GAS DNA DA-500 Series (explosion proof) SMART Gas Detector/Transmitter(4~20mA) with built-in LCD & explosion proof

Category: Gas Detector

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.

[ Features ]

Auto-calibration without opening cover
You only have to touch cover window using magnetic bar. It is quite useful for the corrective work in the explosive area.
LCD display with back light
Built-in HD(high dissolution) A/D converter for accurate output signal.
Multi signal output
DC 4-20mA, 2 step-relay contact, & RS-485(option) – provides best networking with all kinds of devices & equipments.
4-20mA transmitter
4-20mA output enables stable and long distance (maximum 2.5km) signal transmission.
RS-485 enables stables stable and long distance (maximum 1.2km) signal communication.
Alarm output
SPST 2 step relay contacts (AL1/AL2).

[ 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 seconds, 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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