... low alarm portable Product Overview: PG610-O2 oxygen gas detector uses electrochemical sensor, detecting OXYGEN. it monitors the ... We sell from manufacturer directly. PG610-O2 oxygen gas detector shell is nonskid, waterproof, dustproof and explosion-proof.Main ... × 60 mm × 24 mmStandard configuration: instrument box, gas detector, specifications, certificate of approval, warranty card, charger, gas hood ...