What Is a Telemeter?

Principle of methane telemeter: Hand-held methane detector emits a laser beam to the target, and then detects the deflected light reflected from the target, and then measures the methane concentration (ppm concentration-distance) between the detector and the target for high-concentration infrared absorption For measurement, the instrument uses the method of detecting the second harmonic of wavelength-modulated spectrometry, so it uses a near-infrared tuning diode (InGaAsP DFB laser) with a methane wavelength of 23-band R (3) ( = 1.6537 ).

Methane telemeter

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Principle of methane telemeter: Hand-held methane detector emits a laser beam to the target, and then detects the deflected light reflected from the target, and then measures the methane concentration (ppm concentration-distance) between the detector and the target for high-concentration infrared absorption For measurement, the instrument uses the method of detecting the second harmonic of wavelength-modulated spectrometry, so it uses a near-infrared tuning diode (InGaAsP DFB laser) with a methane wavelength of 23-band R (3) ( = 1.6537 ).

principle

The handheld methane detector emits a laser beam to the target, then detects the deflected light reflected from the target, and then measures the methane concentration (ppm concentration-distance) between the detector and the target. For high-concentration infrared absorption measurement, the instrument uses detection The second harmonic method of wavelength modulation and spectral splitting uses a near-infrared tuning diode (InGaAsP DFB laser) with a methane wavelength of 23-band R (3) ( = 1.6537 ).

The detector has a minimum detection sensitivity of 5 ppm-m and a distance of 30 meters when detecting targets with multiple reflections. In this mode, you can accurately find a gas leak of 10ml / min on exposed pipes in a long distance.

If the minimum sensitivity is 1000ppm-m, the measurement distance can be extended to 150 meters. In addition, if a retro reflector is used, the maximum measurement distance can reach 200 meters