Protimeter Humidity Box (for use with Protimeter MMS and Hygromaster) Base UOM:EACH HydraMaster lists it as a

HydraMaster lists it as a suggested spare across four of its truckmount models

Constructed from a heavy-duty polyethylene copolymer with an integrated reinforcement helix

(1) RHT-S3 humidity sensor

Drying at 21–25 °C and 50% relative humidity: touch dry 1 hour

Protimeter Humidity Box (for use with Protimeter MMS and Hygromaster) Base UOM:EACH HydraMaster lists it as aProtimeter humidity box for surface RH measurement A box that seals to a solid floor and lets the air beneath it equilibrate, so surface relative humidity can be measured without drilling. Specifications Part number BLD4711 Method Non destructive surface RH measurement in solid floors Compatible meters Protimeter MMS2 Protimeter HygroMaster 2 Protimeter HygroMaster L Surface box or in situ sleeve? They answer different questions. The humidity box