Leuze Sensor DMU318-1600.3/4CK-M12 Ultrasonic distance sensor

Description

The DMU318-1600.3/4CK-M12 utilizes Time-of-Flight (ToF) technology, emitting a high-frequency acoustic pulse and measuring the precise micro-interval required for the echo to bounce off a target and return. Because it relies on sound rather than light, it is a superior choice for detecting “difficult” targets such as clear glass, liquid levels, dark plastics, or metallic foils.

The “4CK” configuration is designed for versatile automation; it provides a stable 4–20 mA current loop—ideal for long-distance wiring where voltage drops would cause inaccuracies. Simultaneously, it offers a PNP digital output for threshold alerts. Both outputs can be calibrated using the integrated teach-in button on the rear of the housing, allowing for high-precision “windows” tailored to the specific application.

Features

Analog & Digital Hybrid: Features a 4–20 mA analog current output for real-time distance tracking and a PNP switching output for limit alerts.
Onboard Teach Button (3): Enables rapid manual calibration of the sensing window and switching points directly on the sensor body without needing external software or a PLC.
Mid-Long Reach: A 1.6-meter range makes it suitable for larger tanks, wide conveyors, and pallet detection.
Robust Plastic Housing: Constructed from chemical-resistant PBT (Polybutylene terephthalate), offering significant weight savings (approx. 70g) and resistance to industrial cleaning agents.
Integrated Temperature Compensation: An internal sensor automatically adjusts the distance calculation to account for changes in the speed of sound caused by air temperature fluctuations, maintaining an accuracy of $pm 1%$

Specifications

Feature	Specification
Sensing Range	150 mm to 1600 mm
Blind Zone (Dead Band)	0 mm to 150 mm
Output 1 (Analog)	4 – 20 mA Current
Output 2 (Switching)	PNP Transistor
Operating Voltage	10 – 30 V DC
Resolution	Approx. 1 mm
Housing Material	Plastic (PBT) / Epoxy resin face
Connection	M12, 5-pin male connector
Protection Class	IP67

Applications

IBC & Tank Level Monitoring: Providing a continuous 4–20 mA signal to track the precise fill level of intermediate bulk containers.
Pallet Presence Detection: Sensing the arrival of large pallets on conveyor lines in automated warehouses.
Roll Diameter Monitoring: Tracking the outer diameter of paper, steel, or textile coils to control winding tension.
Loop Control: Monitoring the slack or depth of material loops in web-processing machinery to synchronize drive motors.
Wastewater Management: Measuring fluid levels in sumps or open channels without physical contact with corrosive media.