Protimeter salt calibration check, 75% RH
A sealed test bottle holding a stable 75 per cent relative humidity environment, for verifying that a Protimeter humidity probe is reading correctly.
Specifications
| Part number | BLD4790 |
|---|---|
| Nominal humidity | 75% RH |
| Method | Saturated salt solution test bottle |
Compatible meters
- Protimeter MMS3
- Protimeter MMS2
- Protimeter HygroMaster 2
- Protimeter HygroMaster L
Important — the adaptor is a separate part
The salt check bottle does not include the adaptor. For MMS2, HygroMaster 2 and HygroMaster L use the BLD4790-AD adaptor, ordered separately.
Why 75 per cent
The humidity readings that decide something — a slab too wet to lay over, a structure not yet dry, a dew point calculation on a drying job — sit at the upper end of the range. A probe checked only at the low end has not been checked where the decisions are made.
This verifies the probe. It does not calibrate it. A probe that fails needs replacing — see the short QuickStick sensor.
Related parts
- Salt calibration check adaptor (BLD4790-AD) — required to connect the probe to the bottle
- Hygrostick (POL4750) and Quickstick ST (POL8751) — replace a sensor that will not come back to 75%
- Calcheck device (BLD5086) — the equivalent check for pin meters rather than humidity probes
Meters this fits
- Protimeter MMS3 — and the MMS2 it replaced
- Protimeter HygroMaster 2
- Protimeter HygroMaster L
Tell us which Protimeter you run and we will confirm the right part before you order.
