GW 399 | Ados Vietnam

Multi-Channel Gas Warning System
Nhà sản xuất: ADOS Vietnam

GW 399

Multi-Channel Gas Warning System

GW 399


The multi-channel gas warning system GW 399 continuously monitors the ambient air and provides an early warning of hazardous, explosive and non-combustible gases and vapours.



  • Use of various types of measurement sensor
  • Direct warning status recognition, via different colors of the LC-Display background illumination
  • Menu-aided operation, via 2 keys
  • Three alarm thresholds individually adjustable from 5-100% of test range
  • Three floating alarm outputs for driving additional warning and control systems
  • Floating relay contacts
  • Serial output, RS 232 or RS 485 LON®-interface
  • 4-20 mA current output
  • Different housings are available e. g. 19" rack, 
    panel mounting, wall-mounted housing
  • Up to 10 units per rack
  • 1 control unit configurable as master, for supervision of central alarms and communication control systems
  • High degree of reliability
  • Low current consumption
  • Possibility of uninterruptible power supply

Fields of Application

  • Monitoring of heating systems
  • Garages and tunnels
  • Liquid gas rooms
  • Laboratories
  • Cold storage houses and air conditioning plants
  • Plastic processing plants
  • Chemical industries
  • Paint manufacturing plants
  • Concentration measurement of O2
  • and many more

Measurable gases

Acetylen C2H2
Ether C4H10O
Alcohol e.g. C2H6O
Ammonia NH3
Butane C4H10
Chloroform CHCl3
Hydrogene chloride HCl
Helium He
Carbon dioxide CO2
Carbon monoxide CO
Methane (natural gas) CH4
Neon Ne
Propane C3H8
Oxygen O2
Carbon tetrachloride CCl4
Toluene C7H8
Hydrogen H2
Xylene C8H10


Signal horn, warning light, warning banner, ventilation control, test meters, plotter. 
Additional accessories are available, depending on the system ordered.


Technical Data

Details as for control unit
Sensors: Semiconductor sensor
Heat reaction sensor
Thermal conductivity sensor
Chemical sensor
Infrared sensor
Sensors input: 1 two-wire sensor (e. g. TOX 592) or 1 three-wire sensor (e.g. GTR 196)
Sensor supply: 20 V DC / 200 mA
Ranges: Adaptable by software
Accuracy: < 2 %, f.s.d.
Ambient temperature: -10 °C to +40 °C
Temperature effects: < 2 % for a ±20 °C change
Installation: Panel mounting or wall-mounting
Output signals: Current output 4-20 mA
RS 232 or RS 485 interface
3 Alarm relays
1 Fault relay
Relay rating: 230 V, 450 VA
other voltages on request
Voltage supply: 230 V, 50 Hz
Options: 115 V, 60 Hz  |  24 V DC  |  12 V DC
Power consumption: 8 VA


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