The intelligent monitoring terminal for valve chambers consists of a high-precision optical methane sensor, a Hall-effect water level sensor, an omnidirectional micro-motion sensor, and an ultra-low-power computing core. Customized for gas valve chamber environments, it features an integrated waterproof design and is capable of monitoring methane concentration, water level status, and manhole cover open/close conditions within the valve chamber.

Technical Specifications

• Power Supply: 7.2V, 52Ah
• Sleep Current: 30μA
• Peak Operating Current: 2A
• Methane Sensor Type: High-humidity-resistant infrared probe / laser probe
• Methane Detection Resolution and Range (Infrared): 0.01%vol; 0–5%vol
• Methane Detection Resolution and Range (Laser): 0.1%LEL; 0–100%LEL
• Methane Sensor Accuracy (Infrared): 0–1%: ±0.06%; 1–5%: ±6% (Test conditions: 25°C, 50% RH)
• Methane Sensor Accuracy (Laser): ±3%LEL
• Manhole Cover Status Sensor: Switch-type
• Water Level Sensor Type: Switch-type
• Data Acquisition Frequency (Configurable): 1s – 24h
• Upload Frequency (Configurable): Typical value once per day
• Operating Temperature: -20°C – 60°C
• Operating Humidity: ≤99% (non-condensing)
• Network Mode: NB-IoT / 4G; Operational Life ≥3 years (depending on parameter settings)
• Ingress Protection Rating: IP68
• Explosion Protection Rating: Ex ib [ib Gb] II B T4 Gb

Features and Functions

1. Optical methane sensor with no poisoning effect, low power consumption, high accuracy, and fast response.
2. Innovative drawer-style wall-mounted bracket enables plug-in installation, significantly reducing equipment upgrade and maintenance costs.
3. Air-pressure-based waterproof compartment design ensures reliable waterproof performance without power loss.
4. Customized cloud-based monitoring platform supports multi-level alarm configuration and allows adding multiple SMS alert contacts.