JCB-Cj158 methane detection alarm deviceDetailed product description：

Scope and Application
JCB-Cj158 methane detector (hereinafter referred to as the detector) is a new type of intelligent methane (gas) detection instrument that uses low-power carrier catalytic elements and integrated electronic technology. Adopting single-chip microcomputer intelligent control technology, it can quickly and accurately continuously monitor the gas concentration in the environment, and automatically alarm when the gas concentration exceeds the limit. Suitable for designated use in places with gas explosion hazards in coal mines, such as mining workfaces, return air tunnels, mechanical and electrical chambers, etc. It can also be used for mobile operations by leaders, ventilation management personnel, gas detectors, blasting personnel, underground team leaders, etc.
The detector can also be widely used in places with combustible gas explosion hazards such as gas stations. Monitor and control the concentration of flammable gases in the environment to prevent gas explosion accidents and ensure production safety.
The design and manufacture of the detector comply with the requirements of relevant standards such as GB3838.1~4-2000 "Electrical Equipment for Explosive Gas Environments" and GB13486-2000 "Portable Thermal Catalytic Methane Detection and Alarm Device"
Main functions
l、 Small size, light weight, and easy to carry.
The detector is 120mm high, 50mm wide, 20mm thick, and weighs less than 250g. The product has the smallest volume and is lightweight, and can be placed in a jacket pocket without affecting other work during use.
2. Electronic switch, safe and reliable, with a long service life. The power switch of the detector adopts conductive rubber switch technology, which not only solves the problem of poor contact of mechanical switches, but also improves the sealing performance of the detector, and has the advantages of reliable use and long service life.
3. Automatic protection of instruments
The detector is designed with the function of automatic shutdown due to battery undervoltage, which solves the problem of over discharge caused by failure to shut down in time and protects the battery from damage. After the detector is turned off, the overall power consumption of the machine is only a few microamperes.
4. The instrument adopts advanced single-chip microcomputer and SMD integrated circuit technology, with a reasonable circuit structure and novel design. The overall performance of the whole machine has reached the leading level in China.
5. The instrument has self checking and battery voltage display functions, making it easy to use.
6. The current of the instrument is less than 130mA during normal operation and less than 150mA during alarm.
Environmental conditions for use
1. Working temperature: 0 ℃~+40 ℃
3. Storage temperature: -40 ℃~+60 ℃
2. Relative humidity: ≤ 96%
4. Pneumatic pressure: 86~106KPa
Main technical parameters
1. Measurement range: 0.00~4.00% CH4
2. Measurement error: 0.00~1.00% CH4; ±0.10% ＞1.00％CH4； ± 10% of the true value
3. Response time: ＜ 30s
4. Display mode: Three digit display (with polarity display)
5. Over limit alarm function: (1) The alarm point detection range can be set arbitrarily (the product is set at 1.00% CH4 at the factory). (2) The alarm error shall not exceed ± 0.10CH4%.
(3) Alarm mode: red flashing and alarm sound.
6. Undervoltage protection function: When the working voltage of the battery is less than 3.0 volts, the working indicator light will turn off and the detector will automatically shut down.
7. Service life of catalytic components: more than one year.
8. Continuous working time for one charge: ≥ 9 hours.
9. Battery type: The battery pack consists of three GNY-1.4AH batteries and a current limiting resistor.
10. Battery life: The practical number of charge and discharge cycles is greater than 500 times.
11. Explosion proof type: mining explosion-proof and intrinsic safety type.
12. Explosion proof mark: Exd [ib] I.
13. Dimensions: 120 × 50 × 20 (mm)
14. Weight: 250 (grams)