Leuze Sensor DMU218-800/LA-M12 Ultrasonic distance sensor

Description

The DMU218 series uses ultrasonic Time-of-Flight (ToF) technology to calculate distance by measuring the time it takes for a high-frequency sound pulse to bounce off an object. Since it relies on sound waves rather than light, it is exceptionally reliable for detecting targets that typically “confuse” optical sensors, such as transparent glass, liquid surfaces, or dark/reflective plastics.

Features

4–20 mA Analog Output: Provides a stable, noise-immune signal that scales linearly with the measured distance. This is ideal for long-distance wiring where voltage drops would cause inaccuracies.
Industry-Standard M18 Housing: Fits easily into existing machine apertures and standard mounting brackets, making it a drop-in replacement for many industrial setups.
Material Independent: Reliably detects “difficult” targets like water, clear plastic films, and multi-colored components regardless of surface finish.
Internal Temperature Compensation: Automatically adjusts for variations in the speed of sound caused by air temperature changes, ensuring consistent accuracy throughout the 800 mm span.
IP67 Protection: Fully sealed against dust and water ingress, suitable for high-speed industrial lines or washdown areas.

Specifications

Feature	Specification
Sensing Range	80 mm to 800 mm
Blind Zone (Dead Band)	0 mm to 80 mm
Output Type	4 – 20 mA Analog Current
Operating Voltage	10 – 30 V DC
Resolution	Approx. 0.1 mm to 0.2 mm
Housing Material	Nickel-plated brass / PBT
Connection	M12, 4-pin or 5-pin male

Applications

Winding & Unwinding: Monitoring the diameter of small-to-medium rolls (foil, paper, textile) to maintain constant tension.
Small-to-Medium Tank Level: Providing continuous feedback on the fill height of chemical containers, water tanks, or small hoppers.
Loop Control: Monitoring the “slack” or loop depth in narrow-width processing machinery to synchronize motor speeds.
Stack Height Monitoring: Ensuring a consistent height for processed parts or materials in automated assembly.
Wastewater Management: Measuring fluid levels in small sumps or open channels without contacting corrosive media.