On Line Controls manufactures two products.

1.  MICROAIR - Since 1984 OLC has been manufacturing  MicroAir, ultra low air pressure regulators and controllers.    High reliability and precision have made us the number one air pressure manufacturer for plastic tubing extrusion makers. 

2.  MOTORIZED POTENTIOMETERS - The line was purchased from ETI Systems in 1999.  On Line Controls repairs, manufactures and sells motorized potentiometer and motorized reheostats.