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SMART Gas Detector/Transmitter(4~20mA) with built-in LCD & explosion proof |
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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.
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[ Features ] |
 Auto-calibration without opening cover |
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You only have to touch cover window using magnetic bar. It is quite useful for the corrective work in the explosive area. |
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LCD display with back light |
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Built-in HD(high dissolution) A/D converter for accurate output signal. |
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Multi signal output |
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DC 4-20mA, 2 step-relay contact, & RS-485(option) – provides best networking with all kinds of devices & equipments. |
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4-20mA transmitter |
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4-20mA output enables stable and long distance (maximum 2.5km) signal transmission. |
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RS-485 |
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RS-485 enables stables stable and long distance (maximum 1.2km) signal communication. |
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Alarm output |
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SPST 2 step relay contacts (AL1/AL2). |
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[ Specification ] |
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Detection principle |
Catalytic, Electro-Chemical, TCD or NDIR |
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Built-in display |
2-lines x 8-characters LCD with back light |
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Gas sampling |
Diffusion type |
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Target gas |
Please refer to the target gas list. |
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Measurement range |
0 ~ 100 %LEL, 0~10,000ppm. 0~100% VOL |
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Response time |
within 20 seconds, 90%/full scale |
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Accuracy |
≤2% /full scale |
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Sensor displacement |
Zero – ≤±2%LEL / 6 month, span -≤±2%LEL / 6 month |
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Input power |
DC 20 ~ 30V |
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Output power |
4 ~ 20mA/Full Scale - 2.5km transmission |
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Operating temp.& humidity |
-20℃~ 60℃, 5 ~ 95% RH (Non-condensing) |
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Signal cable |
CVVS & CVVSB 1.25sq x 3 wire - shield type |
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Wire conduit |
1/2' or 3/4' PF, NPT |
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Installation type |
Wall or Pipe Mounting |
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Exterior material |
Cast Aluminum Alloy |
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Explosion-proof |
Ex d IIC T5 |
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Output |
2 step- relay contact (ALARM-1/ALARM-2) |
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Communication output |
RS-485 communication output(option) |
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Sensor operation period |
5 years (in air) |
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Sensor warranty period |
1 year |
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Malaysia
