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The Series GSTA Carbon Monoxide/Nitrogen Dioxide Transmitters monitor the gas concentration in underground parking garages and loading docks. Carbon monoxide is commonly used to measure the exhaust of gasoline engines, while nitrogen dioxide is used for diesel engines. Field selectable current and voltage outputs allow the transmitter to be used with almost any building management controller. For carbon monoxide units, the user can select the output range to be from 0 to 50 ppm or up to 0 to 500 ppm. Nitrogen dioxide units come with a standard 0 to 10 ppm range. The output can be inverted to read 20 to 4 mA or 10 (5) to 0 VDC using internal dip switches.

To maximize the accuracy of the Series GSTA, the sensor can be field-calibrated using the A-449 remote LCD display. When the sensor reaches the end of its life, the display will indicate that the sensor needs to be replaced.

Product Applications

• Garage or loading dock ventilation
• Mechanical room monitoring

Features

• Add optional integral LCD display by adding -LCD to end of model number (Example: GSTA-C-LCD)
• Industrial grade replaceable CO or NO2 sensors
• Field selectable current or voltage output on GSTA models
• Service display tool for set-up and calibration of models without a LCD

Specifications

• High Accuracy Electrochemical Sensor, Universal Output or BACnet or Modbus® Communication Protocol Options
• Range: NO2 : 10 PPM; GSTA CO: Switch selectable 200 or 500 PPM; GSTC CO: 500 PPM.
• Accuracy : CO: 2% FS, NO2: 3% FS
• Temperature Limits : -4 to 122°F (-20 to 50°C).
• Humidity Limits : 15 to 90% RH constant; 0 to 99% RH intermittent.
• Output Signals : GSTA: 4-20 mA, 0-5 V, 0-10 V BACnet MS/TP and Modbus RTU
• Power Requirements : 10-36 VDC or 15-29 VAC
• Enclosure Rating : IP64.

Models & Ordering