Universal Fixed Gas Detector

Universal Fixed Gas Detector

Item #: 99030


Product Summary

The PureAire Universal Fixed Gas Detector is ideal for facilities requiring continuous monitoring for corrosive and toxic gases. The gas detector is designed to be connected to a dedicated, renewable toxic gas sensor, which is programmed for a specific type of gas in parts-per-million (ppm). This gas detector is well suited for environments such as laboratories, hospitals, food refrigeration, pharmaceutical manufacturers, and, for any industry applications where toxic, corrosive gases including, but not limited to, ammonia, HF, hydrogen, HCL, bromine, chlorine, sulfur dioxide are used. PureAire’s renewable, long-life sensors will last up to 8 years in a normal environment and can be recharged with electrolyte on the user’s own site. For more information, please see What is a Gas detector?


Fixed Toxic Gas Detector
  • Transmitter connects to any PureAire toxic or corrosive gas sensor
  • Plug & play sensor sets the transmitter gas & measurement range
  • Dual-level user-adjustable alarm relays
  • 4-20mA analog output (Active)
  • Built-in horn & visual alarm LEDs
  • Electronics continuously check sensor & systems status
  • Low-cost, long-life renewable sensor
  • Quick, easy sensor calibration
  • Optional remote cable for monitoring up to 30 feet from the transmitter
  • Connects to PLC or SCADA controller
  • UL, CUL, and CE Approvals
  • 24V DC Power supply included

The PureAire Universal Gas Detector is a compact gas monitor that’s ideal for protecting workers from toxic and corrosive gas exposures in the workplace. It consists of a generic transmitter/controller connected to a dedicated, renewable gas sensor that automatically inputs the gas and measurement range. Designed as a stand-alone monitor, the Universal Gas Detector can also be connected to any programmable logic controller or SCADA system. PureAire also manufactures toxic gas detectors with a remote sensor. 

The heart of the system is a smart renewable sensor cell programmed with specific gas and measurement range information. Simply plug the sensor into any Universal Gas Detector transmitter, and it’s ready to go. When servicing the sensors, they can be recharged with fresh electrolyte and dynamically gas-calibrated in the maintenance shop away from the transmitter.


Sampling Method Diffusion. (Optional: sensor can be remote up to 30 feet from the transmitter)
Available Gases ammonia, bromine, chlorine, fluorine, hydrogen bromide, hydrogen chloride, hydrogen cyanide, hydrogen fluoride, hydrides, hydrazine, nitrogen dioxide, phosphine, and sulfur dioxide. Other gases are available; consult PureAire.
Accuracy ± 10% of full scale
Operating Temperature -25 to +122F (-32 to +50C)
Sensor Type Renewable electrochemical self-checking sensor with built-in microprocessor
Sensor Life 3 to 8 years under normal conditions
Gas concentration indicator Built-in LCD digital display, (backlit) Displays: Gas Name & ppm concentration, AL1, AL 2, System Fault messages.
Signal Outputs 4-20 mA analog output (Active), Dual Level Alarm Relay Contacts
Power Requirements 24 VDC, .25 amp Regulated power supply required
Dimensions 5.5 (W) x 10.5 (H) x 3.25 (D) inches; (140 x 267 x 83 mm)
Weight 1.2 lbs. (.5 kg)
Enclosure Polycarbonate UL listed general-purpose Optional NEMA 4X, IP 65 water-resistant, (only available without built-in horn)
Country of Origin USA
Harmonized Tariff Code 8531.10.0045

Low Annual Operation Cost

The Universal Gas Detector has the lowest annual maintenance costs of any gas monitoring system on the market. PureAire Renewable sensors are easily recharged with electrolyte right in the field at approximately 20% of the cost of disposable sensor cell type systems. Routine maintenance materials are $70 per year and when compared to the high cost of disposable sensors, can save you hundreds of dollars in annual service!

Stand-Alone Monitoring

The Universal Gas Detector is designed to operate totally stand-alone. Just mount it to the wall near the risk site and plug in the wall wart regulated power supply into any 115VAC 60 Hz outlet or 220VAC 50 Hz outlet and you’re up and monitoring. The built-in horn and LED alarm indicators quickly alert personnel to a hazardous condition. It also has individual alarm and fault relays for connecting remote alarms or control and the analog 4-20mA output provides continuous data to remote PLC and SCADA systems.

Continually supervised electronics

The Universal Gas Detector detectors “smart” circuitry is continuously supervised 24-7 and should a system error occur, the detector’s analog output and fault relay immediately alert control room personnel to the problem. A dedicated microcontroller built directly into the sensor allows you to remove from it the transmitter for all routine calibration and maintenance. Calibration data is directly entered into the sensor electronics and then transferred to the transmitter once it’s plugged in.

Universal Gas Detector Literature

Universal Gas Detector Manual

Comparison PMS vs Disposable 1 pt

List of Gases We Can Detect

Calibration Cap for Gas Sensors


Bulk Head Mount


Horn & Strobe


8-Channel Programmable Controller for Oxygen, Carbon Dioxide, or Toxic/Combustible Gas Monitors