Technical features:
* 4-20mA, 3 wire connection ,compatible with existing alarm control unit or DCS
 (Distributed Control System)
* Flameproof body design acc. to IEC61508,simple and easy installation and maintenance.
* Multi-parameter backlight LCD display: measuring range,digital gas reading ,units, bar graph ,
  system status etc.
* International standard plug-in sensor, Plug and Play! .
* Sensor replacement without recalibration, automatic sensor data recognition. Sensor fault
  signal output monitoring and indicating.
* Programmable alarm operation value, low or high level alarm indication.
* Three-key operation for on-site configuration and maintenance.
* PC programmable software for online configuration and maintenance.
* PDA programmable software for configuration and maintenance on-site,field or remote
  operation separate from the control units.
* Automatic temperature compensation ensure the correct measurement.

Thchnical data:
* Power supply:    24VDC (10.5 ~ 45 VDC)
* Linear output signal:   4~22.8mA with superimposed communication signal for HART protocol
* Failure signal:   3.6mA
* T90 response time:   ＜30 sec
* Resume time:  ＜35 sec
* Resolution:   1 uA
* Accuracy:   ±3%F.S.; ±1%F.S. (On request)
* Display :   backlight LCD, LED
* Backlight LCD display :   5-digit gas reading
                                                50 bar graph display 0-100% full scale"
* Unit:   ppm, mA, %,%LEL,%VOL
* Operating temperature: -40~70℃ (According to gas sensor operating conditions)
* Humidity: 10-95%RH (non condensing)
* Ex-protection: Exd IIC T6 (Flame-proof Type)
* Electronic housing: Die-cast aluminium explosion-proof housing
* Accessories material: Aluminium for O2、CO and combustible gas. Stainless steel for others. * IP rating: Ip66