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CO2, Temperature and Humidity Transmitter Series GMW90

CO2, Temperature and Humidity Transmitter Series GMW90
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CO2, Temperature and Humidity Transmitter Series GMW90 - 1

GMW90 Series Carbon Dioxide, Temperature, and Humidity Transmittersfor Demand Controlled Ventilation Applications Features • Measured parameters: carbon dioxide, temperature, and humidity (optional) • Superior long-term stability with the next generation Vaisala CARBOCAP® sensor • Accurate temperature and humidity measurements due to the low-power microglow infrared source • Quick and easy installation and maintenance • Calibrated, user-exchangeable measurement modules • 3-point traceable CO2 calibration (certification included) • Both analog and digital communication (BACnet®/ Modbus®) GMW90 Series CARBOCAP® Carbon Dioxide, Temperature, and Humidity Transmitters are based on new measurement technology for improved reliability and stability. With the new technology the transmitter's inspection interval is extended to five years. Designed for demand controlled ventilation, these transmitters measure carbon dioxide and temperature, with the option for humidity measurements. The instruments come with a calibration certificate that meets traceability and compliance requirements. Reliability from Unique Measurement Technology GMW90 series transmitters use advanced Micro-Electro-Mechanical System (MEMS) technology for measuring carbon dioxide. The CARBOCAP® carbon dioxide sensor's continuous reference measurement enables reliable and accurate readings and outstanding longterm stability also in buildings with round-the-clock occupancy. The new generation CARBOCAP® sensor no longer uses an incandescent light bulb, which limits sensor lifetime. This unique sensor consumes very little power compared to other sensors on the market. As a result, instrument self-heating is low and humidity and temperature can be measured correctly. Convenient Installation GMW90 series transmitters have been designed for quick and easy installation and maintenance. Every model includes a display for easy startup and convenient maintenance. To protect the sensor from dust and dirt during construction and installation, the units can be cabled with back-plate only. Electronics can be snapped on later at an appropriate phase in the construction project. DIP switches make it quick and easy to configure the transmitters. Easy Calibration Regular instrument maintenance guarantees a long product lifetime. Calibration is easiest done with the exchangeable measurement modules. Sensor traceability and measurement quality is easily maintained by snapping on a new module calibrated at Vaisala factory. The instrument can also be calibrated using a hand-held meter or reference gas CO2 bottle. The service interfaces are easy to reach by simply sliding the cover down. The closed cover keeps the measurement environment stable during calibration and ensures a top-quality final result.

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CO2, Temperature and Humidity Transmitter Series GMW90 - 2

3-wire, voltage output with display 3-wire, current output with display 3-wire, voltage output with display 3-wire, voltage output with display and CO2 indicator LEDs 3-wire, current output with display Digital (BACnet/Modbus) model Digital (BACnet/Modbus) model with display Digital (BACnet/Modbus) model Digital (BACnet/Modbus) model with display Configurable analog/digital models Configurable analog/digital models

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CO2, Temperature and Humidity Transmitter Series GMW90 - 3

Measurement Performance Supply voltage Service port Current Output Models Outputs Loop resistance Power consumption Voltage Output Models Outputs Load resistance Power consumption Default Analog Scales CO2 T RH Carbon Dioxide Measurement range 0 ... 5000 ppm Stability in typical HVAC applications Total accuracy at room temperature ±75 ppm at 600 and 1000 ppm incl. 5 years drift Carbon dioxide sensor Vaisala CARBOCAP® GM10 + (23 ... +50 °F, +104 ... +131 °F) Temperature Measurement range -5 ... +55 °C (+23 ... +131 °F) Temperature sensor Digital temperature sensor (+23 ... +50 °F, +104 ......

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