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Quick Details

  • Place of Origin: Shandong, China (Mainland)
  • Brand Name: CNPS
  • Model Number: LMRD-50
  • Product name: laser methane leak detector for natural gas leak detection
  • Detecting Gas: Methane
  • Min. Resolution: 5ppm*m
  • Distance detecting: 50 M
  • Response time: 0.05s
  • Weight: 0.6kg
  • Measure Range: 0-50m
  • Name: Laser Methane Remote Detector

Packaging & Delivery

Packaging Details Special packing for LMRD Portable laser methane leak detector for natural gas leak detection
Delivery Time 3-6 weeks

Portable laser methane leak detector -LMRD 50


LMRD™ 50 is an ultra-light and ultra-high precision instrument that utilizes laser echo to telemetry
methane.The measurement principle is:The instrument emits a tunable laser with a wavelength of about
1650nm.Laser hit the measured surface, with the occurrence of diffuse reflection.Part of the diffuse reflection
of light is received by the same instrument.By analyzing the received signal,it can be found that the average
methane concentration in the path that the laser passed.
LMRD™ laser methane remote detector can accurately report the leakage of low concentration of indoor
methane gas 50 meters away.Its actual working situation (20meters away from the double glass) detection
limit can up to 10ppm*m.There is no false positives for indoor no leakage situation.
LMRD™ laser methane remote detector can detect the presence of air leaks in the room through the kitchen
glass,has high sensitivity.In the test of true 6000 users,our laser methane remote detector detects more than
10 households indoor gas leak.

Core components


Product name:LMRD™ Portable laser methane remote detector

Min. Resolution:5ppm*m

Distance detecting:50m

Response time:0.05s



When the laser beam points to the detection target such as gas pipes, walls,it will be reflected from the
target back to the scattered laser.If there is a methane gas between the laser methane remote detector and
the reflecting surface,infrared laser will be absorbed.The detector receives the reflected laser and measures
its absorption rate,in order to determine whether the leak has occurred.
LMRD™ laser methane remote detector uses methane gas to absorb specific wavelengths of infrared
light,the concentration of gas is calculated by measuring the degree of infrared light being absorbed.





Working Principle

Tunable Diode Laser

Absorption Spectroscopy (TDLAS)

Measurement Method

Laser Reflection



Detection Range(CH4)

0~50000 ppm*m

Measurement Accuracy


Response Time

0.1 s

Detection Distance

50 m


0.7 kg


160 mm*210 mm*80 mm


2.8 Inch LCD

False Alarm Rate


Operating Temperature


Operating Humidity

30~90%RH, Non-condensing

Enclosure Level

IP54 (Limited dust ingress protection, water spray protection)

Explosion Proof Classification

Exib IIA T3

Laser Classes

IR Laser: Class I eye safety
Green Indication Laser: Class 3R


Rechargeable Lithium battery, Capacity:3.7V 5200mAh

Threshold Alarm

Threshold: Can be set by customer  
Alarm: Buzz with LCD turning red


Built-in self test while turning on the instrument, <10s

System False Alarm

Corresponding error message while there is any
hardware issue



Field test




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