Computer Programmable Pressure Controllers
Description
Computer Programmable Pressure Controllers are devices designed to regulate pressure by receiving inputs from pressure sensors, executing control functions, and outputting control signals. These controllers can manage both positive and negative (vacuum) pressures and are equipped with advanced features such as self-tuning, programmable set points, and built-in alarms or indicators. They can be configured with either analog or digital user interfaces, allowing for precise adjustments and monitoring of pressure levels.
Working Principle
The working principle of computer programmable pressure controllers involves the use of various control strategies to maintain desired pressure levels. These controllers utilize proportional, integral, and derivative (PID) control, among other methods, to achieve automatic closed-loop operation. Digital pressure controllers, in particular, can dynamically adjust their PID values through gain scheduling, allowing them to respond effectively to real-time changes in operating conditions. This adaptability makes them highly useful in maintaining stable pressure in dynamic environments with varying inlet pressures, leaks, and back pressures.
Applications
Computer Programmable Pressure Controllers are used in a wide range of applications. For example, they are employed in fluidic processes where precise pressure regulation is critical. They are also used in systems that require automatic adjustments of output pressure, such as those involving proportional pressure regulators that interact with programmable logic controllers (PLCs). These controllers are essential in industries where maintaining consistent pressure is vital for operational efficiency and safety.
Advantages over other Pressure Controllers
One significant advantage of digital pressure controllers over analog ones is their ability to easily alter calibration settings through a software interface, which can be done in the field without the need for hardware modifications. Additionally, digital controllers can adjust their PID values in real-time, providing superior performance in dynamic conditions where analog controllers may struggle to maintain stability. This flexibility and ease of use make digital pressure controllers a preferred choice in many applications.
Limitations
Despite their advantages, computer programmable pressure controllers have limitations. For instance, the complexity of digital systems may require more sophisticated troubleshooting and maintenance compared to simpler analog systems. Additionally, the initial cost of digital controllers can be higher due to their advanced features and capabilities.
Considerations
When selecting a computer programmable pressure controller, several factors should be considered. Initial costs can be significant, especially for digital controllers with advanced features. Operating expenses may vary depending on the complexity of the system and the need for regular maintenance. Durability and accuracy are crucial, as these factors impact the long-term reliability and performance of the controller. Replacement and maintenance costs should also be evaluated, as they can influence the overall cost-effectiveness of the system.
from Bronkhorst USA
Bronkhorst ® model P-802CI Process Pressure Controllers (PPCs) are suited for precise pressure control with closed volumes, i.e. with one fluid connection. This PPC model is suited for pressure ranges between 17,5 …350 mbar and 3,2 …64 bar absolute or gauge. The instrument... [See More]
- Interface: Computer Programmable
- Features: PC-Based
- Control: PID
- Inputs: 1
from Emerson Automation Solutions – TESCOM Regulators, Valves & Systems
TESCOM ™ ER3100 Series is the ER3000 controller and 44-4000 Series pressure reducing regulator integrated together. Inlet pressures are up to 4500 PSIG [310 bar] with two different outlet ranges of 400 PSIG and 900 PSIG [27.6 and 64 bar]. The ER3100 Series may be ordered with a Cv=0.7 or a... [See More]
- Interface: Computer Programmable
- Form Factor: Chassis
- Control: Linear; PID
- Inputs: 1
from Vogtlin Massflow USA
The new electronic red-y smart pressure controllers combine the reliable technology our of thermal mass flow controllers with electronic pressure control.The devices automatically control a predefined process pressure and at the same time measure and/or limit the flow rate.On-the-fly switching... [See More]
- Interface: Switches; Digital Front Panel; Computer Programmable; Network
- Control: PID; Nonlinear; Other; Select Pressure or Flow
- Controller Type: Pressure + Flow Controller
- Features: Datalogger; Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control
from Brooks Instrument
With a wide range of options and features available, the SLA5800 Series pressure controllers enable you to automate your pressure control and take advantage of the process consistency benefits from using a single platform when combined with our industry-leading SLA5800 Series mass flow controllers... [See More]
- Interface: Computer Programmable; Network
- Control Outputs: 1
- Inputs: 1
- Control Signal: Serial / Digital; Network / Fieldbus Output; Other; RS485, DeviceNet™, Profibus®
from Florite International, Inc.
