**Low-Concentration Methane Sensor Model: AZ-GJC4S**
**I. Overview**
The AZ-GJC4S low-concentration methane sensor is specifically designed for detecting methane levels in the air of underground coal mines. It provides a clear and accurate display of methane concentration on both the positive and negative sides, making it easier to install and operate in harsh underground environments. This intelligent inspection instrument allows all adjustments to be performed remotely using a control unit, eliminating the need for manual calibration or opening the device casing. With its high precision, stability, and reliability, the AZ-GJC4S is an essential tool for ensuring safety in mining operations.
**II. Main Technical Specifications**
2.1 **Measurement Range**: (0 ~ 4)% CHâ‚„
2.2 **Measurement Error**:
- 0.00 ~ 1.00% CH₄: ±0.10% CH₄
- 1.00 ~ 3.00% CH₄: ±10% of the true value
- 3.00 ~ 4.00% CH₄: ±0.30% CH₄
2.3 **Display Mode**: Four-digit digital display
2.4 **Environmental Conditions**:
- Ambient Temperature: (0 ~ 40)°C
- Relative Humidity: ≤98% at 25°C
- Atmospheric Pressure: (80 ~ 116) kPa
- Wind Speed: No more than 8 m/s
- Coal Dust Explosion Hazard Temperature: (-40 ~ 60)°C
2.5 **Power Supply**:
- Working Voltage: (9 ~ 24) V DC (Intrinsically Safe)
- Working Current: ≤80 mA
- Power-On Soft Start Function: Prevents excessive current surges during startup
- Remote Control Power Supply: 3V DC (two 1.5V dry batteries), Current: 9mA
2.6 **Explosion-Proof Type**: Mine intrinsically safe and flameproof type. The circuit part is intrinsically safe, while the catalytic component is explosion-proof.
2.7 **Explosion-Proof Marking**: Exibdl
2.8 **Cable Length**: Maximum of 2 km between the sensor and substation. Distributed capacitance is < 0.05 μF.
This advanced sensor ensures real-time monitoring of methane levels, helping prevent potential gas explosions and improving overall mine safety. It is ideal for use in various underground environments where gas detection is critical. For more details or to download the technical documentation, you can visit the official website of Beijing Heng Aode Instrument Co., Ltd.
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