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Sponsored Article

Ultra-low differential pressure sensors in HVAC applications – is both high sensitivity and reliability possible?

17 March 2017

First Sensor is one of the world's leading suppliers in the field of sensor systems. Our company develops and manufactures both standardized and tailor-made sensor solutions for the detection of light, radiation, pressure, flow, level and acceleration for applications in the Industrial, Medical and Mobility growth markets. The company produces in-house and along the value-added chain from component to system level.

In HVAC systems, the ability to monitor volumetric flow rates and pressures in lines and rooms is decisive when it comes to operating heating,ventilation, and air-conditioning systems efficiently and economically.Pressure sensors are a central element for controlling the systems. To ensure compliance with strict legal requirements and to minimize energy costs, ever-decreasing measuring ranges as well as greater measuring sensitivities, accuracies, and long-term stabilities of the sensors are required.

In addition, the pressure sensors must cope with particular requirements in HVAC systems,such as dust-laden air, and must be small and easy to integrate in OEM systems. This presentation covers our flow-based LMI differential pressure sensor which is based on thermal flow measurement of air through a micro-flow channel integrated within the sensor chip. This innovative sensor technology enables superior sensitivity for the measurement of ultra-low pressures from 25 Pa(0.25 mbar) full scale with high resolution and offset stability.

The extremely low gas flow through the sensor ensures high immunity to dust contamination, humidity and connection tube lengths/diameters compared to other flow-based pressure sensors. Further, attendees will learn that the low profile LMI sensor allows for flexible direct manifold assemblies due to a total height of only 9 mm including pressure ports. The SMT devices are highly versatile to fit to custom adaptors for application-specific mounting requirements. The sensor features I²C bus output and 3 V supply together with a low-power mode with minimal standby current for battery powered applications.
https://www.first-sensor.com/en/company/press/technical-press/lmi/


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