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Gas monitor unit- GW399

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.

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Measurable gases

Gas	Formula
Acetylen	C₂H₂
Ether	C₄H₁₀O
Alcohol	e.g. C₂H₆O
Ammonia	NH₃
Petrol
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

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 LON^®-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

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

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

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