Beijing Topsky Automatic Technology Co., Ltd
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Model:CD4X
Brand: TOPSKY
Application:
CD4X is used for testing CH4 (0-4%), CO2 (0-5%), CO (0-1000ppm), O2 (0-25%) at the same time. This instrument is reliable and easy to use. It is suitable for gas explosion and coal and gas outburst dangerous situations. You can hang it on coal mining working face and return air roadway.
Key Feature:
Display Mode: two lines, four digit, 2.3 inch red digital display tube,
You can see very clearly within 30 meters.
200-1000Hz Frequency and RS485 wire data transmission interface
2.4G wireless WIFI interface
Built-in pump, remote pumped sampling
Type of alarm: big decibels (not less than 80 db), high brightness
Calibration: Remote Control Calibration
Testing Range and Intrinsic Error
| Detecting Gas | Testing Range | |
| CH4 | (0.00～1.00)% CH4 | ±0.10％CH4 |
| (1.00～3.00)% CH4 | 10％ of truth-value | |
| (3.00～4.00)% CH4 | ±0.30％CH4 | |
| O2 | (0.0～5.0)% O2 | ±0.5% O2 |
| (>5.0～25.0)% O2 | ±3% FS | |
| CO | (0～20)×10-6 CO | ±2×10-6 CO |
| (>20～100)×10-6 CO | ±4×10-6 CO | |
| (>100～500)×10-6 CO | ||
| (>500～1000)×10-6 CO | ||
| CO2 | (0.00～0.50)% CO2 | ±0.1%CO2 |
| (0.50～5.0)% CO2 | ±(0.05 ＋ 5% of truth-value) |
