The Role of Pressure Sensors in HVAC/R system with CO₂
Heating, ventilation, air conditioning, and refrigeration (HVAC/R) systems rely on refrigerants to transfer heat efficiently...
These fluids absorb heat by changing phase — from liquid to gas — and release it as they return to a liquid state. While many traditional refrigerants like chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) offer effective thermodynamic properties, they pose serious environmental risks due to their high global warming potential (GWP) and contribution to ozone layer depletion.
Carbon dioxide (CO₂), also known as R744, has emerged as a compelling alternative. With a GWP of just 1, it is environmentally friendly, non-toxic, and non-flammable. However, one of the key challenges in adopting CO₂ as a refrigerant lies in its significantly higher operating pressure compared to legacy refrigerants. This places greater demands on system components, especially pressure sensors, which must withstand extreme conditions while maintaining long-term reliability and precision.
To meet these challenges, Sensata Technologies, as global leader in pressure sensor innovation, has developed the PTE7100 pressure sensor series specifically for high-pressure applications like CO₂-based HVAC/R systems.
The PTE7100 features:
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A hermetically sealed pressure port
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Multiple connector and process port configurations
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High measurement accuracy of ±0.25% BFSL
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Operating temperature range from -40°C to +125°C
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Outstanding thermal shock resistance
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A cycle life exceeding 10 million operations
By combining robust design with precision and durability, the PTE7100 helps HVAC/R manufacturers improve energy efficiency and system reliability, even under demanding conditions.
