Leuze Sensor DMU318-1200/VT-M12 Ultrasonic distance sensor

Description

The DMU318-1200/VT-M12 uses Time-of-Flight (ToF) technology to measure the distance to a target. The “VT” model is specifically engineered for environments with multiple sensors or high-speed intermittent processes. By using the Synchronization/Trigger pin, multiple sensors can be wired together to fire in sequence (preventing “cross-talk” interference) or to fire only when a specific part is present under the sensor head.

As an ultrasonic device, it is immune to target color, transparency, or surface gloss. It reliably detects clear glass, liquid levels, or dark plastics that would be invisible to standard laser or infrared sensors. The 0–10 V signal provides a linear representation of the distance within the calibrated window, which can be set using the onboard Teach-in button.

Features

0–10 V Analog Output: Provides a high-resolution voltage signal that scales linearly with the distance to the target, easily integrated into standard PLC analog input cards.
External Trigger/Sync Input: Allows for “Multiplex” operation (preventing interference between adjacent sensors) or “Triggered” measurement (measuring only on command).
Mid-Range Reach: The 1200 mm range is ideal for medium-sized tanks, conveyor width monitoring, and height positioning.
Onboard Teach Button (3): Features a physical button on the rear for manual calibration of the 0 V and 10 V setpoints without external tools.
Robust Plastic Housing: Constructed from chemical-resistant PBT (Polybutylene terephthalate), providing a lightweight (~70g) yet durable solution for industrial environments.
Temperature Compensation: Automatically corrects for variations in the speed of sound caused by ambient temperature changes, maintaining accuracy over the 1.2-meter span.

Specifications

Feature	Specification
Sensing Range	120 mm to 1200 mm
Blind Zone (Dead Band)	0 mm to 120 mm
Output Type	0 – 10 V Analog Voltage
Control Input	Trigger / Synchronization Pin
Operating Voltage	15 – 30 V DC
Resolution	Approx. 1 mm
Accuracy	$pm 1%$ of measured value
Housing Material	Plastic (PBT) / Epoxy resin face
Connection	M12, 5-pin male connector

Applications

Synchronized Level Sensing: Measuring liquid levels in wide tanks using multiple sensors that fire in sequence to avoid acoustic interference.
Object Height Profiling: Triggering the sensor only when a product passes a “gate” to measure its height regardless of color or transparency.
Web Tension & Loop Control: Monitoring the depth of material loops in paper or film processing where the M18 form factor fits into existing machine frames.
Clear Packaging Detection: Counting or measuring the distance to transparent blister packs or glass vials on a high-speed line.
AGV Navigation: Providing distance feedback for mobile robots where triggering is used to reduce power consumption or interference with other sensors.