PCS–Series: Anti-Corrosive Differential Pressure Controllers

PCS-Series Anti-Corrosive Differential Pressure Controllers control the differential pressure between any two points in your process – for all non-corrosives, select corrosives, and a variety of liquids.

Aggressive gas compatibility. Wetted materials compatible with 32+ pure corrosive gases and most refrigerant gases, in addition to all non-corrosive gases and a variety of liquids.
Versatile control. Maintain differential pressure between any two points or keep one port open to atmosphere and control gauge pressure, with readings displayed in your choice of engineering units.
Fast & accurate. Reach pressure setpoints in milliseconds and maintain stable control, with NIST-traceable accuracy to ±0.125% of full scale.
Easy integration. Custom process ports and electrical connectors, and your choice of EtherNet/IP, EtherCAT, DeviceNet, PROFIBUS, PROFINET, Modbus (RTU and TCP/IP), or serial communications for easy integration into your industrial process.

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Accessories included with purchase

FlowVision software (free download)

Device specs and customization options

Quick Specs

Differential PCS-Series performance

Available full-scale ranges: 5 PSID to 500 PSID
Steady state control range: 0.5% – 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 30 ms
Warm-up time: <1 s

Differential PCS-Series operating conditions

Compatible fluids: All non-corrosive gases, select corrosive gases, and chemically compatible liquids
Operating temperature: –10°C to +60°C
Max common mode pressure: 3x full scale (1.5x full scale for 500 PSID devices)

Device Ranges & Full Specs

Devices are custom ranged from 5 PSID full scale to 500 PSID full scale with controllable ranges of 0.5% to 100% of full scale.

For specs on all device ranges, see the PCS-Series device specs.

For a comprehensive device guide, read the pressure controller operating manual.

Device Features

Included with each device

User changeable units of measurement: Change the unit of measurement for pressure from our extensive list of engineering units.
Monochrome backlit LCD with integrated touchpad: Easily read measurements using the backlit display and control configurations with the user-friendly integrated touchpad.
User adjustable setpoint ramping & limits: Configurable ramp rates allow the process variable to be controlled as fast or as slow as desired, and configurable setpoint limits protect processes from inadvertent setpoint changes.
Valve close override and valve open override: Utilize alarms to quickly vent your system or stop all flow as needed.

Request at time of purchase | Additional cost

Optional integrated potentiometer control: Use the integrated potentiometer to adjust setpoints with the simple turn of a knob.

Device Customization Options

Build and performance options

Communication protocols: Analog, RS–232, RS–485, DeviceNet, EtherCAT, EtherNet/IP, Modbus RTU or TCP/IP, PROFIBUS, PROFINET
Displays: Backlit monochrome or color; integrated or panel–mount
Process connections: NPT, SAE, AN, BSPP/G, compression, VCR, or VCO fittings
Wetted materials: 316L stainless steel; FFKM standard, FKM, or EPDM as needed for some gases
Calibration: High-accuracy; custom calibration points

Visit the device customization page

Valve options & PID tuning

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
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

Note: Certain gases (including SO₂ and Cl₂) require PC with PCA designation.

Custom PID valve tuning ensures maximum performance for your specific process conditions.

Learn about valve sizing and PID tuning options

Optional Accessories

Accessories | Sold separately

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

Visit the accessories page

Not exactly what you’re looking for?

Explore other single valve pressure control options, including non-corrosive and absolute/gauge pressure devices.
Check out our other pressure or flow control and measurement solutions.
Our expert team of applications engineers is available to provide additional information, discuss your application, or answer any questions you may have.

Contact an applications engineer

Learn about diverse pressure control applications in our knowledge base

Alicat PCS-Series differential pressure controller

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Brochure Manual PCS-Series device specs

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