
Single Channel MicroAir II
- Contact closure input from O.D. gauge
- 0.1" water resolution with digital display
- Hysteresis-free viscostatic damping action
CE Compliant
Made in the USA
On Line Controls' MicroAir pressure regulators are precision-engineered ultra-low air pressure controllers designed for plastic tubing extrusion lines. Available in single, dual, and multi-channel configurations with manual or PLC-compatible control, they deliver hysteresis-free regulation, sub-0.1-second response times, and 10–20+ year service life for medical, automotive, and industrial tubing applications.










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On MicroAir regulators, pressure is increased by adjusting the 30-turn precision knob (manual models) clockwise to raise the set point, or by increasing the 0–10V analog input signal on PLC-compatible models. Each unit accepts factory air regulated down to 45–55 psi and outputs ultra-low pressures from below 1 inch of water up to 5 psi with high repeatability.
Talk to our experts for custom solutions and tailored guidance.

Precise ultra-low pressure regulation ensures consistent wall thickness and OD for catheters and medical-grade tubing extrusion.

Stable hysteresis-free air pressure control maintains tight dimensional tolerances in automotive fuel, vacuum, and fluid tubing extrusion.

MicroAir regulators maintain constant internal air support during free extrusion of plastic profiles, straws, and specialty tubing.

Multi-channel MicroAir units independently control each lumen's air pressure, enabling precise structure and diameter in complex tubing.
Talk to our experts for custom solutions and tailored guidance.
MicroAir regulators deliver hysteresis-free control down to below 1 inch of water, maintaining constant pressure across widely varying flow rates for flawless tubing dimensions.
Founded in 1980, OLC is the recognized industry leader in ultra-low air pressure regulation, trusted by medical, automotive, and plastic tubing manufacturers across 18 countries.
Every MicroAir unit ships with a 3-year parts and labor warranty, unlimited phone support, and no calibration requirements — backed by 10–20+ year product service life.
Submit your inquiry and our engineering team will respond with a tailored MicroAir recommendation and pricing within one business day.
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.