Gas detector (DA-50 Series)

[Introduction] DA-50 detects various combustible & toxic gases leaked from industrial areas for gas producers, gas users, gas reservoirs, gas by-producers, and so on, in order to prevent any accidents in advance. DA-50 converts digital signal into the 4-20? standard current signal for output signal which can be transmitted to various external devices such as PLC, DDC, RECODER, and so on. Using these functions, you can easily construct the gas monitoring system more extensive as well as more comprehensive. DA-50 provides RS-485 communication signal and gas leakage alarm signal by relay contact output. Besides, DA-50 has DC 4-20mA standard output which realizes max 2500m long distance output signal transmission from sensor to receiver and RS-485 communication signal which realizes max 1000m long distance signal transmission. [Specification] Detection principle                                       Catalytic, electro-chemical, NDIR, or PIDGas sampling                                              DiffusionTarget gas                                                   Refer to the listDensity indication LCD display                       - PPM, %LEL, or %Response time                                             Within 20 seconds, 90% / full scaleAccuracy                                                     = ±2% / full scaleSensor calibration                                         Calibration with switchSensor parallax                                  Zero – = ±1% / 6 months, Span -= ±1% / 6 monthsUser programmable                           Calibration density, detection rangeInput power                                       DC 20 ~ 30VOutput power                                    4 ~ 20mA / full scale – maximum 2.5km                                                          long signal transmissionCommunication                                 RS-485 signal  with GasDNA’s own protocolOperating temperature and humidity    -20?~50?, 5~95% RH (non-condensing)Signal wire                                        CVVS & CVVSB 1.25sq x 3 wires - shield typeAlarm release                                    Manual or AutomaticMounting                                          Wall or pipe mountingHousing                                            PolycarbonateAlarm output                                      2 step- relay contacts (AL1/AL2)