18 Years Factory Face Visor - Infrared CH4 meter GJH4(A) – Topsky
18 Years Factory Face Visor - Infrared CH4 meter GJH4(A) – Topsky Detail:
Application:
GJH4 (A) Infrared CH4 Meter can continuously and automatically convert down hole CH4 concentration into a standard electrical signal and then transmit to the matching equipments. It can show the concentration of methane in situ and it has the function of transfinite audible and visual alarm. It can connect with monitoring system, breaker and wind power gas lock instruments. It is widely used in the field of coal mining working face, electrical and mechanical cavern and return air roadway.
Key Feature:
1.It adopts new type single chip microcomputer and high integration digital circuit. Then the circuit structure is simple. Performance is reliable. Easy to maintenance and debugging.
2.It has the function of Infrared remote calibration zero, sensitivity and emergency alarm. It is simple and convenient to calibrating.
3.The sensor has extra function of cutting off control. You can set cutting off point arbitrarily. It has a multi-usage function.
4.Using new type of switching power, reduce the power consumption of the engine, increase the transmission distance of the instrument.
5.Self-diagnostic function, easy to use and maintain.
6.Newly high-strength shell structure, enhance the impact resistance of the instrument.
Technical Specification:
Testing Range |
0.00%CH4~4.0%CH4 |
Environment Temperature |
0°C~40°C |
Relative Humidity |
≤98%RH |
Atmosphere Pressure |
80kPa~116kPa |
Wind Speed |
0m/s~8m/s |
Frequency |
200Hz~1000Hz |
Current |
1mA .DC~5mA .DC |
Response Speed |
≤20S |
infrared component life |
5 years |
soundintensity |
≥85dB |
Dimension |
270mm× 155 mm× 55mm |
Weight |
≤1.3kg |
Product detail pictures:

Related Product Guide:
We are going to dedicate ourselves to providing our esteemed buyers together with the most enthusiastically thoughtful products and services for 18 Years Factory Face Visor - Infrared CH4 meter GJH4(A) – Topsky , The product will supply to all over the world, such as: Kuwait, Guyana, Juventus, Our products are produced with the best raw materials. Every moment, we constantly improve the production programme. In order to ensure better quality and service, we have been focusing on the production process. We have got high praise by partner. We are looking forward to establishing business relationship with you.

We have worked with many companies, but this time is the best,detailed explanation, timely delivery and quality qualified, nice!
