GW 399
Multi-Channel Gas Warning System
Application
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.
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
Features
- 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, RS232 or RS485
- 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
Examples of measurable gases
| Gas |
Formula |
| Acetylen |
C2H2 |
| Ether |
C4H10O |
| Alcohol |
e.g. C2H6O |
| Ammonia |
NH3 |
| Petrol |
|
| Butane |
C4H10 |
| Chloroform |
CHCl3 |
| Hydrogen 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 |
Accessories
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: |
+14 °F to +104 °F |
| 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: |
115 V / 60 Hz |
| Optional: |
230 V / 50 Hz
24 V DC |
| Power consumption: |
8 VA |