Quick answer: The testo 162 T2 records temperature from two compatible external NTC probes, with a local display and supported Wi-Fi/cloud monitoring. Connect and label the probes, place them at the two required locations, configure two independent channels and verify the reports and alarms. It has no relative-humidity sensor.
How the T2 differs from the T1 and H series
Testo identifies the T2 as product 0572 1622, with two connections for external NTC temperature probes. The T1 has one integrated temperature sensor instead; the H1 and H2 address temperature plus RH. The T2’s external probes allow the sensor points to be inside a cabinet or separated physically from the display and Wi-Fi body.
Testo lists NTC accessories such as penetration probes with flat ribbon cables, long-cable probes and surface probes. Choose a sensor based on the medium and mounting method; a surface probe on a pipe is not equivalent to a liquid-core reading. For general guidance on choosing compatible sensors, see Temperature Probes Explained.
Place and identify two probes
- Define Point A and Point B, including what each temperature should represent.
- Select compatible NTC probes, checking measuring range, protective construction, immersion depth and cable route.
- Connect both probes to the correct T2 inputs and label channel names to match the physical positions.
- Mount the logger securely and enroll it in the supported Wi-Fi monitoring service using the current commissioning workflow.
- Set logging intervals and separate alarm rules where the process requires different limits.
- Compare recorded times, probe identity and plausible readings, then carry out a controlled alarm/reporting test.
Worked example: refrigerator air and product simulator
Hypothetical: Channel A in refrigerator air reads 3.2 °C, while Channel B in a validated product simulator reads 5.0 °C. The temperature difference is 1.8 °C. The simulator may respond more slowly to door openings; neither reading should be relabeled as the other measurement point. Product release limits require the applicable approved protocol and sensor arrangement.
Measurement positions and cable issues
| Reading pattern | Potential explanation | Next check |
|---|---|---|
| Both channels shift simultaneously | Real chamber change or common environmental effect | Confirm room events and logger timestamps |
| Only Channel B jumps | Probe contact, route or local thermal event | Check B mounting and connector |
| One channel missing | Probe absent, damaged or disconnected | Verify input, sensor type and cable |
| Large stable difference | Different media/locations or sensor offsets | Co-locate and compare against documented references |
Data monitoring service and alarms
Current Testo US product descriptions specify the online monitoring ecosystem, wireless LAN, app setup and required Data Monitoring license. Check service compatibility with older Saveris 2 accounts before commissioning. A live reading on the local display does not mean that a remote alert has been delivered; prove both separately. For a comparable logger with a built-in sensor, see the testo 162-T1 setup guide.
Limits: no humidity and no automatic compliance
The two NTC inputs measure temperature, not humidity, and do not turn an air measurement into a direct product-core reading. Preserve sensor serial details, positioning records, alarm tests and the applicable calibration program. Select a testo 162 H model if temperature/RH monitoring is the real objective. If the monitoring requirement includes humidity with an external probe, see the testo 162-H2 configuration guide.