JCB4 Portable methane detection and alarm deviceDetailed product description：

JCB4 portable methane detection and alarm device is a new type of methane detection and alarm device launched by our company. It is a mining intrinsic safety portable detection and alarm device, and its performance is executed according to the national standard AQ6207-2007. Suitable for underground coal mines and working environments with methane gas explosion hazards, it can automatically and continuously detect the methane concentration in the surrounding gas. When the methane concentration exceeds the limit, it will emit sound and light alarm signals. Suitable for mobile operations such as underground coal mine management personnel, ventilation management personnel, and blasting personnel to carry with them; It can also be used in fixed places such as coal mine tunnels, mining workfaces, and mechanical and electrical chambers.

The main features of JCB4 portable methane detection alarm are:
1. It adopts the latest microprocessor chip from Microchip Corporation in the United States, which has super powerful internal functions (such as built-in E2ROM, clock circuit, watchdog, A/D conversion, etc.), and only requires a small number of peripheral components to achieve all the functions of the methane detection alarm.
Therefore, the circuit board structure of the instrument is simple and small in size, greatly reducing the instrument's failure rate.
2. It has time display (clock) function, battery voltage display, undervoltage prompt, undervoltage automatic shutdown, and cumulative working days display after each calibration of the instrument.
When the instrument is used underground in a coal mine, pressing the "calibration" button only displays time and battery voltage. The calibration of the instrument can only be achieved when charging on the ground and pressing the "calibration" button after turning on the device. Avoiding misoperation during underground use of the instrument.
4. Under normal conditions, hold down the "calibration" button and then press the "zero adjustment" button to achieve the self-test function of the instrument. Press the 'Zero' button to display the cumulative working days.
5. The alarm device should have the function of over limit protection for the catalytic element of the carrier, and maintain the displayed value in the over limit state.
When the alarm is charging, it has functions such as charging red light indication, charging completion shutdown, and green light indication.

Technical parameters of JCB4 portable methane detection alarm:
1. Measurement range: 0-4% CH4
2. Basic error: When 0-1% CH4, ≤± 0.1% CH4
When 1-2% CH4, ≤± 0.2% CH4; When 2-4% CH4, ≤± 0.3% CH4
3. Resolution: 0.01% CH4
4. Alarm point: 1.00% CH4 (adjustable from 0.5-2.5)
5. Response time: less than 30 seconds
6. Power supply: Nickel hydrogen battery pack GNY1.8AHx3
7. Alarm method: Sound and light alarm (police car sound); Intensity greater than 80db
8. Zero drift: ≤± 0.04% CH4 (continuous operation for 8 hours)
9. Continuous working time of more than 11 hours on a single charge
10. Battery voltage measurement error: ≤± 0.2V
11. Working mode: diffusion type
12. Explosion proof type: IBDI (mining intrinsic safety and explosion-proof type)
13. Protection performance: IP54
14. Dimensions: 90mm x 48mm x 19mm
15. Weight: less than 200g