Tramex RHIH – Insulated RH Hood
An insulated hood that seals to the floor surface and allows relative humidity to equilibrate beneath it, for non-destructive surface RH testing of concrete and other floors and screeds.
Non-destructive, and that is the point
AS 1884-2012 is the Australian standard for resilient floor coverings, and the surface hood method it describes does not require drilling into the slab. On a finished floor, in a tenanted building, or where the slab is post-tensioned and drilling is not an option, that matters a great deal.
It is a different test from in-situ ASTM F2170, which measures humidity at depth inside the slab. Neither replaces the other. Check which one your flooring specification calls for before you test, not after.
What else you need
The hood works with a Hygro-i2 relative humidity probe and the interface cable matching your meter – RHIE2 for the CMEX2 and MRH3, or RHIE2B for the CMEX5, MEX5 and DL-RHTX. The hood itself is not connector specific.
Specifications
| Type | Insulated surface RH hood |
| Standard | Surface RH testing to AS 1884-2012 |
| Method | Non-destructive – no drilling |
| Used with | Tramex Hygro-i2 probes on CMEX2, CMEX5, MEX5, MRH3 and DL-RHTX |
Documents
Frequently asked questions
Is a hood test accepted instead of an in-situ test?
It depends entirely on the specification. AS 1884-2012 describes the surface hood method; ASTM F2170 requires in-situ probes at depth. Flooring manufacturers' warranties often name one specifically. Read the specification before choosing the method – a correct test to the wrong standard is still a failed compliance check.
How long does the hood need to sit?
Long enough for the air beneath the hood to reach equilibrium with the slab surface. Lifting it early gives a reading of the room, not the floor.
Why does it need to be insulated?
Because a temperature difference between the hood and the slab drives condensation and skews the humidity reading. Insulation keeps the air space at slab temperature so the RH measured is the slab's.
Can it be used on a post-tensioned slab?
Yes, and that is one of its main uses. Post-tensioned slabs cannot be drilled without risk to the tendons, which rules out in-situ testing and leaves the surface hood method.
Contact Carpet Cleaners Warehouse if you need help deciding which RH test method your specification requires.
