Liquid Filled Tire Gauges

Liquid Filled Tire Gauges. All liquid filled gauges are purposely filled to just 80%. The remaining 20% air pocket helps allow for thermal expansion and contraction as ambient temperature changes, thereby maintaining accuracy. Liquid filled gauges have many advantages, but they can change readings by as much as 2-3 psi if the temperature changes. Now from Longacre comes the simple answer to this problem. We have installed a specially designed pressure equalizer valve on the top of the gauge. Instantly any temperature-caused pressure difference will be eliminated and you will be guaranteed the most accurate readings possible.