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PRODUCT > DA-750-VOC

PRODUCT

DA-750-VOC

DA-750

DA-750-VOC

Introduction
DA-750-VOC 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
Auto-Suction Type
Built-in micro pump suctions gas continuously which is effective gas sampling especially for closed area.
LCD Display with Back-Light
LCD offers real-time display of gas density and back light offers easy reading even in dark area.
Isolation Circuit
Built-in isolation circuit prevents electrical noise to secure stable sensor operation.
4-20mA Transmitter
4-20mA output enables stable and long distance (maximum 2.5km) signal transmission.
RS-485
RS-485 enables stables stable and long distance (maximum 1.2km) signal communication.
Alarm output
SPST 2 step relay contacts (AL1/AL2).
Specification
Specification
Detection principle NDIR (Nondispersive infrared)
Gas sampling Suction Type
Input power DC 20V~30V (24 V DC Normal) / 250mA (Max.)
Sample gas volume 0.2 l/min ~ 2.5 l/min
Accuracy ≤ ±2%/Full Scale
Output signal 4-20㎃ DC/F.S
Density indication LCD Display - PPM, %LEL, %vol, or PPb
Alarm AL1 Alarm - LOW LED(RED)
AL2 Alarm - HIGH LED(RED)
Setting of alarm value AL1/AL2 2 stages Alarm-User can optionally set.
Alarm delay time 0~99seconds with user adjustable
Alarm clearing Manually or automatically
Alarm output 2 step alarm relay contact (AL1/AL2)
Operating temperature & humidity -20℃ ~ 50℃, 5% ~ 95% RH (Non-condensing)
How to install Wall Mounting Type
Signal cable CVVS & CVVSB 1.5sp*3 Wire-Shield Type
Gas inhaling 6Ø Tube”
Output option RS-485
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