Vaisala XMW85 CO₂, Humidity and Temperature Transmitter Series

Product Overview

Vaisala’s XMW85 Series is a versatile, configurable transmitter designed for accurate measurement of carbon dioxide (CO₂), relative humidity (RH), and temperature in indoor environments. Engineered for smart building and HVAC applications, it provides reliable real-time data to optimise ventilation control, improve energy efficiency, and maintain healthy indoor air quality.

With seamless Modbus RTU communication over RS-485 and flexible configuration options, the XMW85 is ideal for integration into modern building management systems across commercial, healthcare, and educational facilities.

Key Features

• 3-in-1 measurement: CO₂, humidity, and temperature
• Modbus RTU (RS-485) communication for easy system integration
• Interchangeable CO₂ module (GM10) and INTERCAP® humidity sensor
• High accuracy: ±3.0 %RH
• Advanced CARBOCAP® technology for superior CO₂ stability
• Low self-heating microglow light source for improved measurement accuracy
• Optional display (metric or non-metric)
• Fast startup with long-term stability
• Designed for easy installation and low maintenance

Key Benefits

Accurate Environmental Monitoring
Reliable measurement of CO₂, humidity, and temperature ensures optimal indoor air quality and occupant comfort.

Seamless Integration
Modbus RTU connectivity allows straightforward integration into building automation and HVAC systems.

Energy Efficiency
Supports demand-controlled ventilation strategies to reduce energy consumption while maintaining performance.

Flexible Configuration
Available in multiple variants with or without display to suit different application requirements.

Long-Term Reliability
Stable measurement performance, even in continuously occupied environments, reduces maintenance and recalibration needs.

Typical Applications

• HVAC and building automation systems
• Smart buildings and energy management
• Offices, schools, and commercial spaces
• Healthcare facilities
• Indoor air quality monitoring

Available Models

• XMW85H: RH + Temperature (no display)
• XMW85HD: RH + Temperature (with display)
• XMW85HE: RH + Temperature (non-metric display)
• XMW85G: CO₂ + RH + Temperature (no display)
• XMW85GD: CO₂ + RH + Temperature (with display)
• XMW85GE: CO₂ + RH + Temperature (non-metric display)

The Vaisala XMW85 Series delivers a cost-effective and dependable solution for multi-parameter indoor climate monitoring. Combining high measurement accuracy, robust sensor technology, and flexible integration, it is an ideal choice for modern ventilation and building control systems.