AO-4A 4 in 1 Multi-Gas Detector

AO-4A Portable gas detector with a large LCD screen.

It can monitor CO, H2S, O2 and combustible gas simultaneously.

The instrument has two instantaneous alarms with audio / visual and vibratory indicators, rechargeable battery and simple use.

Soundproof light and waterproof vibration-proof explosion-proof alarm.

1) Advanced MCU control with low power consumption
2) Adjustable low and high alarm level
3) Adjustable calibration level
4) High concentration protection for combustible gas
5) Self test for the fuel gas sensor
6) Low battery indication
7) Replaceable sensor module
8) Autotune function
9) Visual and audible alarm with vibration
10) STEL and TWA alarming for toxic gases
11) Advanced self-examination and self-renewal function
12) Password management to prevent malfunction
13) Explosion Proof Housing