Accurate sensing is at the heart of every building automation system. Belimo sensors are designed to make HVAC systems run more efficiently, stay reliable longer, and deliver consistent comfort for occupants.

With options for temperature, humidity, pressure, air quality, and flow, Belimo’s sensors combine precision, durability, and simple integration into one streamlined line of products.

Smart Design. Real Performance.

Belimo sensors are built with the same attention to detail the company is known for in their actuators and valves. The housing design features IP65/NEMA 4X protection, allowing installation in demanding environments, and spring-loaded terminals that make wiring faster and more secure.

Every sensor is factory-calibrated, designed for easy commissioning, and backed by a five-year warranty. Communication via BACnet, Modbus, or MP-Bus allows seamless connection to any building management system.

With Near Field Communication (NFC) and the Belimo Assistant 2 App, setup, adjustments, and troubleshooting can be done directly from a smartphone, even when the sensor isn’t powered.

Download full sensor brochure to learn more!

Temperature Sensors

Temperature is the foundation of comfort and energy management. Belimo offers sensors for duct, pipe, outdoor, and room applications, all designed to deliver accurate readings across changing conditions.

Key details:

  • Sintered moisture protection coating prevents damage from condensation and vibration.
  • Up to eight active measurement ranges in one device.
  • Available in duct, pipe, strap-on, outdoor, and room configurations.
  • Multiple signal outputs: 0–10 V, 4–20 mA, Ni1000, Pt1000, NTC10K.

Whether controlling supply air, hydronic loops, or outdoor compensation, Belimo temperature sensors provide reliable data that helps systems perform at their best.

Humidity Sensors

Maintaining the right humidity protects equipment and improves indoor comfort. Belimo’s humidity sensors use CMOS-based polymer capacitance technology for stable, long-term performance even in humid or contaminated environments.

Highlights:

  • Supports BACnet and Modbus communication for straightforward integration.
  • ±2% relative humidity accuracy, long-term drift <±0.25%.
  • Measures humidity, dew point, enthalpy, and absolute humidity.
  • Available with or without temperature sensing.

Combined temperature and humidity models reduce the need for multiple devices, simplifying installation and maintenance.

Air Quality Sensors

Air quality directly impacts productivity and energy use. Belimo’s CO₂ and VOC sensors monitor air freshness so ventilation systems only run when needed.

Each unit uses dual-channel NDIR technology that maintains calibration accuracy over time without requiring field recalibration.

Features:

  • BACnet and Modbus for direct BAS integration.
  • Maintenance-free operation with long-term stability.
  • Options for CO₂ only or combined CO₂ + VOC + humidity + temperature.
  • LED “traffic light” indicator for CO₂ levels.

These sensors help buildings meet ventilation codes, improve indoor air quality, and lower energy costs through demand-controlled ventilation.

Pressure Sensors

Precise pressure monitoring keeps HVAC systems balanced and efficient. Belimo’s pressure sensors measure air and water pressure accurately and reliably.

Air Differential Pressure Sensors:

  • Optional LCD display.
  • Eight field-selectable ranges in one device.
  • Auto-zero or manual calibration.

Water Pressure Sensors:

  • Stainless steel wetted materials and housings.
  • Ceramic or stainless-steel sensing elements for durability.
  • Differential and static options for hydronic systems.

Selectable ranges make it easy to adapt one model to different applications, reducing inventory needs and installation time.

Room Sensors

Belimo’s wall-mounted room sensors combine clean design with practical control. They measure temperature, humidity, and CO₂, with models available with or without an ePaper touch display.

Highlights:

  • Optional smartphone control through the Belimo Room Display App.
  • Near Field Communication (NFC) for setup and commissioning.
  • CO₂ indicator light for quick air quality feedback.
  • Spring-loaded terminals and snap covers for quick installation.

Room sensors can be configured directly from a mobile device, offering quick access to data, adjustments, and troubleshooting without removing covers or interrupting operations.

Flow Sensors

Belimo’s ultrasonic flow sensors measure liquid flow with ±2% accuracy using transit-time technology. They provide reliable data for chilled and hot water systems without requiring straight pipe runs.

Technical advantages:

  • BACnet and Modbus integration for transparent flow and energy data.
  • Factory NIST-traceable wet calibration.
  • Built-in temperature sensing.
  • Patented glycol compensation algorithm for variable mixtures.

Compact, corrosion-resistant, and maintenance-free, these flow sensors simplify balancing, commissioning, and long-term performance verification.

Tools That Simplify the Work

Belimo supports its sensors with a set of digital tools to make every stage—from selection to service—simpler:

  • RetroFIT+ App: Find replacement sensors quickly.
  • Belimo Assistant 2 App: Commission and diagnose via NFC.
  • Duct Sensor Assistant App: Adjust ranges, view data, and manage configurations.

Each app helps reduce setup time and minimize errors in the field.

Why Choose Belimo Sensors

Belimo sensors combine proven accuracy with easy installation, modern connectivity, and long-term durability. Each model is engineered to integrate seamlessly with existing BAS networks and reduce maintenance through reliable, drift-free operation.

From precise air quality monitoring to dependable hydronic measurement, Belimo provides a sensor for every key control point in a building’s HVAC system—all backed by a five-year warranty and world-class technical support.

Contact your sales representative to learn more!