Model Number: HFT-H201 Brand Name: Hua Fan Qin Lu Key Specifications/Special Features: Liquid crystal display gas detection transmitter, it is a kind of concentration of instrument that can continuous detect the concentration of oxygen, toxic and harmful gas in the working environmentDetector detects gas concentration with natural diffusion mode, which uses the imported sensors and has a good sensitivity and repeatabilityThis instrument uses the embedded micro-controller control technology, simple menu operation, complete functions and high reliabilityOur product uses process control, adjustable parameter, adjustable alarm point and adjustable alarm mode, convenient for usersCan be used alone as an alarm system with functions like: acquisition, display and alarm or it can be used as other parts of the alarm system testing, with digital and analog signal output functionWith a relay output module, our product can relay switch output signal and meet the explosion-proof lights or other external devicesDigital tube display with red high brightness and more intuitive scene show make it convenient to users to determine gas leak and effectively prevent the happening of the accidentBasic parameters:Size: 144 * 190 * 91mmWeight: about 1355g
Sensor types: electrochemistry method
(Combustible gas catalytic combustion type, special separately)
Destination gas: oxygen (O₂), gas (EX),poisonous and harmful gases (CO, H₂S, NH₃, CL₂)
Response time: ≤30s(O₂), ≤40s(CO) and ≤20s(EX)
Working pattern: continuous work
Working voltage: 24V DC
Output signal: 4-20mA, 485 digital signal
Output: three-wire system (LCD poison gas is two wire)
Control signal: switch output, the maximum load 250V AC/3A (optional)

Repeatability: <2%
Span drift: <5%
Error: value for relative error less than 5%
Temperature range: - 20 to 50°C
Humidity: 15%-90%RH (no condensation)
Connection mode: according to the instruction
Transmission cables:
Three-wire system adapts three core shielded cable 3 x 1.5mm² (digital tube transmitter)
Two wire adapts two core shielded cable 2 x 1.5 mm² (LCD transmitter)