Protimeter adjustable humidity sleeves, 20 pack
Sleeves that hold a Hygrostick at the correct depth in a drilled hole so the air around it can reach equilibrium with the surrounding material.
Specifications
| Pack size | 20 |
|---|---|
| Type | Adjustable humidity sleeve |
| Used with | Protimeter mini Hygrosticks |
How the measurement works
A sleeve and a hygrostick are inserted into a drilled hole in a concrete slab, a wall cavity or any confined space, and sealed. The air in the sealed sleeve then equilibrates with the moisture in the surrounding material, and the humidity of that air is what the sensor reports.
The seal and the wait are the test. A sleeve that is not sealed reads the room; a sleeve read too early reads whatever it happened to reach.
Adjustable or fixed?
The adjustable sleeve is set to the depth the job requires. The BLD4902 original style sleeve is a fixed 43 mm x 16 mm. Which you need depends on the slab and the standard you are testing to.
Note on the part number
Our listing title carries both BLD4650-20 and BLD4650-50. This is the 20 pack. We have asked Protimeter to confirm the correct current part number and will tidy the title once they answer.
Matching the sleeve, the hole and the sensor
Three sleeve systems exist and they are not interchangeable. The sleeve has to seal in the hole, or the air inside it equilibrates with the room instead of the slab and the test is meaningless. Match all three columns before you drill.
| Sleeve | Hole size | Bit | Sensor it takes |
|---|---|---|---|
| BLD4650 adjustable | 19 mm (3/4 in) | BLD34DR | Mini Hygrostick (BLD4755-5) |
| BLD4902 original, fixed | 16 mm | Not stocked — ask us | Full-size Hygrostick (POL4750) |
| BLD4750HS — not stocked | 12 mm | BLD12DR | Full-size Hygrostick |
The 19 mm system is the one supplied in the Protimeter flooring kits and the one used for in-situ relative humidity testing to ASTM F2170. If you are working to BS 8201 or BS 8203, check which sleeve the specification calls for before ordering.
The 19 mm hole set
Four items make a repeatable hole. Missing any one of them shows up as inconsistent readings rather than as an obvious failure.
- Masonry drill bit, 19 mm (BLD34DR) — drills the hole
- Drill bit stop collar (BLD34DRCLR) — sets the depth so every hole is identical
- Hex key, 5/32 in (BLD34DRCLR-K) — tightens the collar
- Wire hole brush, 19 mm (BLD4653) — clears the dust, which otherwise sits against the sensor and slows equilibration
All four are supplied in the HygroMaster 2 Flooring Kit.
Tell us which Protimeter you run and we will confirm the right part before you order.
