This manual introduces the Vaisala HUMICAP® HM44 for measuring the moisture content in concrete
The HM44 set from Vaisala is designed for reliable humidity measurement in concrete and similar structures. It includes the HMP44 humidity‑temperature sensor, the HMI41 handheld unit with batteries, installation caps, rubber plugs and plastic sleeves.
The manual covers product description, setup of the HMI41, measurement procedures, data logging, PC data transfer, calibration methods (one‑point and two‑point), routine maintenance, troubleshooting, spare‑part information and technical specifications. This manual is written in German.
| Installation cap dimensions | 64 mm thickness, 101 mm length |
|---|---|
| Rubber plug dimensions | 13 mm thickness, 28 mm length |
| Plastic sleeve dimensions | 17.4 mm thickness, 120 mm length |
| Measurement accuracy without individual corrections | ±4 %RH |
| Measurement accuracy with individual corrections | ±2 %RH |
| Maximum number of sondes per HMI41 | 10 (numbered 1‑10) |
Up to ten sensors can be connected, each assigned a number from 1 to 10.