How does SWIR material detection work?

SWIR sensors analyze the reflected light from organic materials, enabling precise differentiation of paper, wood, plastics and other materials in real time.

In which industries is polyIdent used?

polyIdent is used in various industries, including the paper industry, wood processing, food production, plastics processing and mechanical engineering.

Up to what temperatures do optoGuard sensors operate?

optoGuard models are designed for extremely hot industrial environments and, depending on the model, also support ATEX zones.

How does inline humidity measurement save energy?

Real-time control of dryers prevents over- and under-drying, which significantly reduces the energy required in the drying process.

LDM42 - Distance measurement over long distances

The LDM42 laser distance sensors from Astech GmbH have been rounding out our range of high-performance sensors for many years. The opto-electronic Distance sensors can measure distances of up to 30m without a reflector or 100m with a reflector with millimeter accuracy.

LDM42 sensors operate contactlessly according to the principle of phase comparison measurement (amplitude modulation) and enable the precise measurement of distances.

The sensors are characterized by high accuracy even at long distances and are largely independent of the surface of the target. The red, highly visible laser beam allows for easy alignment.

The LDM-Sensor can also be used on red-hot parts and, due to its long range, can detect positions, distances, etc. from a safe distance even in harsh environmental conditions.

Different interfaces are available for connection to the process control: analog output, Profibus, Profinet. For devices with a fieldbus, it is possible to easily read the data from several devices into the controller.

Technical Specifications (Optimized)	LDM 42 A	LDM 42 p	LDM 42 PN
Range (reflector)	0,2 … 30 m (100 m)	0,2 … 30 m (100 m)	0,2 … 30 m (100 m)
Resolution (accuracy)	0,1 mm +/- 3 mm	0,1 mm +/- 3 mm	0,1 mm +/- 3 mm
Measuring rate max.	10 50-Hz	10 50-Hz	10 50-Hz
laser class	2	2	2
Serial interface	RS 232 (opt. 422)	RS 232	RS 232
outputs	1 digital / 1 analog (4-20 mA)	1 digital	1 digital
fieldbus		Profibus DP2	Profinet IO

Application examples:

Diameter measurement of rolls/coils
Distance measurement on red-hot parts
level measurement
positioning tasks
Monitoring of safety-relevant parts
Monitoring of lifting systems / lifting height measurement and elevator positioning
Monitoring and positioning of crane and conveyor systems

DATA SHEET LDM 42A/P/PN

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