HT.w records once per minute and stores more than a month of readings on the sensor. A phone can receive data within Bluetooth range. If checking conditions while away is the reason for buying, account for the separate G1 gateway and the connection it needs; the sensor by itself is not an internet gateway.
The manufacturer’s humidity specification is conditional: at 25 C and 10–90% RH, typical accuracy is ±2% and maximum error is ±4.5%. The maker also describes temporary offset after prolonged exposure above 80% RH. Those conditions matter more than presenting a single accuracy number without context.
Choose it for trends rather than an on-device display
This model makes sense when a record over time or an app-based view is more useful than a visible number on a shelf. TempPro TP50 serves the simpler local-display role. Water resistance does not make HT.w a standing-water leak detector or establish that it can be submerged.
