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The ZW-G200 Remote Laser Methane Detector is a handheld gas inspection instrument designed for locating potential methane leaks from a distance. Based on Tunable Diode Laser Absorption Spectroscopy (TDLAS), it provides non-contact measurement of methane along an optical path, making it suitable for gas infrastructure inspection and industrial leak surveys.

The detector incorporates laser transmission and receiving components within a compact housing. During operation, the laser beam is directed toward a reflective target, and the returned optical signal is processed to calculate path-integrated methane concentration.

With a maximum detection distance of 200 meters, depending on configuration and measurement conditions, the ZW-G200 enables operators to examine pipelines, elevated facilities and remote gas installations without placing a sampling probe directly at the suspected leakage point.

The instrument also features adjustable alarm thresholds, a color LCD display and audible, visual and vibration alerts. Its rechargeable 5000 mAh lithium-ion battery supports more than 10 hours of operation, making it suitable for extended inspection activities.

• Remote methane measurement using TDLAS laser technology.

• Maximum detection distance of 200 m.

• Available measuring distances of 50, 100, 150 and 200 meters.

• Methane measurement range of 0–65,535 ppm·m.

• High measurement resolution of 1 ppm·m.

• Fast response time of 0.01 second.

• Measurement accuracy specified as ±5%.

• Laser-based detection without direct gas sampling.

• Integrated optical transmitter and receiver.

• Color LCD display with numerical and curve indications.

• Configurable low and high alarm thresholds.

• Audible, visual and vibration alarm functions.

• Aiming scope activates automatically when the instrument is switched on.

• Designed to reduce routine calibration requirements.

• Sensor service life of approximately 5–10 years.

• IP65 protection for industrial field use.

• Rechargeable 5000 mAh lithium-ion battery.

• More than 10 hours of operating time.

• Portable construction with a weight of approximately 750 g.

The ZW-G200 is suitable for methane leak inspection in:

• Natural gas pipelines

• Gas transmission facilities

• Petroleum and gas production

• Natural gas storage stations

• Petrochemical installations

• Industrial gas distribution networks

• Refinery gas equipment

• Elevated pipeline assemblies

• Gas processing facilities

• Industrial methane safety surveys

The ZW-G200 uses the characteristic optical absorption properties of methane. The laser signal travels toward a reflective target and returns to the receiver, where absorption information is analyzed to calculate the integrated concentration along the beam path.

The measurement result is expressed in ppm·m, representing gas concentration integrated over distance rather than a conventional single-point ppm reading.

The ZW-G200 combines long-range optical measurement, rapid methane detection, configurable alarm functions and extended battery operation in one handheld device.

Its remote detection capability makes it particularly suitable for inspecting elevated, distant or difficult-to-access methane handling equipment while reducing the need for close-range gas sampling.