AO-4A 4 in 1 Multi-Gas Detector

AO-4A

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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.

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