Concrete sleeve for in-situ relative humidity testing
The plastic sleeve that lines the drilled hole in a concrete slab for an in-situ relative humidity test to ASTM F-2170. Supplied 3 inches (75 mm) long and easily cut to the depth the slab needs.
Fitment
Important — use it with the S3, not the S1
This sleeve is sometimes described as suitable for any of the RH/T-S1, S2 or S3 sensors. That is wrong, and we would rather say so plainly. Delmhorst specifies the sleeve for use with the RH/T-S3. The RH/T-S1 is an ambient sensor for reading room conditions and is not an in-situ probe. A test set up with the S1 is not an ASTM F-2170 test and the result will not stand up if the floor is later disputed.
Specifications
| Part number |
CS-3 |
| Length |
3 inches (75 mm), cut to suit |
| Material |
Plastic |
| Standard |
Required for in-situ RH testing to ASTM F-2170 |
| Sold as |
Each |
How the sleeve is used
The hole is drilled to the depth the standard specifies for the slab, cleaned out, and the sleeve inserted and capped. The sleeve isolates the measurement from the air above the slab so the sensor reads the humidity of the concrete at that depth rather than the room. The hole is then left to equilibrate before any reading is taken — this is the step most often skipped, and skipping it is what produces a reading that later turns out to be wrong.
Frequently asked questions
How many do I need?
One per test location. ASTM F-2170 sets the minimum number of locations by floor area — check the current edition for the slab you are testing.
Do I get the sleeve back?
No. The sleeve stays in the slab; the sensor is reusable.
Can I cut them shorter?
Yes, that is what they are designed for. Cut to the depth the standard requires for your slab thickness.
Not sure which part fits your meter or electrode? Send us the model and what you are testing, and we will confirm the correct part before you order.
