Thermo-hygrometer with relative humidity sensor:

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HydraMaster TMTG4000™ Truckmount to Go™ Mobile Cleaning and Restoration Plant

and if you cannot

It is an effective gum and bitumen remover and it remains in our range

Tramex Water Damage Restoration Master Kit - WDMK-X US Products Thermo-hygrometer with relative humidity sensor:Tramex Water Damage Restoration Master Kit X WDMK X For evaluation and monitoring of water damage related moisture content and humidity in buildings WITH ACCOMPANYING BLUETOOTH APP The Tramex Water Damage Restoration Master Kit X is the topmost kit including the top of the range digital meters for moisture content and relative humidity testing and monitoring of ambient conditions, concrete, wood, tiles, drywall, plaster and numerous building materials