Pressure Controllers & Transducers

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PC–Series: Differential Pressure Controllers

Alicat PC-Series differential pressure controllers measure the differential pressure between any two points in your process, and control flow at a different point to ensure the pressure differential remains constant. The two process ports connect to opposite sides of the differential pressure sensor; positive readings denote higher pressure at the left (upstream) process port, and negative readings denote higher pressure at the right (downstream) port. We’ll use your application parameters to customize your valve and PID tuning to ensure that your controller delivers fast and stable pressure control.

  • Versatile control. Plumb the two pressure ports wherever you need to measure and control the pressure difference. Use the instrument as a gauge pressure controller by leaving the downstream port open to atmosphere.
  • Custom fine-tuning. Custom valve sizing and PID tuning ensure pressure setpoints are reached in milliseconds with NIST-traceable accuracy to ±0.125% of full scale.
  • Easy integration. Custom process ports and electrical connectors in addition to your choice of EtherNet/IP, EtherCAT, DeviceNet, Profibus, Modbus (RTU and TCP/IP), or serial communications options enables easy integration into your industrial process.

Accessories included with purchase:

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Not exactly what you’re looking for?

  • We offer several additional pressure controller options, including anti-corrosive, bidirectional, and absolute/gauge pressure devices (see “models” tab below).
  • If a pressure controller is not what you need, check out our other pressure or flow control and measurement solutions.
  • Still don’t see what you need? Feel free to contact us and discuss custom build options with one of our applications engineers.
Differential PC-Series performance (most products)
  • Available ranges: max –500 to +500 PSID; min –2 inH₂O to +2 inH₂O PSID
  • Steady state control range: 0.01% – 100% of full scale
  • Standard accuracy calibration, NIST-traceable: ±0.25% of full scale
  • Optional high-accuracy calibration, NIST-traceable: ±0.125% of full scale
  • Repeatability: 0.08% of full scale
  • Typical control response time: as fast as 50 ms
  • Warm-up time: <1 s
Differential PC-Series operating conditions
  • Compatible gases: All non-corrosive gases
  • Operating temperature: –10°C to +60°C
  • Proof pressure: 200 PSIG
  • Burst pressure: 3x full scale (1.5x full scale for 500 PSID devices)
Available device ranges for differential PC-Series

Alicat offers differential pressure controllers with custom differential pressure ranges from 2 inH₂O full scale to 500 PSID full scale, each with a pressure control range of 0.01% to 100% of full scale. Custom devices are ranged to best meet your specific application needs for full scale pressure and operating range.

It is important to note that some device specifications vary depending on the full scale pressure.

If you have any questions or need additional information, reach out to our applications engineers.

Device customization | Build and performance options

  • Communications protocols: analog, RS–232, RS–485, DeviceNet, EtherCAT, EtherNet/IP, Modbus RTU or TCP/IP, PROFIBUS
  • Displays: monochrome or color; integrated or panel–mount
  • Process connections: NPT, SAE, AN, BSPP/G, welded compression, or VCR/VCO fittings
  • Elastomers: Viton, FFKM, EPDM, Silicone
  • Calibration: High-accuracy or custom
  • Performance: Integrated potentiometer control

Valve sizing and PID tuning | Valve options

Your pressure controller may be customized with one of the following valving options to ensure optimal performance under your expected process conditions.

  • PC – small proportional control valve for flow ranges of 20 slpm and below
  • PC with PCA designation – high-performance proportional control valve used for applications with higher pressures
  • PCP – small proportional control valve with the largest orifice (not available for corrosive configurations)
  • PCH – hammerhead configuration, which pairs two small valves working side-by-side as one valve
  • PCR – nearly frictionless large Rolamite proportional valve for flow rates of 50 slpm and above

Accessories | Sold separately

  • Process port fittings and filters
  • Power supplies
  • Communications cables and conversion cables
  • BB3 and BB9 multi-drop breakout boxes

Process Control | Filter characterization with differential pressure control

Characterize a filter’s flow versus pressure drop curve by fixing the differential pressure across the filter using the pressure controller. The mass flow meter displays the resulting flow rate required to attain the pressure drop.

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