Gas detector DA-500 Series

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Product Detail Information

1> Introduction
DA-500 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-500 converts digital signal into the 4-20mA standard current output signal which can be transmitted to various devices such as PLC, DDC, or recorder to build comprehensive gas monitoring system. Also, DA-500 provides RS-485 communication signal and alarm relay contact. DC 4-20mA standard output signal realizes max 2500m long distance output signal transmission and RS-485 communication signal realizes max 1000m long distance signal transmission.


Specification

Detection principle                       Catalytic, Electro-Chemical, TCD or NDIR
Built-in display                             2-lines x 8-characters LCD with back light
Gas sampling                              Diffusion type
Target gas                                    Please refer to the target gas list.
Measurement range                     0 ~ 100 %LEL, 0~10,000ppm. 0~100% VOL
Response time                             Within 20 sec., 90% / full scale
Accuracy                                    ≤±2% / full scale
Sensor displacement                    Zero – ≤±2%LEL / 6 month, span -≤±2%LEL / 6 month
Input power                                  DC 20 ~ 30V
Output power                               4 ~ 20mA/Full Scale - 2.5km transmission
Operating temp.& humidity             -20℃~ 60℃, 5 ~ 95% RH (Non-condensing)
Signal cable                                CVVS & CVVSB 1.25sq x 3 wire - shield type
Wire conduit                                1/2" or 3/4" PF, NPT
Installation type                            Wall or Pipe Mounting
Exterior material                          Cast Aluminum Alloy
Explosion-proof                            Ex d IIC T5
Output                                         2 step- relay contact (ALARM-1/ALARM-2)
Communication output                 RS-485 communication output(option)
Sensor operation period                5 years (in air)
Sensor warranty period                1 year

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