'deep wall' probes will allow you to reach up to a nominal depth of 130mm into a wall

Vacuum release valve – prevents suction lock-down when paired with high-powered vacuum systems

then this is the model for you

causing the leather to dry and shrink

Leather Master Protection Cream is a water-based protector that places an invisible

Tramex Concrete Moisture Encounter X5 – CMEX5 Switches 'deep wall' probes will allowTramex CMEX5 Concrete Moisture Encounter X5 The Tramex Concrete Moisture Encounter X5 CMEX5 is a non destructive digital multi moisture meter for concrete floors and slabs providing an instant and precise quantitative measurement of moisture content using Gravimetric testing as a baseline. The CMEX5 also provides Carbide Method equivalent readings for concrete and other cementitious substrates as well as comparative readings as per ASTM F2659.