What battery for a TST sensor & how to replace?Updated 7 months ago

The newer TST cap-style sensors (pictured at left) take a CR2032 coin battery. This type of sensor requires a small adjustable wrench to open the case. A small wrench came with your TST system originally,

If you have the type of sensor pictured at right, it will need a CR1632 coin battery. This type of sensor requires a jeweler's screwdriver to remove 3 small screws.

Both types of battery are easy to find at general merchandise stores, drug stores, and online.

To replace the battery in a 2020 and later sensor, see the PDF below:

When replacing batteries, we recommend also replacing the O-ring. You can see the procedure in this video. Spare O-rings were provided with your TST kit when you bought it, and if you need more you can order the spare parts directly from TST.