Sensors are the Foundation for Occupant Comfort

    Posted on Tue,Nov 27, 2018 @ 04:35 PM

    In HVAC systems, sensors measure controlled variables of temperature, humidity, pressure, and air quality.  Sensor inputs connect to the Direct Digital Control (DDC) system and network to the Building Automation System (BAS).  High quality sensors are the foundation for ensuring occupant health and comfort and are essential for energy efficiency within buildings.  

    control-building-solution-Michael-JacksonThe Rocky Mountain Institute (RMI) states “The buildings in which we work, live, learn, and play threaten our climate, our economy, and our health while also posing an increasing financial risk to owners and investors. As the biggest consumers of power, buildings can literally make or break the critical transition to a low-carbon energy future.” RMI also states that buildings consume 35% of the global energy and 60% of the generated electricity.

    “An increase of 1 percent in productivity can nearly offset a company’s entire annual energy cost”, was stated in the report “Greening the Building and the Bottom Line” authored by personnel from the U.S. Department of Energy and the RMI.

    Sensors are the perfect complement to actuators and valves optimizing energy efficiency and system performance. Belimo sensors seamlessly integrate into building automation systems (BAS). The universal enclosure design, intuitive screwless snap cover, and detachable mounting plate make installation and commissioning easy. With a focus on quality, the Belimo sensors carry a five-year warranty, conform to NEMA 4X and IP65 requirements, are UL compliant, and backed by world-class service and support. The Belimo sensor offerings include single and multi-range: temperature, humidity, pressure, CO2, VOC’s (Volatile Organic Compounds), and flow sensors for pipe, duct, and outdoor applications.

     “Belimo sensors not only deliver reliable and accurate readings,” states David Alliband, Manager, Sensor Solutions, “ The universal enclosure design offers customers reduced product selection and inventory levels and also feature a modular ½" conduit fitting and spring loaded terminal block for ease of installation and commissioning.” 


    Sensor product offerings:


    • Variety of output signals: passive NTC, RTD, 0-5/10 VDC, 4 to 20 mA
    • Sintered moisture protection coating on duct, immersion, and cable sensors protecting against condensation, mechanical stress, and vibrations


    • Complementary Metal Oxide Semiconductor (CMOS) based polymer-capacitance sensor with an accuracy of ±2% relative humidity as standard and long-term drift of <±0.25% not affected by high moisture and contaminants
    • Multi-sensor with selectable output measurement values of relative humidity, absolute humidity, enthalpy, and dew point

    Air Quality

    • Dual channel self-calibrating CO2 sensor based on NDIR technology allowing effective compensation of long-term drift providing precise accuracy and long-term stability
    • Integrated temperature, humidity, and VOC sensors for building applications that require sensors with multi-functional capabilities


    • Capable of measuring extremely high and low pressures
    • Precise measurement and reliable monitoring of pressure, differential pressure, and velocity
    • Selectable measuring ranges for application flexibility
    • True auto-zero calibration technology


    • Ultrasonic transit-time technology providing accurate and repeatable flow measurement
    • Compact and rugged design 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 quality of the output is dependent on the quality of the input. Belimo sensors within HVAC systems are the foundation for comfort, installation efficiency, and energy savings.

    Tags: Belimo News, Sensors

    Pressure Sensors Optimize Building Performance

    Posted on Mon,Nov 05, 2018 @ 12:44 PM

    HVAC system performance and comfort rely on accurate measurement and control of differential pressure.  Effective air distribution is achieved by closely monitoring and controlling air pressure.  By monitoring the airflow pressure across dampers, filters, fans, and between rooms, the HVAC system can efficiently and economically optimize building performance and reduce energy consumption.

    AHU_Sensors_noblueSensors from Belimo offer superior reliability, easy installation and commissioning, and seamless integration.

    Belimo pressure sensors are designed for air applications with a focus on low pressure for high accuracy, stability and zero drift for critical environmental applications.with major Building Automation Systems (BAS). They are the result of over four decades of experience, research, and a focus on providing value-adding technologies.

    Belimo differential air pressure sensors feature:

    • Eight field selectable pressure ranges in one unit helping to reduce inventory and support on-site range selection
    • Excellent zero-point stability and high accuracy ensuring optimal performance and repeatability.
    • Optional true auto-zero calibration ensures all measurements are accurate and drift free, no need for manual maintenance or on-site visits
    • Modbus communication protocol provides superior application data access and enables easy commissioning and parameterization
    • Snap-on housing allowing for quick installation and easy commissioning
    • Modular conduit fitting enables various mounting and cable configurations to meet a variety of applications
    • Spring-loaded removable terminal block creates a connection that offers resistance to vibration and maximum pull-out force, saving time during wiring and ensuring contact reliability
    • Output protection provides reverse-polarity protection, which minimizes the risk of damage caused by incorrect wiring
    • Detachable mounting plate designed as a drill template for easy and faster installation
    • NEMA 4X / IP65 and UL compliance enclosure tested to withstand harsh indoor and outdoor conditions, including exposure to dirt, dust, humidity, condensation, rain, and snow
    • Accurate and reliable readings backed with a 5-year warranty

    Discover the advantages



    Tags: Belimo News, Technical Tips, Sensors