The Model 18x/286 instruments provide universal bench-top calibration which provides for quick and simple calibration of the instrument for a specific sensor. Calibration can be performed in an open or closed dewar environment. When the sensor is submerged at the 100% level, simply push the "MAX" button. When the liquid level is at the 0% level, push the "MIN" button. The calibration pushbuttons are recessed to prevent accidental operation.

The Model 18x/286 instruments also allow the user to calibrate between various liquids with differing dielectrics. Once the Model 18x/286 is calibrated using a common cryogenic liquid such as nitrogen, a dielectric constant ratio of the target liquid can be entered into the instrument. Also, the Model 18x/286 instruments have the capability to transform partial length sensor calibration into full length sensor calibration. This is especially useful for long sensor applications where standard calibration procedures are impractical.