You may be referring to the Condenser Needle

A 38L pneumatic portable fogger that operates on compressed air

but avoid abrading the paper

Dilute it 1:1 for tough jobs

Tramex Feedback Datalogger Ez Kit Base UOM:EACH You may be referring toTramex FBZK Feedback Datalogger Ez Kit Compact Kit For Logging Ambient And In Situ Relative Humidity, Temperature, Dew Point & Humidity Ratio In Buildings And Building Materials With Accompanying Bluetooth App The Tramex FBZK is a compact kit designed for professionals who depend on accurate, reliable live & logged readings of relative humidity, temperature, dew point and humidity ratio. Monitor both ambient and in situ conditions in buildings and