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HiTECH Technologies, Inc.

Satisfying the World's Level Control Requirements Since 1986

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LDM 41/42 (Minilaser 61)

The LDM 41/42  Laser Distance Measurement Sensor is designed for distance measurement applications in an industrial environment. The LDM 41/42  works based on comparative phase measurement. To achieve this, it emits a visible laser beam with different modulation frequencies. The target being measured returns diffusely reflected light that is subsequently compared with a reference signal. Finally, a microprocessor uses the recorded phase shift to calculate a required distance with mm accuracy. The sensor LDM 41  distinguishes itself through a high precision as well as a big independence of the surface of the measured object. The LDM 42  is design for fast measurement on a white target. The red, well visible laser beam allows a simple alignment.

Operating Principle:

Phase comparison

Features:

  • Millimeter precise measurement on various surfaces
  • Long range reflector-less distance measurement
  • With additional reflectors on the target object measurements over 100 m
  • Operation in extreme ambient temperatures with high precision and range
  • High supply voltage range between 10 V and 30 V DC with low power consumption
  • Safe operation through laser class 2
  • Easy adjustment through visible laser beam
  • One connection cable for supply voltage, serial data interface, switching and analog output
  • Customized parameterization via PC
  • Display of measured values in meters, feet, inches and others due to free scaling
  • Robust, compact housing, easy to install, protection standard IP 65

Options and Accessories

  • Grey filter for signal attenuation
  • Mounting bracket
  • Digital display for analog signals
  • Optional temperature controlled heating
  • Protective housing
  • Protective housing with water cooling
  • Protective tube with purge air connector
  • Protective window

Application:

  • Distance measurement and determination of position
  • Diameter measurement of rolls / coils
  • Fill level measurement
  • Position control
  • Monitoring of safety-relevant parts
  • Monitoring of lifting plants / lifting height measurement and positioning of elevators
  • Monitoring and positioning of cranes and conveyor systems

Specification:

  • Measuring range: 0.2 m … 30 m on almost all natural surfaces
    • Over 100 m achievable depending on the degree of reflection of surfaces
  • Measuring uncertainty: ±2 mm under defined measuring conditions
    • ±3 mm (+15 °C … +30 °C)
    • ±5 mm (-10 °C … +50 °C)
  • Resolution: 0.1 mm, free scalable
  • Reproducibility: 0.5 mm
  • Measuring time: 0.24 s … 6 s adjustable or automatic in mode DT
    • 0.1 s in mode DW on white surface
    • 20 ms in mode DX on white surface (only LDM42A)
  • Laser divergence: 0.6 mrad
  • Laser class: Laser class 2 acc. to DIN EN 60825-1:2001-11 (650 nm, red)
  • Operating temperature: -10 °C … +50 °C
    • -40 °C … +50 °C (with optional heating) 6)
  • Storage temperature: -40 °C … +70 °C
  • Supply voltage: 10 V … 30 V DC
  • Power consumption: Ca. 1.5 W
    • Ca. 24 W (with optional heating)
  • Serial interface: RS232 or optional RS422, max. Baud rate 38400, ASCII,
    • Setting of measuring functions, scaling, measuring time via commands, display of measured values, internal temperature of the device and error code
  • Switching output: Programmable switching threshold and hysteresis,
    • “High-Side” switch, maximum load 0.5 A
  • Digital Input: External trigger, 3 V – 24 V, programmable delay
  • Analog output: Programmable distance range limits,
    • 4 mA to 20 mA adjustable reaction on error(3 mA, 21 mA or last valid measured value)
  • Housing material: Aluminum, powder-coated
  • Size: 187 mm × 96 mm × 50 mm
  • Weight: 850 g
  • Protection class: IP 65
  • Shock resistance: 10 g / 6 ms (DIN ISO 9022-3-31-01-1)
  • MTBF: 30,000 hours at 25 °C
  • Mounting: 4 drill holes for M6 screws, 100 mm x 85 mm

Filed Under: Lasers

Resources:

Inquiry_Form_LDM
Datasheet_LDM4xA_EN_V3.6

Phone: 1-866-DR-LEVEL
Local: 215-321-6012
Fax: 215-321-6067
E-mail: info@hitechtech.com
301 Oxford Valley Road
Building 505A
Yardley, PA 19067-7711

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