Energy saving, archiving, storage, comfort: analysing temperature and humidity is of great importance in all these areas. The testo 175 H1 data logger takes over the long-term measurement and documentation of these values for you. The testo 175 H1 data logger measures and documents the temperature and relative humidity in buildings and enclosed spaces. Thanks to the external humidity probe (stub), a fast response time is guaranteed. The lock supplied protects your data logger from unauthorised access. In addition to the current temperature and humidity values, the data logger also shows the dew point on the display. Programmed limit values, minimum and maximum values, limit value violations and the remaining battery life can be easily read on the large display. The testo 175 H1 data logger guarantees high data security and reliable measurement results based on the latest measurement technology. Thanks to a large memory for up to 1 million readings and a battery life of up to 3 years, you rarely need to read out the data logger, even for shorter measurement cycles. The standard batteries (AAA) can be replaced by the user at any time if required.