Pressure transmitters for refrigerators

Pressure transmitters are widely used in industrial-grade refrigeration systems: refrigeration plants and units, refrigeration centers and chillers, industrial-grade air conditioning systems.

Refrigeration equipment can have separate low and high pressure transmitters on each cooling circuit. Pressure transmitters monitor operation of refrigeration equipment; they are used in:

• systems regulating performance of injection and suction lines compressors
• systems controlling refrigerant circulation pumps
• flow control systems
• refrigerating unit systems that regulate thermal expansion compensation and control cooling liquid temperature
  
  
  

Data provided by pressure transmitters enables:

• high and low pressure control and threshold signaling
• ventilation systems control
• pressure drop control in compressor units
• evaporator frost protection
  
  
  

Pressure transmitters for refrigeration equipment have a number of distinctive features, including:

1. Welded mounting
   Refrigerants used in refrigeration units are aggressive to virtually all elastomers. Measuring their pressure requires a no-seals design, with pressure ports welded to sensors.
   
   
2. Special pressure port versions
   Threaded connections of such pressure ports are rarely found in other industries and technological setups: ¼ NPT, G 3 / 8A, ¼ milled, 3/8 soldered, 7/16 "-20 UNF FTHRD.
   
   
3. Output signal
   Transmitters can be designed to generate a ratiometric output signal of 0.5-4.5 V. This kind of output signal linearly depends on the transmitter's supply voltage.
   
   
4. Range adjustment
   Low pressure: -1 ... 6 bar; -1 ... 10 bar; -1 ... 16 bar
   High pressure: -1 ... 25 bar; -1 ... 40 bar; -1 ... 60 bar