The 900 Series is an economic one loop microcomputer-based instrument incorporating user selectable digital and analog inputs, as well as analog and relay outputs. Other 900 Series features include .005% high accuracy PID, batch, and dose control functions. Additionally, the 900 Series encompasses... [See More]
- Interface: Digital Front Panel; Computer Programmable; Network
- Control: Limit; Linear; Feedforward; PID
- Controller Type: Laboratory
- Features: PLC; Multi-Function; Datalogger; Is a Chart Recorder; Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control
from Bronkhorst USA
Bronkhorst ® model P-812CI Process Pressure Controllers (PPCs) are suited for precise pressure control with closed volumes, i.e. with one fluid connection. This PPC model is suited for pressure ranges between 3,2 …64 bar and 5 …100 bar absolute or gauge. The instrument comprises a... [See More]
- Interface: Computer Programmable
- Features: PC-Based
- Control: PID
- Inputs: 1
from Emerson Automation Solutions – TESCOM Regulators, Valves & Systems
Easy to automate, Easy to use, Easy on you!. Get repeatable, accurate and robust pressure control results, easy to use software with remote capabilities and detailed data acquisition. The ER5000 Series is a microprocessor based PID (Proportional, Integral, Derivative). controller that brings precise... [See More]
- Interface: Computer Programmable; Web
- Form Factor: Chassis
- Control: Linear; PID
- Inputs: 1
from Vogtlin Massflow USA
The new electronic red-y smart pressure controllers combine the reliable technology our of thermal mass flow controllers with electronic pressure control.The devices automatically control a predefined process pressure and at the same time measure and/or limit the flow rate.On-the-fly switching... [See More]
- Interface: Switches; Digital Front Panel; Computer Programmable; Network
- Control: PID; Nonlinear; Other; Select Pressure or Flow
- Controller Type: Pressure + Flow Controller
- Features: Datalogger; Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control
from Brooks Instrument
Whether it ’s dust, moisture, temperature extremes or wash-down requirements, the SLAMf Series elastomer sealed pressure controllers deliver the precise accuracy and long-term stability of our proven SLA5800 family of thermal mass flow meters and controllers. A specially engineered NEMA4X/IP66... [See More]
- Interface: Computer Programmable; Network
- Control Outputs: 1
- Inputs: 1
- Control Signal: Analog Voltage Output; Current Loop Output; Serial / Digital; Network / Fieldbus Output; Other; RS485, DeviceNet™, Profibus®
from Florite International, Inc.
The Florite Model 990X is an innovative, technically superior, high quality and reliable microcomputer-based controller suitable for any commercial or industrial application. The instruments user configurable screw-terminal channels enable any mix of up to eight inputs and or outputs regardless of... [See More]
- Interface: Digital Front Panel; Computer Programmable; Network; Web
- Control: Limit; Linear; Feedforward; PID
- Controller Type: Laboratory
- Features: PLC; Multi-Function; Datalogger; Is a Chart Recorder; Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control
from Bronkhorst USA
Bronkhorst ® model P-822CI Process Pressure Controllers (PPCs) are suited for precise pressure control with closed volumes, i.e. with one fluid connection. This PPC model is suited for pressure ranges between 5 …100 bar and 10 …200 bar absolute or gauge. The instrument comprises a... [See More]
- Interface: Computer Programmable
- Features: PC-Based
- Control: PID
- Inputs: 1
from Vogtlin Massflow USA
The new electronic red-y smart pressure controllers combine the reliable technology our of thermal mass flow controllers with electronic pressure control.The devices automatically control a predefined process pressure and at the same time measure and/or limit the flow rate.On-the-fly switching... [See More]
- Interface: Switches; Digital Front Panel; Computer Programmable; Network
- Control: PID; Nonlinear; Other; Select Pressure or Flow
- Controller Type: Pressure + Flow Controller
- Features: Datalogger; Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control
from Bronkhorst USA
Bronkhorst ® model P-802CV Process Pressure Controllers (PPCs) are suited for precise pressure control with closed volumes, i.e. with one fluid connection. This PPC model is suited for pressure ranges between 17,5 …350 mbar and 3,2 …64 bar absolute or gauge. The instrument... [See More]
- Interface: Computer Programmable
- Features: PC-Based
- Control: PID
- Inputs: 1
from Vogtlin Massflow USA
The new electronic red-y smart pressure controllers combine the reliable technology our of thermal mass flow controllers with electronic pressure control.The devices automatically control a predefined process pressure and at the same time measure and/or limit the flow rate.On-the-fly switching... [See More]
- Interface: Switches; Digital Front Panel; Computer Programmable; Network
- Control: PID; Nonlinear; Other; Select Pressure or Flow
- Controller Type: Pressure + Flow Controller
- Features: Datalogger; Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control