WatchGas 404
1-4 CHANNEL GAS ALARM

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Applications

  • (Petro)chemical plants and factories
  • Tank storage parks
  • Sewage and wastewater treatment facilities
  • Mining industry
  • Construction sites
  • Governments/first responders
  • Food and beverage industry
  • Versatile System Configuration
  • Flammable, Oxygen, Refrigerant and Toxic Gases
  • 1 to 4 sensors
  • Plug in sensor channel cards
  • Two alarm stages
  • Selectable alarm relays
  • Analogue 4-20mA output
  • Delay to alarm option
Application Support

Product Details
Specifications
Downloads

The WatchGas 404 has been designed with features that provide an effective response to the detection of gas hazards in a wide range of environments, from commercial premises through to heavy industrial applications requiring hazardous area sensing. Typical monitor locations are public buildings, boiler plant rooms, swimming pools, water treatment works, H&V control systems, manufacturing and processing plants.

  • Versatile System Configuration
  • Flammable, Oxygen, Refrigerant and Toxic Gases
  • 1 to 4 sensors
  • Plug in sensor channel cards
  • Two alarm stages
  • Selectable alarm relays
  • Analogue 4-20mA output
  • Delay to alarm option
  • Remote catalytic flammable sensor option

Sensor points
1 ~ 4
Type
Infra-red, Electrochemical, Catalytic, Semiconductor, PID
Measurements
Combustible Gas - L.E.L., % vol, ppm
Toxic Gas - ppm, % vol
Oxygen - % vol
Depletion/Enrichment Any 4~20mA input signal
Power Supply
230/115v AC or 24v DC and specials
Power Consumption
12 watts - full alarm
Indicators
Power - Green L.E.D
• Mains Fail - power indicator change green to amber
• Alarms - Red L.E.D.s
• Fault - Amber L.E.D
• Digital Display - 31/2 Digit - gas readout
• Sensor channel selection indicator - Amber L.E.D
• System test - Alarm L.E.D.s flashing
• Alarm Relay Inhibit - Fault L.E.D on
Outputs
• Analogue output 4~20mA into 200 ohms max load
• Common Relays - user selectable
• High alarm RL2 - D.P.C.O. normally energised or de-energised - factory set de-energised
• Latched or unlatched - factory set latched
• Low alarm RL1 - D.P.C.O. normally energised or de-energised - factory set de-energised
• Latched or unlatched - factory set latched • Fault alarm RL3 - S.P.C.O. normally energised or de-energised - factory set de-energised
• Latched or unlatched - factory set latched • Global Alarm Relay RL4 - S.P.C.O. changes on all alarms and is resettable at all times.
Channel Relays
• High and low alarm S.P.C.O. normally energised or de-energised
• factory set de-energised
• Latched or unlatched - factory set latched
• All contacts rated 3A/230v AC