CO2, Temperature and Humidity Transmitter Series GMW90

GMW90 Series Carbon Dioxide, Temperature, and Humidity Transmitters

Digital GMW95D with a display measures CO2 and temperature

Digital GMW95RD measures CO2, temperature and humidity

Example of a decorative cover for GMW90 and HMW90 on a brick wall

Example of a decorative cover for GMW90 and HMW90 with a cafeteria sign

An example of a decorative cover for GMW90 and HMW90 with wallpaper

CO2, Temperature and Humidity Transmitter Series GMW90

for Green Building Projects

The wall-mounted Vaisala GMW90 Series CARBOCAP® Carbon Dioxide, Temperature and Humidity Transmitters are especially suited for green building projects. The devices measure carbon dioxide and temperature and have an option for an additional humidity measurement. The instruments come with a calibration certificate that meets traceability and compliance requirements. Traceability is easily maintained with field-exchangeable intelligent measurement modules. The transmitter can be blended into the interior design of the space where it is installed using the optional decorative cover.

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Watch the video

View this video on how to calibrate GMW90.

Key Benefits

Easy installation

The GMW90 Series Transmitters have been designed for quick and easy installation. Every model includes a display for easy startup. 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. This saves installation time in the project.

Convenient calibration

Regular instrument maintenance guarantees a long product lifetime although the transmitter’s inspection interval is five years. Calibration is easiest using 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.

Overview

The 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 long-term 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.

The following models are available:

GMW93, CO2+T, 3-wire, voltage output
GMW93D, CO2+T, 3-wire, voltage output with display
GMW94, CO2+T, 3-wire, current output
GMW94D, CO2+T, 3-wire, current output with display
GMW93R, CO2+T+RH, 3-wire, voltage output
GMW93RD, CO2+T+RH, 3-wire, voltage output with display
GMW93RA, CO2+T+RH, 3-wire, voltage output with display and CO2 indicator LEDs
GMW94R, CO2+T+RH, 3-wire, current output
GMW94RD, CO2+T+RH, 3-wire, current output with display
GMW95, CO2+T, Digital (BACnet / Modbus) model
GMW95D, CO2+T, Digital (BACnet / Modbus) model with display
GMW95R, CO2+T+RH, Digital (BACnet / Modbus) model
GMW95RD, CO2+T+RH, Digital (BACnet / Modbus) model with display
GMW90, CO2+T, Configurable analog/digital models
GMW90R, CO2+T+RH, Configurable analog/digital models

For details, see the datasheet.

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)

Optional decorative cover blends the transmitter into your interior design

Details

Specifications

Datasheet

GMW90 Datasheet1.88 MB

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