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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.

Technical data

Examples of measurable gases


GasFormula
AcetyleneC2H2
EtherC4H10O
Alcohole.g.C2H6O
AmmoniaNH3
Petrol
ButaneC4H10
ChloroformCHCl3
Hydrogen chlorideHCl
HeliumHe
Carbon dioxideCO2
Carbon monoxideCO
Methane (natural gas)CH4  
NeonNe
PropaneC3H8
OxygenO2
Carbon tetrachlorideCCl4
TolueneC7H8
HydrogenH2
XyleneC8H10


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

        

Features

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

Application
  • 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

Gas monitoring
Contact Us

0755 - 8618 3901

info@onuee.com

(0755) 8618 3040

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