Sensors from Belimo offer superior reliability, easy installation, and seamless integration with major Building Automation Systems (BAS). We offer a complete line of field-level device solutions, including sensors for measuring temperature, humidity, pressure, CO2, and volatile organic compounds (VOCs) in pipe and duct applications. All of our products are backed by world-class service and support.


  • Belimo sensors are compatible with major building automation systems, making them suitable for use in any HVAC application.
  • Built from the highest quality materials, Belimo sensors deliver reliable and accurate readings over the entire life-cycle of the building. They also carry a five-year warranty and conform to NEMA 4X / IP65 requirements.
  • The sensors’ compact modular design features a detachable mounting plate and snap cover that can be opened and closed without tools, allowing installation and commissioning to be completed in just a few simple steps.

Temperature Sensors

Accurate and reliable temperature readings are essential for optimal building comfort and energy efficiency. Outdoor air, duct, and pipe temperature sensors are designed for easy installation and are compatible with all major BAS.

  • Up to eight active measurement ranges simplifies field selection and reduces stock storage for maximum flexibility.
  • Variety of output signals: passive NTC, RTD, 0-5/10 VDC, 4 to 20 mA.
  • Sintered moisture protection coating on all duct, immersion, and cable sensors protects against condensation, mechanical stress, and vibrations.


Humidity Sensors

Controlling humidity in buildings is critical to occupant comfort. It’s also important to protecting building infrastructure, production processes, stored goods, and museum artwork. Belimo’s range of durable duct, outdoor air, and condensation sensors are manufactured using the highest quality materials to ensure superior reliability, accuracy, and repeatability. Combined temperature and humidity sensors provide a flexible and cost-effective solution.

  • Complementary Metal Oxide Semiconductor (CMOS) based polymer-capacitance sensor with an accuracy of ±2% relative humidity as standard and long-term drift <±0.25% not affected by high humidity and contaminants.
  • Multi-sensor with selectable output measurement values: relative humidity, absolute humidity, enthalpy, and dew point.
  • Up to four active temperature measurement ranges simplifies field selection and reduces stock storage, providing flexibility for change requests during commissioning.

Air Quality Sensors

Air quality sensors guarantee occupant comfort and health. We offer a wide range of combined multi-sensors for CO2, humidity, temperature, and VOCs designed to ensure air quality and maximize energy savings over the life-cycle of the building.

  • Dual Channel CO2 sensor based on NDIR technology. The additional reference channel, allows effective compensation of long term drift, thus providing precise accuracy and long-term stability.
  • Sensors are completely maintenance free.
  • Integrated temperature, humidity, and VOC sensors are available for building applications that require sensors with multi-functional capabilities.
  • Dual Channel self-calibration technology allows the Belimo CO2 sensors to be used for all types of buildings and applications where ABC logic can not be used.

Pressure Sensors

Accurate pressure measurement is important for optimal HVAC system performance. Pressure sensors from Belimo are capable of measuring extremely high and low pressures in both inert and corrosive liquid and gas applications. The sensors offer precise measurement of pressure, differential pressure, and velocity for reliable monitoring. Selectable measuring ranges are available for application flexibility.

  • Differential Air Pressure Sensor
    • Eight field selectable pressure ranges in one unit.
    • Direct volume-flow-output equations are pre-programmed for most major fan manufacturers.
    • Excellent zero-point stability and high accuracy.
    • Auto-zero or manual calibration option.
    • LCD display optional.
  • Differential Air Pressure Switch
    • Field-adjustable switch point.
    • Gold-plated contacts.
    • Mechanical working life 106+ switching operations.
  • Differential Liquid Pressure Sensor
    • Highly stable resistive sensor element on ceramic substrate.
    • Rugged stainless steel housing.
  • Pressure Sensor for Liquids, Refrigerants and Gases
    • Resistive sensor element on stainless steel membrane.
    • All wetted material is made from stainless steel.

Flow Sensors

Reliable measurement of flow plays an important role in maximizing HVAC system efficiency and conserving energy. Belimo’s inline flow meters utilize ultrasonic transit-time technology to provide accurate and repeatable flow measurement in any application. Their compact size and robust design makes them suitable for use with chilled water, hot water, and water/glycol solutions at temperatures ranging from -4°F to +250°F [-20°C to +120°C]. The meters are fabricated from corrosion-resistant materials, ensuring reliable operation and extended product life.

  • Multi-point wet calibrated to ensure accuracy and repeatability.
  • Patented temperature and glycol compensation logic eliminates calibration requirements.
  • ±2% accuracy of reading and ±0.5% repeatability ensure accurate and precise flow measurement.
  • Ultra-compact size with a short inlet length of 5 x nominal pipe diameter, and no output-length requirements allow the ultrasonic flow sensor to be installed in tight spaces.
  • Low power consumption of 0.5W saves energy and transformer capacity.

A Seamless Approach

For over 40 years, Belimo has been continuously developing and expanding its range of new products and technologies to improve efficiency in buildings. The new range of sensors stems from the release of the Belimo Energy Valve™, an innovative solution that features a unique combination of sensors and a flow meter.

Seamlessly integrated.
The new sensor range from Belimo