MicroAir Sales
Ultra-low air pressure regulators for plastic extrusion manufacturing, available in single to 4-channel configurations with worldwide shipping capability.
Advanced pressure control systems engineered for precision manufacturing. Our MicroAir regulators and motorized potentiometers deliver ultra-low air pressure regulation with exceptional accuracy, ensuring optimal performance in industrial extrusion processes. Trusted by leading manufacturers worldwide for over 40 years of reliable operation.

Comprehensive pressure control solutions from sales to repair and technical support for industrial applications.
Ultra-low air pressure regulators for plastic extrusion manufacturing, available in single to 4-channel configurations with worldwide shipping capability.
Precision DC and AC motorized potentiometers with customizable resistance values, RPMs, and gang configurations for industrial control applications.
Professional repair services for MicroAir units under 10 years old, including testing, component replacement, and 3-year warranty coverage.
Expert repair and rebuilding services for both current and legacy motorized potentiometer models from the 1980s and 1990s.
Unlimited phone support for installation, troubleshooting, and maintenance guidance across all MicroAir models and configurations.
Engineered pressure control systems tailored to specific industrial requirements with ranges from 0-2 inches of water to 0-5 psi.
Our pressure systems deliver unmatched precision and reliability for industrial manufacturing processes. With ultra-low air pressure regulation capabilities and hysteresis-free operation, our solutions ensure consistent product quality and minimal maintenance requirements. Every system is manufactured in our Massachusetts facility with rigorous quality standards and backed by comprehensive technical support.

Leading manufacturers worldwide rely on our precision pressure control solutions for critical applications.
Four decades of engineering excellence in precision pressure control systems.
Ultra-low air pressure regulation with instant response and hysteresis-free operation for consistent results.
Products engineered for 10-25 year lifespans with minimal maintenance requirements and exceptional reliability.
All products manufactured in our Shrewsbury, Massachusetts facility ensuring quality control and rapid support.
Worldwide shipping capabilities serving customers across 18 countries with comprehensive technical support.
Experienced professionals dedicated to precision engineering excellence.
President
Kay DeWolfe serves as both owner and President of On Line Controls, Inc., bringing over 35 years of invaluable experience to the industrial pressure control industry. Under her leadership, the company has maintained its position as the recognized industry leader in ultra-low air pressure regulators for plastic tubing extrusion. Kay's extensive background in precision manufacturing and customer support has been instrumental in expanding OLC's global reach to serve customers across 18 countries while maintaining the highest quality standards. Her commitment to engineering excellence and customer satisfaction continues to drive the company's innovation in pressure control technology, ensuring that OLC's MicroAir and motorized potentiometer products remain the industry standard for precision and reliability.
What pressure ranges are available for MicroAir systems?
MicroAir systems offer ultra-low pressure ranges from as low as 0-2 inches of water up to 0-5 psi, designed specifically for precision control in plastic tubing extrusion applications.
How long do MicroAir pressure regulators typically last?
What warranty coverage is provided with new equipment?
Can older MicroAir units be repaired or serviced?
Do you provide international shipping and support?
What types of motorized potentiometers are available?
How quickly can repairs be completed?
What technical support is included with purchase?
Our engineering experts are ready to help with your pressure control requirements.
International shipping certified
Industry excellence recognition
Manufacturing excellence certified
Contact our engineering team for technical specifications, custom solutions, or expert consultation on your industrial pressure control requirements.
For immediate assistance, feel free to give us a direct call at 978-562-5353 You can also send us a quick email at olc@onlinecontrols.com
For immediate assistance, feel free to give us a direct call at 978-562-5353 You can also send us a quick email at olc@onlinecontrols.com