DA-750 detects leakage of various toxic or combustible 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. Built-in micro pump suctions gas continuously which is effective gas sampling especially for closed area. DA-750 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 to construct the gas monitoring system more extensive as well as more comprehensive. DA-750 provides RS-485 communication signal and gas leakage alarm signal by relay contact output. Besides, DA-750 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.
[ Features ]
ㆍ Auto-Suction Type
Built-in micro pump suctions gas continuously which is effective gas sampling especially for closed area.
ㆍ LCD Display with Back-Light
Isolation Circuit
ㆍBuilt-in isolation circuit prevents electrical noise to secure stable sensor operation.
ㆍ 4-20mA Transmitter
4-20mA output enables stable and long distance (maximum 2.5km) signal transmission.
ㆍ RS-485
RS-485 enables stables stable and long distance (maximum 1.2km) signal communication.
ㆍ Alarm output
SPST 2 step relay contacts (AL1/AL2).
[ Specification ]
| Detection principle | Catalytic, electro-chemical, NDIR, or PID |
| Gas sampling | Suction Type |
| Input power | DC 20~24V |
| Sample gas volume | 1.0 Liter/min ~ 2.5 Liter/min |
| Accuracy | ≤2% /full scale |
| Output signal | DC 4-20㎃ / full scale |
| Memory | 4,000 records |
| Density indication | LCD Display - PPM, %LEL, %, or PPb |
| Alarm | AL1 Alarm – AL1 LED (RED) AL2 Alarm – AL2 LED (RED) |
| Setting of alarm value | AL1/AL2 2stages Alarm-User can optionally set. |
| Alarm delay time | 0~99 seconds with user adjustable |
| Alarm clearing | Manually or automatically |
| Alarm output | 2 step alarm relay contact (AL1/AL2) |
| Operating temperature | -10℃ ~ 50℃ |
| Operating humidity | 5 ~ 95%RH (Non-Condensing) |
| How to install | Wall Mounting Type |
| Signal cable | CVVS & CVVSB 1.25sp*3 Wire-Shield Type |
| Gas inhaling | 6Ø Tube |
| Output option | RS-485 |
