Model Number: HFM302 Brand Name: HuaFanQinLu Key Specifications/Special Features: Our product has widely used in detecting toxic and harmful gas or oxygen content detection in metallurgy, chemical industry, petroleum, pharmaceutical, environmental industries and other work environment with imported sensors, high precision and strong anti-interference ability, long service life.Intelligent sound and light alarm designSimple operation, easy calibrationZero and alarm settingsCan be output relaycontrol signalMetal shellSolid and durableEasy to install. Size 380mm*210mm*83mm Weight 2.5kg Output voltage DC24V(over-current protection function) Working voltage AC220V 50HZ The number of channels 1 or 2 road Display mode direct display Signal input 4-20 mA The control output AC250V DC30V 10A(relay switch output) Connection mode Two wire,three wire system 4-20mA current signal of the transmitter or four wire bus transmitter Response time <8 seconds Output control 1-2 road alarm control relay output Temperature range -10°C-50°C Humdity 15%-70%(no condensation) Installation method wall-mounted installation