Description Overview GAOTek Hydrogen Bromide Gas Sensor Detector with two/three wire TTL/0-20mA/RS485 output, integrates toxic gas sensor transmitter board. Adopting imported advanced electrochemical gas sensors, it has features of high accuracy, long lifetime, high stability and high anti-interference. The module is designed to prevent circuit reversed connection, high voltage, high current and lightning. Features Long lifetime imported advanced electrochemical sensors High accuracy op ams, power supply IC, stable and sensitive Detect low or high concentration toxic gases precisely High anti-interference ability Over range protection, reversed polarity protection and lightning protection Low power consumption with a standard 4-20mA two/three-wire signal output Technical Specifications Detected gas Toxic gas Detecting principle Electrochemistry Sampling Diffusing pump flange thread Responding time 30 s to 40 s (of the sensor) Module accuracy ≤ ± 3% FS (actual concentration, higher accuracy depends on specified sensors) Module repeatability ≤ ± 2% FS Module linear error ≤ ± 2% FS Module zero temperature drift ≤ ± 2% (FS/year) Module operating temperature -40 °F to 176 °F (-40 °C to 80 °C) Module humidity 0 RH to 95% RH (non-condensation) Sensor operating temperature -4 °F to 122 °F (-20 °C to 50 °C) Sensor humidity 0 RH to 90% RH (non-condensation) Signal output TTL/ 4-20mA / RS485 (two or three wire) Transmitting distance 3200 ft (1000 meters) (RS485) Operating voltage DC 12 V to 36 V Maximum power ≤ 0.8 W Size 3.14 in x 1.88 in (80 mm x 48 mm) Explosion proof Intrinsic safe Connection cable RVVP3 x 1.5mm²
