sensing across long distances and can detect a wide range of target materials. The PH18CNT20's 20 m operating range, compact construction and robust environmental protection make it particularly useful for conveyors, packaging lines and industrial machinery requiring dependable long-range object detection.
Typical Applications
- Long-range conveyor object detection.
- Packaging and wrapping machinery.
- Material handling and logistics systems.
- Product counting and positioning.
- Presence and absence monitoring.
- Machine access and passage detection.
- Automated production and assembly lines.
- PLC-controlled industrial automation systems.
