Quick answer: The testo 162 is a family of display-equipped online data loggers. Choose the 162 H1 for integrated temperature/RH, the 162 H2 when a remote RH/temperature probe is needed, the 162 T1 for built-in temperature only, or the 162 T2 for two external NTC temperature probes. Configure the chosen logger over the supported Wi-Fi/cloud service and verify alarms.
Which testo 162 variant should you install?
| Model | Sensor arrangement | Main reason to select |
|---|---|---|
| 162 H1 | Integrated temperature + relative humidity | Compact room monitoring with local display |
| 162 H2 | Connector for external temperature/RH probe | Sensor position independent of logger housing |
| 162 T1 | Integrated temperature sensor | Single room or storage temperature location |
| 162 T2 | Two external NTC temperature-probe connections | Two points or cabinet interior/exterior temperatures |
The displayed family designation does not make every model an RH logger. Read the exact product label and sensor list before designing a monitoring program. For related guidance, see testo 160: How to Configure Temperature and Humidity Monitoring.
Common commissioning workflow
- Define the monitored space, the quantity to measure and the approved alert criteria.
- Select an appropriate H or T variant, including external probe and cable selection when applicable.
- Choose an installation location based on a site mapping or representative measurement plan.
- Add the device using the supported testo Smart App and online service, and verify the Wi-Fi path.
- Confirm channel names, clock, sampling/reporting rates and the Data Monitoring license required for the current system.
- Test alarms, dashboards and the recovery procedure before treating the setup as commissioned.
Readings from different sensor positions
The integrated H1 sensor represents conditions near the logger housing. An external H2 probe can measure inside a chamber while its logger remains outside. A T2 can compare two suitable temperature points at once, but it cannot turn those points into an RH reading. Preserve the physical sensor location in your records; identical room labels are insufficient. For external-probe setup, see the testo 162-H2 external-probe guide for probe placement, Wi-Fi and alarm configuration.
Example: planning a two-room installation
Hypothetical: Room A needs temperature and RH and Room B needs only temperature. A 162 H1 in Room A and a 162 T1 in Room B create three channels (two plus one). Sampling every 15 minutes produces 96 observations per channel per day, or 288 channel-observations daily. These are scheduling figures, not a compliance guarantee or statement of server storage. For two-point temperature monitoring, see the testo 162-T2 two-point guide for probe connection, channel setup and verification.
Check Wi-Fi and data licenses
Testo’s current US descriptions link this family to the testo 160 online monitoring ecosystem, Smart App and cloud or Smart Connect service; a Data Monitoring license is specified. In existing sites using older Saveris 2 services, confirm compatibility and migration arrangements with the manufacturer before changing accounts. The device’s local display can show data even if a remote dashboard is stale. For temperature-only online monitoring, see the testo 162-T1 Wi-Fi guide for service configuration, sampling and alarm verification.
Common mistakes to avoid
- Using a T1 or T2 article to claim RH measurement.
- Assuming a H2 can sense RH before a compatible external probe is attached.
- Applying a generic sample-rate or alarm threshold without checking the application.
- Reporting a data-sync failure as a confirmed process-temperature excursion.