The Accutire Monitor by Measurement Ltd. is an affordable alternative to wheel-mounted TPM systems. Special features of the Accutire Monitor include:
Four specially-designed caps that can be programmed with the correct tire pressure for each vehicle using a digital tire gauge.
Once caps are placed on the tire valve, they stay in 'sleep' mode. Users need only hold the monitor gauge next to the cap to read the tire's air pressure.
A green cap indicates a satisfactory tire pressure of 90-120 percent.
A yellow cap indicates a slightly under-flated pressure of 80-90 percent.
A red cap indicates under-inflation below 80 percent of pressure.
A blue cap indicates the tire is over-inflated by more than 120 percent.