CD4 Portable Multi Parameter Tester (Multi Parameter Gas Detector)Detailed product description：

The CD4 portable multi parameter analyzer and multi parameter gas detector are electronic instruments that use electrochemical principles, carrier catalytic principles, infrared principles, embedded microcontroller intelligent control, and liquid crystal display. Mainly used for detecting and alarming methane, oxygen, carbon monoxide, and carbon dioxide.

CD4 portable multi parameter analyzer (multi parameter gas detector) operating environmental conditions:
Temperature: (0~40) ℃;
Humidity: ≤ 98%;
Atmospheric pressure: (80~116) kPa;
Wind speed: (0-8) m/s.

CD4 portable multi parameter analyzer (multi parameter gas detector) measurement range:
Methane: (0.00~4.00)% CH4.
Oxygen: (0.0~25.0)% O2.
Carbon monoxide: (0~1000) × 10-6 CO.
Carbon dioxide: (0.00~5.00)% CO2.

Basic error methane:
Basic measurement range error
0.00~1.00 ±0.10
± 10% of the true value from 1.00 to 3.00
＞3.00~4.00 ±0.30
Oxygen: not greater than ± 3.0% of the measurement range.
Carbon monoxide: (0~100) × 10-6 CO, not greater than ± (1.5+2.0%) true value
>When (100~500) × 10-6 CO, not greater than ± 4.0% true value
>When (500~1000) × 10-6 CO, not greater than ± 10.0% true value
Carbon dioxide: (0.00~1.00)% CO2, not exceeding ± 0.05% CO2
>When (1.00~5.00)% CO2 is present, it should not exceed ± 5% of the true value
4. Alarm point:
(1) Methane: freely set within the range of 0.50% to 2.50% CH4 (default setting at 1.00% CH4 at the factory);
(2) Oxygen: freely set within the range of 18.0% to 20.0% O2 (default setting at 18.0% O2 at the factory);
(3) Carbon monoxide: can be set arbitrarily within the measurement range (factory default set at 24 × 10-6 CO);
(4) Carbon dioxide: can be set arbitrarily within the measurement range (factory default set at 1.00% CO2).
5. CD4 portable multiparameter analyzer multiparameter gas detector alarm error:
(1) Methane: ± 0.05% CH4.
(2) Oxygen: ± 0.1% O2.
(3) Carbon monoxide: ± 1 × 10-6 CO.
(4) Carbon dioxide: ± 0.02% CO2.
6. Alarm method and effect: Sound alarm, located one meter away from the axis of the sound source, with a sound intensity of not less than 75dB.
7. Resolution:
(1) Methane: 0.01% CH4.
(2) Oxygen: 0.1% O2.
(3) Carbon monoxide: 1 × 10-6 CO.
(4) Carbon dioxide: 0.01% CO2.
8. Response time:
(1) Methane: not more than 20 seconds.
(2) Oxygen: not more than 20 seconds.
(3) Carbon monoxide: not exceeding 35 seconds.
(4) Carbon dioxide: not exceeding 40 seconds.
9. Continuous working hours:
Charging for more than 12 hours (new battery)
10. Using power supply:
The Ni MH 2100mAh/1.2V × 3 battery pack has a maximum short-circuit current of no more than 2.9 amperes. The working current is less than 150mA when there is no alarm, and less than 250mA when there is an alarm.
11. Dimensions: 135mm × 63mm × 24mm