The TA383 Humidity Indicator series was originally intended to protect internal combustion engine cylinders. They are installed into the spark plug hole which matches the 18x1.5 metric thread on this humidity indicator. These indicators are provided with a synthetic rubber o-ring to provide a tight seal with minimal torque.

The standard item is supplied with 40% cards but other humidity indicator cards are available upon request.

TA383 Humidity Indicators will withstand a minimum internal pressure of 20 psig.

Weight: 15 grams