Amazon.com: Gozens 26-80psi TPMS Tire Pressure Monitor …

2. If the tire pressure cap is dropped accidentally, dust or dirt will be in the thread of the cap, which will cause the joint not tight enough and the air-leaking. In this case, the product will always leak the air. These easy to install replacement valve caps constantly monitor your tire pressures with clear, bright color indicators.

https://www.amazon.com/Gozens-26-80psi-Pressure-Monitor-Indicator/dp/B01HRIK7K0