The valve well online monitoring equipment consists of high-precision optical methane sensors, Hall-type water level sensors, gimbaled micro-sensors and ultra-low-power computing centers. It is customized to fit the environment of gas valve wells and adopts the waterproof design of the whole machine. It can monitor the methane gas concentration, water level status, and well cover opening and closing status in the valve well.

Technical specifications

• Power supply 7.2V, 52Ah
• Sleep current 30μA
• Peak current 2A
• Methane Gas Sensor Type High Humidity Resistant Infrared Probe/Laser Probe
• Methane gas detection resolution and range (infrared) 0.01%vol;0～5%vol
• Methane gas detection resolution and range (laser) 0.1%LEL; 0 ~ 100%LEL
• Methane gas sensor accuracy (infrared) 0 ~ 1%: ± 0.06%; 1 ~ 5%: ± 6% (test environment: 25 ℃ 50%RH)
• Methane gas sensor accuracy (laser) ±3%LEL
• Manhole cover opening and closing sensor Switching type
• Water level sensor type Switching type
• Acquisition frequency (settable) 1s ～ 24h
• Upload Frequency (Settable) Typical 1 day/time
• Operating temperature -20℃ ～ 60℃
• Operating humidity ≤99% (non-condensing)
• Network Mode NB-IoT / 4G Operating Hours ≧3 years (depending on the parameter setting value)
• Waterproof and dustproof grade IP68
• Explosion-proof grade Ex ib [ib Gb] ⅡB T4 Gb

Functions and Features

1. Optical methane sensor, no poisoning reaction, low power consumption, high accuracy, fast response speed.
2. Innovative drawer type wall mounting bracket, extractable installation, greatly reducing equipment upgrade and maintenance costs.
3. Pneumatic waterproof compartment design, no power loss, reliable waterproof performance.
4. Customized cloud-based monitoring platform, can set up hierarchical alarms, add multiple sets of SMS alarm contacts.