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PRODUCT > DA-91

DA-91

DA-91

DA-91

Introduction
DA-91 is an audio-visual gas detector which can detect toxic gas and display its concentration on site. It 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.
Using these functions, you can easily construct the gas monitoring system more extensive as well as more comprehensive.
If the gas concentration is more than alarm set value, its light bar and buzzer will be automatically activated.
DA-91 provides RS-485 communication signal and alarm signals through relay contact output.
Features
Digital Processor
Digital processor based on built in micro processor realizes various artificial intelligent functions which result in more convenient, more accurate, and more efficient gas detection environment.
Self Diagnose
Digital processor automatically diagnoses the sensor signal and sends 2mA error signal output on the malfunction in the sensor.
FND display with Back Light
FND offers real-time display of gas density and back light offers easy reading in dark area.
User Programmable Menu
User programmable calibration density and detection rage offers user’s own operating functions.
Isolation Circuit
Built in isolation circuit prevents electrical noise and realizes the most stable sensor output.
Multi Signal Output
Various output signals - DC 4-20mA, 2 step-relay contact, & RS-485(option) – provides best networking with all kinds of devices & equipments.
Specification
Specification
Detection principle Electro-Chemical or Ndir or Catalytic
Response time With 10 seconds, 90% / full scale
Accuracy ≤ ±3%/Full Scale
Programmable Calibration density & detection range
Input power AC 220V/60Hz
Output power 4-20㎃/Full Scale – 2.5km Transmission
Alarm Low alarm - AL1 LED(RED)
High alarm - AL2 LED(RED)
Light bar - BZ LED(RED)
Alarm method Sight – Light bar
Hearing – Buzzer(90dB/1m)
Operation temperature & humidity -20℃ ~ 60℃, 5~95% RH (Non-Condensing)
Alarm release Manual and automatic release
Alarm output 2 step (AL1/AL2) alarm relay contact, RS-485 (option)
Mounting type Wall Mounting Type
Detection range PPM, %
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