Setra’s differential pressure sensors are known for their quality and reliability. Designed with premium capacitive sensing technology, Setra offers single-range and multi-range (field selectable) pressure sensors. Capable of measuring both liquid and gasses, Setra has the product to meet a breadth of HVAC applications and can be trusted in your most critical applications. Trust Setra's over 50 years of pressure transducer engineering excellence.
The Model 230 is Setra's highest accuracy solution for monitoring differential pressure in wet-to-wet applications. Its single diaphragm design enables a true wet-to-wet differential pressure measurement with superior accuracy.View Product
Setra's Model 267 is Setra’s most highly configurable multirange low differential pressure transducer. It delivers accuracies of ±0.25%, 0.5% and ±1% FS and pressure ranges from 0.1” W.C. up to 100” W.C.View Product
What is differential pressure? Differential pressure (DP or ΔP) is simply the difference between two pressure forces. Typically, differential pressure is measured across an object, like a filter, to measure the difference or changes in pressure. As the pressure on one “side” increases or decreases disproportionately to the other, differential pressure will change accordingly.
Why is differential pressure important? Differential pressure is important in the context of HVAC systems largely for efficiency. In a general building setting, maintaining differential pressure ensures enough airflow to condition the building, while not overworking the system - preventing unnecessary energy usage. Measuring the pressure differential across filters in HVAC ductwork, for example, also help with predictive maintenance – reducing both short term and long term cost.
How do differential pressure sensors work? Differential pressure transducers are designed with capacitive sensing technology. These sensors have thin diaphragms located between two parallel metal plates. When external pressure is applied, the diaphragm flexes slightly, causing a change in the capacitance and therefore a change in the output of the sensor.
What is a capacitive pressure sensor? A capacitive pressure sensor is a sensor that measures differential pressure using capacitive technology. Capacitive pressure sensors have a thin diaphragm that flexes as pressure is applied. The distance of flex is measured and translated as a pressure reading. This technology allows capacitive pressure sensors to report in near real-time with extraordinary accuracy.
What makes Setra's differential pressure sensors stand out? Setra’s pressure sensors are considered best-in-class for a handful of reasons, including their accuracy, ranges, and stability. Setra produces sensors with accuracy as high as +/- 0.02% Full Scale. The sensors reach measurement ranges as low as 0.05 inches of water column (approximately 0.0018 PSI) and their capacitive technology also allows extremely low impact from device age and environmental conditions when compared to competitive units.