APPLICATION NOTE
AIR CONDITIONING & REFRIGERATION
Background
AC and refrigeration systems require precise
and reliable pressure control to ensure safe,
reliable, and efficient operation. As AC and
refrigeration equipment utilizes compression
and evaporation of refrigerants to produce
a cooling effect, therefore it is critical that the
refrigerant pressures in these system are
managed carefully to ensure the equipment
operates properly and will not become unsafe
due to excessive pressures. New AC and
refrigeration systems also manage pressure
with pressure sensors and variable speed
compressors to ensure the highest possible
energy efficiency.
Solution
For decades, Sensata has been a leading
provider of pressure sensing solutions used in
AC and refrigeration systems. The PS80 is a
UL listed automatic reset pressure switch that
provides electro-mechanical pressure control
for both low pressure and high pressure control
in refrigerant loops. The PS80 is available
in a wide range of pressure settings and
configurations which can be used with a wide
range of refrigerants. The 2CP5 is a device
designed for today’s most efficient AC and
Refrigeration equipment that use pressure
sensing, electronic controls, and variable speed
compressors to precisely manage the refrigerant
pressure for lower power consumption, quieter
operation and more pressure temperature
control. Both the PS80 and 2CP5 are ideal
for demanding applications where long-term
reliability and accuracy is critical.
New AC and refrigeration
systems manage pressure
with pressure sensors to
ensure the highest possible
energy efficiency
Commercial Fridge & Freezer
Rooftop AC System
Page 1
RELATED PRODUCTS
Reference on
Diagram
Product
Features
Function
Technology
Operating Range
1
2CP5
• UL recognized
• Low cost
Pressure Sensor
Ceramic capacitive
0-15 to 0-750 psi
2
2HMP
• Hermetic
• 1% accuracy
Pressure Sensor
MEMS
0-100 to 0-750 psi
3
PS80
• UL recognized automatic
reset
Pressure Switch
Klixon (snap-acting
switch)
0-750 psi
4
3NT
• Dry seal (ideal for
condensing environments)
Thermostat
Klixon (snap-acting
switch)
-20 to 135°C
GENERAL REFRIGERATION CYCLE DIAGRAM
Page 2
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Copyright © 2018 Sensata Technologies, Inc.
Rev:03/01/18
CONTACT US
Americas
+1 (877) 350 2727
sensors@sensata.com
switches@sensata.com
Europe, Middle East & Africa
+359 (2) 809 1826
pressure-info.eu@sensata.com
Asia Pacific
sales.isasia@list.sensata.com
China +86 (21) 2306 1500
Japan +81 (45) 277 7117
Korea +82 (31) 601 2004
India +91 (80) 67920890
Rest of Asia +886 (2) 27602006
ext 2808
www.sensata.com
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