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Pressure meters and controllers for gas

Fast pressure controllers keep your process stable and repeatable. With the Alicat units we offer many ways to customize your pressure controller for use in flowing, dead-ended or vacuum applications. Dual-valve models for closed volumes eliminate the need to continuously bleed expensive process gases. Instruments are available with absolute, gauge or differential pressure sensors for pressure control as high as 3000 psia/psig (or 150 psid) and as low as 10 torr.

Making You Faster

  • Numerous user-selectable engineering units.
  • Includes COMPOSER™ gas composition firmware.
  • Extreme quick response time: 10 ms for meters, 50…100 ms for controllers.
  • No warm-up required: ready to operate in one second.
  • Stand-alone unit: no need for computer or PLC.
  • All flow data visible on one screen (metering mass flow, volumetric flow, absolute pressure, temperature).
  • Digital and analog outputs.
  • network integration by RS232 / RS485 and different bus protocols
  • For controllers: easy to handle valve adjustment

Common Mass Flow Metering Instrument Options

  • High-accuracy calibration (HC option)
  • Bidirectional flow calibration, enables full-scale readings in both flow directions.
  • Integrated flow totalizer, provides cumulative readings of total quantity flowed over time.
  • CSA Class 1 Division 2 (ATEX Zone 2) Area Classification, permits operation in hazardous environments.
  • 9-pin or 15-pin D-sub connectors, configured to match any existing pinout.
  • Modbus-RTU, available over RS-232 or RS-485. PROFIBUS also available.
  • Backlit color display, shines in low lighting environments.

PC Standard Series Pressure Controller

Single-valve pressure controllers from Alicat are designed to rapidly control the pressure of flowing processes. They are available with internal pressure sensors or remote sensors that can be plumbed to any point in your process.
PC Specs
Absolute or gauge pressure

PC-series absolute or gauge pressure controllers contain pressure sensors that are referenced to vacuum (absolute) or to local barometric pressure (gauge). PC3-series absolute or gauge pressure controllers have flow paths that are isolated from their pressure sensors. Instead, an external pressure sense port can be plumbed to measure pressure at any point in your system.

The EPC series condenses our single-valve PC series absolute or gauge pressure controller into a bare-bones form factor that is ideal for OEM applications and large-quantity orders.

Differential pressure

PC-series differential pressure controllers maintain a constant pressure differential between their two measurement ports. Like the PC3 above, each of the two pressure measurement ports of the differential pressure controller can be plumbed to any point in your process.

PCD Dual-valve pressure controller for closed volumes

Dual-valve pressure controllers from Alicat eliminate the need for a bleed valve for pressure control in closed or dead-ended volumes. They are available with internal pressure sensors or remote sensors that can be plumbed to any point in your process.
Absolute or gauge pressure

PCD-series absolute or gauge pressure controllers contain pressure sensors that are referenced to vacuum (absolute) or to local barometric pressure (gauge). In addition to inlet and outlet ports, a third process port connects the sensor to your closed volume. PCD3-series absolute or gauge pressure controllers have flow paths that are isolated from their pressure sensors. In addition to the process port, an external pressure sense port can be plumbed to measure pressure directly from any point in your closed system.

The EPCD series compacts our dual-valve PCD series absolute or gauge pressure controller into a bare-bones form factor that is ideal for OEM applications and large-quantity orders.

Differential pressure

PCD-series differential pressure controllers maintain a constant pressure differential between their two measurement ports. Like the PCD3 above, each of the two pressure measurement ports of the differential pressure controller can be plumbed to any point in your process.

PCD Differential Pressure Controller

Differential pressure instruments from Alicat have sensors that measure the difference in pressure between any two points in your process. If you leave the downstream port open to atmosphere, the differential pressure readings become equivalent to gauge pressure readings, allowing differential pressure instruments to work as gauge pressure instruments as well.

P-series differential pressure transducers display the pressure difference between your two measurement points.  The PB-series differential pressure transducers add a rechargeable battery to make pressure audits easy.

PC-series differential pressure controllers use a single valve to maintain a constant pressure differential between their two measurement ports. Their flow paths are isolated from the two ports of the differential pressure sensor. Each of these two pressure measurement ports can be plumbed to any point in your process.

PCD-series differential pressure controllers use two valves to control pressure differentials for closed volumes. The second valve opens only to vent excess pressure from the system. Like the PC series above, each of the two pressure measurement ports of the PCD for differential pressure is isolated from the flow path and can be plumbed anywhere in your system.

P-Series Digital Pressure Transducers

Digital pressure transducers from Alicat provide real-time measurements of absolute, gauge or differential pressure.

Absolute or gauge pressure

P-series absolute or gauge pressure transducers reference pressure to vacuum (absolute) or to local barometric pressure (gauge).

PB-series absolute or gauge pressure transducers add a rechargeable battery to make your pressure transducer easily portable.

Differential pressure

P-series differential pressure transducers display the pressure difference between the two measurement points. If you leave the downstream port open to atmosphere, the differential pressure readings become equivalent to gauge pressure readings. The PB-series differential pressure transducers feature an integrated rechargeable battery.