The GD8 Multi-Parameter Mining Sensor is primarily used for detecting parameters such as gas in coal mines. It can simultaneously measure up to eight parameters, including methane, carbon monoxide, nitrogen dioxide, oxygen, ammonia, differential pressure, temperature, and humidity. As an intelligent detection instrument, this sensor is characterized by its stability, reliability, and ease of use. Functions such as zero adjustment, precision adjustment, and alarm point setting can be implemented via a remote controller. After being tested and certified by national explosion-proof inspection authorities, it can be integrated with coal mine safety monitoring systems.

• The gas detection module is independently encapsulated and can be disassembled and replaced as a whole, facilitating maintenance.
• Each parameter can be individually configured for its working mode.
• Equipped with a local 5-digit high-brightness red digital display and sound-light alarm functionality.
• Features Lora wireless transmission, as well as WIFI and Bluetooth wireless transmission capabilities.

• Measurement range and basic error
  

  Parameter	Measurement Range	Basic Error
  Methane (CH4)	(0.0~1.0)%CH4	±0.05%CH4
  	(1.00~100.0)%CH4	±5% of true value
  Carbon Monoxide (CO)	(0~100)×10⁻⁶CO	±4×10⁻⁶CO
  	(100~500)×10⁻⁶CO	±5% of true value
  Nitrogen Dioxide (NO2)	(0~20)×10⁻⁶NO2	±3×10⁻⁶NO2
  Ammonia (NH3)	(0~100)×10⁻⁶NH3	≤±5%FS
  Oxygen (O2)	(0.0~25.0)%O2	≤±3%FS
  Negative Pressure	(-5.0~0.0)kPa	±0.1kPa
  Positive Pressure	(0.0~5.0)kPa	±0.1kPa
  Temperature	(-10.0~70.0)℃	±1.0℃
  Humidity	(10~95)%RH	±5%RH

• Operating voltage: (9~25) V DC
• Operating current: ≤120mA
• Communication interface: RS485
• Explosion-proof type: Mining intrinsically safe type (Explosion-proof mark: Ex iaⅠMa)