MWS 906
Multi-Channel Gas Warning System
Application
The multi-channel gas warning unit MWS 906
continuously monitors the ambient air and issues an
early warning of gases and vapours that are dangerous
to health, or when there is a danger of explosion, for
non-combustible gases and vapours.
Fields of Application
Monitoring of:
- Heating systems
- Garages and tunnels
- Liquid gas storage plants
- Laboratories
- Cold-storage depots
- Plastic processing workshops
- Chemical industries
- Paint varnish manufacturers
- Concentration measurement of O2
- and many more
Features
- 6-section keyboard and backlit 4-line LC-display for displaying actual values, half-hourly average values and fault messages in cleartext
- Ready for operation, fault and gas warning indicators
- Menu-assisted adjustment of equipment parameters via 6-section keyboard
- Three alarm thresholds for each sensor, indepen-
dently adjustable from 5-100% of the measurement range, also possible to from half-hourly average values
- A maximum of 48 floating outputs for driving additional warning and control devices
- Floating change-over contact for faults, sirens and warning banners
- Serial output RS 232, for connecting a printer or PC
- 4-20 mA current interface as output signal
- Plastic, wall-mounting housing (IP 54)
- High degree of service reliability
- Low power consumption
- Easy installation
- Un-interruptible power supply (UPS) can be used
Examples of measurable gases
| Gas |
Formula |
| Acetylene |
C2H2 |
| Ether |
C4H10O |
| Alcohol |
e.g. C2H6O |
| Ammonia |
NH3 |
| Petrol |
|
| Butane |
C4H10 |
| Hydrogen chloride |
HCl |
| Helium |
He |
| Carbon dioxide |
CO2 |
| Carbon monoxide |
CO |
| Methane (natural gas) |
CH4 |
| Neon |
Ne |
| Propane |
C3H8 |
| Oxygen |
O2 |
| Toluene |
C7H8 |
| Hydrogen |
H2 |
| Xylene |
C8H10 |
Technical Data
| Sensor inputs: |
16 two- or three-line sensors (e.g. ADOS GTR 196) with current interface 4 – 20mA |
| Sensor supply: |
24 V= / 100 mA |
| Measurement ranges: |
CH4 0 – 100 % LEL
LPG 0 – 100 % LEL
H2 0 – 100 % LEL
NH3 0 – 1000 ppm
CO2 0 – 4 Vol %
CO 0 – 300 ppm
NO2 0 – 30 ppm
O2 0 – 25 Vol %
further ranges on request |
| Digital inputs: |
1 input for cancelling the horn (siren) |
| Digital outputs: |
max. 48 relays for alarms
1 fault relay
1 horn relay
1 warning banner relay
All outputs are floating change-over contacts rated at max. 250 V/4 A |
| Standard output signals: |
Analog output 4 – 20 mA
Serial interface RS 232 |
| Voltage supply: |
230 V / 50 Hz
115 V / 60 Hz (optional)
24 V / DC (optional) |
| Power consumption: |
max. 60 VA |
| Ambient temperature: |
-10 °C to +45 °C |
| Dimensions (WxHxD): |
390 x 270 x 160 mm |
| Weight: |
approx. 5 kg |
| Protection type: |
IP 54 to DIN 40050 |
Accessories
Signal horn, warning lights, warning banner, plotter,
stand-by power supply unit UPS 2000 24 V.
Further accessories will be available, according to the
proposed measurement tasks.