MLM Laser Triangulation Meters for Precise Laser Measurement

MLM Laser Triangulation Measurement Sensors

Model MLM
Laser Triangulation Sensors

MLM Laser Triangulation Measurement Sensors

Laser Triangulation & CCD array technique with intelligent digital signal processing
Non-Contact Measurement of Distance, Displacement, Thickness & Difference
Matching paired sensors will automatically provide width/thickness or differential measurement
Works on almost any surface
Measurement Ranges: 70 - 170 mm (2.75 - 6.69IN)
Resolution: 0.001 mm to 0.005 mm
Measurement frequency of 2000 Hz
Robust plus compact design
RS232 or RS422 Serial Interface
Analog Output 4 - 20mA or 1 - 9 VDC
Synchronized thickness measurement with two sensors
Secondary Environmental Enclosure are available including Air Purged, Air Cooled and Water Cooled with Air Purging

Typical Applications
Level Measurement Distance measurement Thickness Measurement Weight/Volume Control Constant Tension Control Roll Diameter Profile Measurement	Control of vacuum in containers *Measurements for feedback in Production Lines* Measurements for quality control and statistics Vibration Monitoring of a Rotating Object Control of Surface Treatments

General Description

The MLM Laser Triangulation Sensors (LTM) is a compact unit with integrated optics and signal processor for precise measurement of distance or product thickness and width. A focused laser spot is illuminated on the object and the image distance determined by internal CCD array. LED’s indicate when the object is at center or is outside measuring range. Installation software is provided for connection to a PC and to display measured values. Measurement of data is via RS232 and analog outputs.

All standard MLM models operate at a measuring frequency of 2000 measurements per second. All standard MLM models operate at a serial output update frequency of either 1000 or 2000 measurement points per second.

All standard MLM models have a programming/select functionality. Group mode is the main feature. In Group Mode a running average is calculated over a user specified number of measuring points. The user also programs the sensor to disregard a number of, usually all, bad (zero) measuring points before calculating the average value. The average values are calculated at full measuring frequency and are used for converting the analog signals. Several median filters and Level Mode are other available features.

Two identical MLM LTM’s when connected together automatically provide change in thickness, width or difference values. The MLC standard models operate at a 2kHz measuring frequency and at a 1kHz or 2kHz update frequency, and have a serial interface baud rate of 38400 or 115200.

These LTM’s can be programmed to output the value in medium filter format, simple average or as running average filter where the user specifies the number of measuring points for the filter block as well as the number of bad zero values to be ignored before calculating and outputting the average value via both the serial and analog outputs. The simple average filter compresses the measuring points into one single output disregarding missing values. A level mode is also available that inverts the outputted values.

These LTM’s have a broad range of usage for measurement off surfaces where other devices fail. Ideal for measuring off wood, plastic, glass, rubber, paper, foam, textiles, food product, cold, hot or molten metals as well as various liquids.

Performance Information

MLM Models

Model	MLM72.5	MLM75	MLM82.5	MLM95	MLM120
Measured range (mm)	5	10	25	50	100
Measuring range (mm)	70 - 75	70 - 80	70 - 95	70 - 120	70 - 170
Center distance (mm)	72.5	75	82.5	95	120
Resolution at short range (mm)²	0.001	0.001	0.001	0.001	0.001
Resolution at long range (mm)²	0.001	0.001	0.002	0.002	0.005
Measurement Linearity (mm)²	±0.003	±0.004	±0.008	±0.013	±0.025
Laser Spot Diameter (mm)	Ø 0.1	Ø 0.3	Ø 0.3	Ø 0.4	Ø 0.4