Precision Vacuum & Pressure Controllers for Advanced Process Control
Modern research, industrial, and process environments demand precise control over vacuum and pressure conditions. Electronic Vacuum Controllers (EVCs) and Electronic Pressure Controllers (EPCs) are advanced devices engineered to deliver this precision. They ensure stable, repeatable, and accurate control of gas or air pressure across a wide range of applications — from laboratory research to manufacturing automation.
At Pneucleus Technologies LLC, we design and manufacture microprocessor-based EVCs and EPCs that combine intelligent feedback control with compact, robust construction. These controllers integrate high-accuracy sensors, electronically actuated proportional valves, and temperature compensation circuitry to deliver consistent performance in dynamic environments.
How an Electronic Vacuum Controller (EVC) Works
An Electronic Vacuum Controller regulates absolute pressures between approximately 2 psiA and 14.7 psiA, where 14.7 psiA represents atmospheric pressure at sea level. The EVC combines three primary components — an absolute pressure sensor, a proportional control valve, and an electronic feedback loop — to achieve precise pressure regulation.
In a typical configuration, the proportional valve’s output port connects to a high-vacuum source, while its input and sensor ports connect to the volume being controlled. The internal pressure sensor continuously monitors the absolute pressure of this volume.
When the monitored pressure rises above the user’s setpoint, the sensor sends a corresponding electrical signal to the controller. The controller then commands the proportional valve to open, allowing gas to flow from the controlled volume to the vacuum source. This action lowers the pressure within the chamber. Conversely, when the pressure drops below the setpoint, the valve closes proportionally, maintaining a steady pressure level.
This closed-loop operation provides extremely fine control and compensates for fluctuations in load, gas flow, or ambient conditions. Different configurations of EVCs are available depending on the vacuum source, desired control dynamics, and process characteristics. A Pneucleus Sales Engineer can assist in identifying the optimal configuration for your specific system requirements.
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How an Electronic Pressure Controller (EPC) Works
An Electronic Pressure Controller regulates pressure above atmospheric levels, making it ideal for applications such as gas chromatography (GC) columns, inflatable bladders, test chambers, or process reactors. Its primary function is to maintain the pressure of a gas-filled volume at a user-defined setpoint.
Like an EVC, the EPC employs a pressure sensor, proportional valves, and a feedback loop. However, in this case, the controller manages both gas injection and gas bleed functions. When pressure falls below the setpoint, the controller opens a valve to admit gas into the volume, increasing the pressure. Conversely, when the pressure exceeds the setpoint, a bleed valve or bleed orifice allows gas to escape, reducing the pressure.
This dual-action control ensures the internal pressure remains tightly regulated, even under changing flow conditions or varying external loads. The precise design of Pneucleus EPCs allows for smooth pressure transitions without overshoot or oscillation — a critical factor for processes requiring steady-state operation.
Advanced Features of Pneucleus Digital Vacuum & Pressure Controllers
Pneucleus Technologies offers a family of compact, digital controllers — including the MicroPC, DoublePC, and MicroVC — each designed for high accuracy, reliability, and performance stability. Built on advanced microprocessor platforms, these units integrate real-time data acquisition, closed-loop proportional control, and robust sensor calibration to ensure consistent output under diverse operating conditions.
Key Performance Features
High Accuracy and Linearity: Each controller achieves a typical linearity of ±0.5–1.0% of Full Scale (FS), ensuring dependable performance in precision-sensitive systems.
Exceptional Repeatability and Hysteresis: With ±0.08% FS repeatability, the devices deliver consistent results over extended operation, minimizing drift and ensuring stable control cycles.
Temperature Compensation: Fully compensated from 0–85°C, these controllers maintain accuracy across typical industrial and laboratory environments, reducing thermal error.
Fast Response Times: Response depends on the system’s internal volume, gas type, and valve orifice size. Pneucleus engineers can provide application-specific timing data to match your process requirements.
Compact and Robust Design: Our controllers are engineered for tight integration in OEM equipment or laboratory benches, saving valuable space without compromising durability or performance.
Flexible Sensor Options: Units are available with gauge or absolute sensors. Gauge sensors use local atmospheric pressure as a reference, while absolute sensors employ an internal vacuum cell, making them ideal for low-pressure or sealed systems.
Intelligent Safety and Control Functions: Many models can report real-time pressure, execute failsafe shutdowns, or adjust automatically within user-specified control bands to maintain stable operation.
Typical Applications
Pneucleus EVCs and EPCs are used across industries where precision vacuum or pressure control is critical. Some of the most common applications include:
Semiconductor and Manufacturing Processes: Maintain consistent vacuum levels for thin-film deposition, coating, molding, or packaging operations.
Vacuum Pumping Systems: Regulate vacuum in degassing, drying, or environmental simulation systems for improved control and process reliability.
Cryogenics: Manage vacuum insulation in low-temperature systems to minimize heat transfer and improve cryogenic efficiency.
Research and Laboratory Instruments: Provide stable control for mass spectrometers, vacuum chambers, leak testers, or electron microscopes.
Pharmaceutical and Biotech Production: Ensure precise pressure conditions during freeze-drying, filtration, and sterile product packaging processes.
Food and Beverage Packaging: Support vacuum-sealing systems to extend product shelf life and maintain quality consistency.
These applications benefit from the controllers’ ability to maintain reliable performance under varying loads, temperature conditions, and operating pressures.
How to Choose the Right Controller
Selecting the ideal vacuum or pressure controller for your process requires careful consideration of several parameters. Pneucleus Technologies provides engineering guidance to help you match your system needs with the right product configuration.
Key Selection Factors
Define System Requirements: Identify whether you need vacuum or positive pressure control, and specify the target pressure range and control precision.
Pressure Range: Ensure the chosen model supports your system’s full operating range. Pneucleus controllers can be configured for ranges up to 150 psi.
Accuracy and Linearity: For high-precision applications, select controllers with ±0.5% FS linearity or better to maintain consistent performance.
Response Time: Systems requiring rapid pressure changes benefit from smaller valve orifices and optimized feedback tuning.
Repeatability and Hysteresis: Low hysteresis and high repeatability (e.g., ±0.35% FS) ensure steady results during long-term operation.
Temperature Stability: Choose temperature-compensated models if your process involves fluctuating or extreme ambient conditions.
Energy Efficiency: For continuous operation or portable systems, consider low-power variants that reduce energy consumption.
Control Interface: Select controllers offering the communication interface you need — analog, digital, or hybrid — for easy integration with PLCs or PCs.
Support and Warranty: Partner with a manufacturer that provides responsive technical assistance and comprehensive warranty coverage for long-term reliability.
Partner with Pneucleus Technologies
At Pneucleus Technologies LLC, we understand that every vacuum or pressure control system is unique. Our Sales Engineers work closely with customers to design or configure controllers that meet exact process and performance needs. Whether you require a high-speed pressure response, ultra-stable vacuum control, or dual-channel regulation, we provide a tailored solution backed by engineering expertise and dependable support.
