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Gas monitor unit- MWS 903
The multi-channel gas warning equipment ADOS
MWS 903 continuously monitors the surrounding air and provides an early warning of dangerous, explosive and non-combustible gases and vapours.
It is possible to connect up to 8 gas transmitters
(2- or 3-wire) to the unit.
MWS 903 continuously monitors the surrounding air and provides an early warning of dangerous, explosive and non-combustible gases and vapours.
It is possible to connect up to 8 gas transmitters
(2- or 3-wire) to the unit.
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Examples of measurable gases
Technical Data
| Gas | Formula |
|---|---|
| Acetylene | 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 |
Technical Data
| Sensor inputs: | 8 two-or-three-wire sensors (e.g. LCTR 903) with current interface, 4–20 mA |
| Sensor supply: | 24 V= / 200 mA |
| Ranges: | CO 0-300 ppm NO2 0-30 ppm CH4 0-100 % UEG CO2 0-10 Vol % other ranges on request |
| Ambient temperature: | -10 °C to +40 °C |
| Digital inputs: | 1 input for siren cancel |
| Digital outputs: | max. 12 alarms 1 fault relay 1 siren relay Warning banner relay All outputs have floating change-over contacts, max. rating 250 V / 4 A |
| Standard output signals: | Analog output 4–20 mA serial interface RS 232 |
| Mains connection: | 230 V / 50 Hz 115 V / 60 Hz (optional) 24 V / DC (optional) |
| Dimensions (WxHxD): | 240 x 160 x 90 mm |
| Weight: | approx. 2 kg |
| Protection type: | IP 54 according to DIN 40050 |
- 6-section keybord and illuminated 4-line LC-Display for indicating actual values, half-hourly average values and fault messages, all clear text encoded
- Ready, fault and gas warning display
- Menu-assisted settings for the equipment parameters, via 6-section keyboard
- Two alarm thresholds for each sensor, independently adjustable from 5 % to 100 % of the measurement range; facility for forming half-hourly average value
- A maximum of 12 floating alarm outputs for controlling extra warning and control devices
- Floating change-over contacts for fault, siren and warning banners
- Serial interface output, RS 232 for connecting a printer or PC
- Plastic, wall-mounted housing (IP 54)
- 4–20 mA interface
- Plastic, wall-mounted housing
- High operational reliability
- Low current consumption
- Easy installation
- USP unit available
- Heating systems
- Garages and tunnels
- Liquid gas storage rooms
- Laboratories
- Cold-storage houses
- Plastic processing plants
- Chemical industries
- Paint manufacturing plants
- Concentration measurement of O2
- and many more
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