Product description JJ5 + pump-priming oxygen detector equipped with imported electrochemical oxygen sensor, the oxygen content is space portable gas detection and alarm equipment a focus on the detection of air or closed. It has a high-definition LCD display and audible alarm and other functions, can guarantee in harsh working environments the oxygen content is detected, and prompt the operator to carry out prevention. Features comes with built-in suction pump, can be tens of meters from the outer gas inhalation instruments measured using imported sensor, detection sensitivity tall screen LCD display real-time data and the name of the gas and turn the display, batteries, sensors, sound and light alarm function self-test large-capacity rechargeable battery, a standard Mini USB charging interface superior sound, light alarm features available with data storage (optional): 1, high-capacity data storage space, can store 260 000 Data 2, convenient continuous switching operations segmented memory 3, professional visual data analysis software maintenance costs low with upper stainless steel probe gun, silicone catheter, chargers durable, easy to carry, use and flexible product features Detection of gas: oxygen (O2 ) Range: 0-30.0% Vol basic error: <± 3% (FS) Minimum reading: 0.1% Vol Response time: ≤15 seconds Sensor life: 24 months Sensor Type: Electrochemical Battery: 7.4V lithium-ion battery display : LCD Alarm: sound and light alarm Direct reading: instantaneous, peak, battery voltage, the minimum proof mark: Ex ibdIICT3 Protection class: IP45 Operating temperature: -10 ℃ ∽55 ℃ Operating humidity: 5% RH -90% RH Size: 130mm (length) × 80mm (width) × 112mm (H) Weight: 1.44kg (net weight) 3.54kg (including exploration gun, catheters, chargers, instrument package, box)