Quick answer: The testo 162 T1 is a Wi-Fi online logger with a built-in NTC temperature sensor and local display. Install it at the designated air-monitoring point, configure the supported online service and sample/transfer intervals, then verify alarm records. It does not measure humidity; choose the H1 or H2 family for RH.
What is built into the T1
The T1 has product number 0572 1621. Testo specifies an integrated NTC sensor with measuring range -30 to +50 °C, 0.1 °C display resolution and a published temperature accuracy of ±0.5 °C plus one digit. The local display supports inspection at the instrument even when dashboard connectivity needs checking. Manufacturer documentation identifies IP65 protection and a 1-minute to 24-hour selectable measurement rate.
The unit is suited to ambient temperature at its mounted position. It has no RH measurement channel and is not interchangeable with the T2, whose readings come from two external probes. The testo 162-T2 two-point monitoring guide covers the external-probe configuration and monitoring differences.
Location before configuration
A temperature logger mounted on a cooler door frame can show a different history from one on a middle shelf. Map the monitoring objective first and record the chosen location. Avoid a nearby heating element, direct sunlight or a wall that biases the reading unless that location is deliberately selected to study those effects. For practical guidance on representative sensor positioning, see the ambient air temperature placement guide.
Set up a T1 monitor
- Verify the exact model label and serial number, and review calibration/commissioning documents.
- Install the logger in its bracket with appropriate batteries or supported supply.
- Use the supported testo Smart App setup to enroll the logger in the site Wi-Fi and monitoring service.
- Select the sampling and transfer intervals; verify the dashboard clock and that the internal temperature reading updates.
- Set the approved temperature limits and alarm recipients. Test an alarm by an authorized safe method.
- Export a test period and confirm location, instrument ID, timestamps, any missing-data gaps and alarm history.
Hypothetical sampling comparison
At a 5-minute interval, a continuously operating channel schedules 288 readings in a day. At 30 minutes it schedules 48. The denser schedule includes six times as many readings; it may reveal short excursions that sparse sampling misses. It also does not eliminate sensor-position errors or prove uninterrupted data delivery. For guidance on choosing intervals, see the data logger sampling interval guide.
Diagnose apparent drift or missing data
| Issue | Practical diagnostic |
|---|---|
| Temperature higher than another logger | Co-locate temporarily and compare accuracy/conditions |
| Local display current, cloud value old | Wi-Fi, monitoring account and upload timestamp |
| Missing RH readings | Normal: T1 has no RH sensor |
| Battery warning or unexpected interruption | Power condition, site maintenance log and data gap handling |
Interpreting data for audits
A logger value is not automatically the temperature of a product package. Documentation should identify whether it represents room air, a refrigerator location or another air environment. A Testo Data Monitoring license is specified for the current online service; verify software/contract compatibility before replacing older Saveris equipment.