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Multi-Gas Standalone Toxic Gas Detector

Product Literature

  • General Purpose or Non-Hazardous Application
  • Standalone Unit
  • Dual Controller / Dual Channel
  • LCD Display
  • 4-20 mA Output
  • Relay Contacts
  • 2 Alarm Set Points
  • Built-in Horn and Strobe
  • Operates on Standard 120 or 240 Volt Power Source

Keywords:  Toxic Gas Detector, Toxic Gas Monitor, H2S Detector, Hydrogen Sulfide Detector, NH3 Detector, Ammonia Detector, Chlorine Detector, Carbon Monoxide Detector


Features and Benefits

  • One-piece construction toxic gas detector for general purpose use
  • Maintenance free electrochemical cell sensing element in stainless steel housing
  • Can be equipped with any combination of sensors: toxic + oxygen sensors, or combustible + toxic sensors.
  • Dual controller with built-in relays to control external equipment
  • Operates on standard 120 or 240 volt power source
  • 4-20 mA output for optional connection to external equipment
  • User programmable LOW alarm and HIGH alarm set points
  • Voltage-free dry contacts for local control
  • Available two piece model allows for sensor to be located remotely
  • Digital readout of target gases
  • Pushbutton switch initiates “one-man” calibration sequence
  • Pushbutton switch to silence horn
  • Combination 105dB(A) high output alarm horn sounder & 5 joule xenon strobe
  • Shipped fully assembled and pre-calibrated
  • 5 Year Warranty
  • Made in USA
  • Typical applications include but not limited to laboratories, medical facilities, testing facilities, or semiconductor manufacturing

Product Summary

The SST Multi-gas Standalone Toxic Gas Detector is a custom built unit which includes two high reliability microprocessor based transmitter/controller, built-in sensors, relays , audible and visual alarm in a one-piece construction.  Unit can be configured with any combination of gas:  combustible + toxic, or toxic + oxygen.  For general purpose use.  5 Year Warranty.  Made in the U.S.A.


The SST Multi-Gas Standalone Toxic Gas Detector is a completely self-contained device that measures and displays the concentration gases present in a protected area, performs local control functions, and optionally transmits this information to a central control point. Two alarm relays and a fault relay are included for each controller.

Each SST NOVA-Sensor includes a high reliability microprocessor based transmitter/ controller in the associated housing. A digital readout continuously displays operating status and the actual concentration of gas. The transmitter converts this reading to a standard 4-20 mA signal. This signal may be connected to any remote device with a standard 4-20 mA input. The HIGH and LOW alarm relays operate at user adjustable alarm trip points; either relay may be set to operate above or below the normal oxygen level. The fault relay operates upon loss of power or internal failure of the unit. Relays are suitable for controlling local HVAC or equipment shutdown.

The automatic calibration sequence is easily completed by just one person. The microprocessor stores the results of the calibration in its permanent (non-volatile) memory for use in subsequent operation. There are no screwdriver or other manual adjustments required. During the calibration process, the 4-20 mA and relay outputs from the sensor are normally suppressed. The sensor automatically returns to normal operation when the calibration is complete. During calibration, the technician may optionally activate the built-in comprehensive input/output test sequence (Comp- Test™). During CompTest, the NOVASensor’s analog and relay outputs are not suppressed, thus providing a complete operational check of the overall system.

The unit is for general purpose use only and cannot be installed in a hazardous area.  However, the sensors can be remotely installed in a hazardous area.

Technical Specifications

Technical Specifications

Power Input: 85 to 264 volts AC, 47 to 440 Hz
Operating Temperature: -22 to + 131°F (-30 to +55°C)  |  Recommended storage +32°F to +68°F
Operating Humidity: 0 to 99% Relative Humidity non-condensing
Relay Outputs: Low alarm, High alarm
Configurable normally open or normally closed
Relay Contact Ratings: 6 amps @28 volts DC or 300 volts AC resistive  |  1/8 HP @ 120/240 volts AC
Analog Output: 0 to 20 mA current source into a load of 600 ohms or less
Warranty: 5 Years
Country of Origin: Made in USA
Size: 8 x 17 3/4 x 6 inches (200 x 450 x 152 mm)