Skip to Content
  1. All products
  2. CO2 meters
  3. Vaisala GMW90 Industrial CO₂, Temperature and Humidity Transmitter
  4. CO2 meters
Pricelist: Standaard prijslijst EUR Pricelist
Pricelist: Standaard prijslijst EUR Pricelist

Vaisala GMW90 Industrial CO₂, Temperature and Humidity Transmitter

The Vaisala GMW90 series is a reliable transmitter for CO₂, temperature and humidity, with CARBOCAP® microglow technology, analogue or digital outputs and easy calibration via interchangeable modules.
320.65 € 320.65 € (Tax included)
265.00 € (Tax included)

265.00 € 265.00 € without taxes


  • Measurement parameters
  • Measurement parameters
  • Measurement parameters
  • Affichage
  • Feature
Add to cart
Terms and Conditions
30-day money-back guarantee
Shipping: 2-3 Business Days
Request a quote
Measurement parameters: Temperature , Relative humidity
Affichage: Yess (with live reading)
Feature: Stop light function
Documents
Vaisala GMW90 Datasheet

Internal Reference: 1503

Description

The Vaisala GMW90 series offers highly reliable transmitters for measuring CO₂, temperature and relative humidity, specially designed for demand-controlled ventilation (DCV) systems in offices, schools and other buildings. Thanks to the innovative CARBOCAP® sensor with microglow technology, this series guarantees a long service life, low energy cost and excellent measuring accuracy.

The transmitters are available with both analogue and digital outputs (BACnet/Modbus) and can optionally be fitted with a display and CO₂ indicator LEDs. Calibration is simple thanks to interchangeable modules and the included traceable CO₂ calibration certificates.

Key features

  • Measures CO₂ (0–5000 ppm), temperature (-5 to +55 °C) and optionally relative humidity (0–95 %RH)
  • CARBOCAP® CO₂ sensor with excellent stability and low drift (< ±75 ppm over 5 years)
  • Automatic reference measurement system for buildings occupied 24/7
  • Fast and easy installation with modular construction (electronics can be fitted seamlessly after the construction phase)
  • Easy calibration with interchangeable measurement modules (or via a handheld meter or reference gas)
  • Available with voltage or current outputs, or as a digital version with BACnet/Modbus
  • Traceable 3-point CO₂ calibration included
  • Optional: traffic-light indication (CO₂ LEDs) and decorative covers

Technical specifications (excerpt)

CO₂:

  • Measuring range: 0–5000 ppm
  • Accuracy: ±(30–45 ppm + 2–3.8% of reading, depending on temperature)
  • Sensor: Vaisala CARBOCAP® GM10

Temperature:

  • Measuring range: -5 … +55 °C
  • Accuracy: ±0.5 to ±0.8 °C

Relative humidity (optional):

  • Measuring range: 0–95 %RH
  • Accuracy: ±2.5 to ±5.0 %RH, depending on temperature and humidity

Outputs & communication:

  • Voltage: 0–5/10 V, current: 0/4–20 mA
  • Digital: BACnet MS/TP or Modbus RTU (RS-485)
  • Power supply: 18–35 VDC or 24 VAC

Dimensions & mounting

  • Dimensions: Compact design, white (RAL9003)
  • Housing: ABS/PC, IP30
  • Wall mounting with screw terminals (up to 2 mm²)
  • Easy access to the service interface via a sliding cover

Applications

  • HVAC-controlled ventilation in commercial buildings
  • Energy-efficient air quality control
  • Monitoring in offices, schools, hospitals and public buildings

Questions, or need technical advice or a tailored quote?

Feel free to contact us by email or phone.