Leuze Sensor DMU318-400.3/2CK-M12 Ultrasonic distance sensor

Description

The DMU318-400.3/2CK-M12 uses Time-of-Flight (ToF) technology, emitting a high-frequency ultrasonic pulse and calculating the exact time it takes for the sound to bounce off a target and return. Because it operates using sound waves, it is immune to the optical “traps” that affect laser sensors, such as clear plastic, glass, or high-gloss metal parts.

The “2CK” configuration is optimized for modern automation. It features a universal Push-Pull output that can be wired as either PNP or NPN, simplifying electrical integration. Furthermore, the integrated IO-Link 1.1 protocol allows the sensor to stream real-time digital distance values (in mm) directly to a PLC and enables remote “teaching” of switching points, which is invaluable for machines that process varying product sizes.

Features

Short-Range Precision: Optimized for the 40–400 mm window, providing high-resolution detection for small parts or precise level control in small tanks.
Universal Push-Pull Switching: A versatile digital output that eliminates the need to choose between PNP or NPN wiring, reducing spare parts inventory.
IO-Link 1.1 Ready: Supports bidirectional communication for remote configuration, signal quality diagnostics, and digital process data streaming.
High Switching Frequency: At approximately 10 Hz, this sensor is significantly faster than long-range models, making it suitable for high-speed counting or presence detection on conveyor lines.
Robust PBT Housing: Constructed from chemical-resistant Polybutylene terephthalate, making it lightweight and resistant to industrial cleaning agents.
Automatic Temperature Compensation: Adjusts internal logic to account for air temperature changes, ensuring the switching point remains stable despite factory environment fluctuations.

Specifications

Feature	Specification
Sensing Range	40 mm to 400 mm
Blind Zone (Dead Band)	0 mm to 40 mm
Output Type	Push-Pull Switching + IO-Link
Operating Voltage	18 – 30 V DC (required for IO-Link)
Switching Frequency	~10 Hz
Resolution	Approx. 1 mm (via IO-Link)
Housing Material	Plastic (PBT) / Epoxy resin face
Connection	M12, 4-pin male connector

Applications

Bottle & Vial Presence: Reliably detecting clear glass or plastic containers on high-speed filling and packaging lines.
Small Hopper Level: Monitoring the fill level of small parts, seeds, or granules in vibration feeders.
Electronic Assembly: Providing distance feedback or presence detection for PCB boards or small trays in pick-and-place machines.
Film Slack Monitoring: Measuring the loop depth of narrow plastic films or foils in converting machinery.
Object Counting: Detecting small, fast-moving items on a conveyor belt where the target color may change frequently.