WiFi Temperature Data Logger System – Testo Saveris 2


Check that the temperature in refrigerated rooms is always spot on with this reliable WiFi Data Logger. Installation is easy and the system will send an alarm on your smartphone / PC when temperatures are too high or too low, and when door contact changes.

It is important to monitor the temperatures and door contacts in refrigerated or cold storage rooms, for quality control purposes. These are measured through connectable probes, reliably recorded over a time period, and sent to the cloud via your WiFi. You can access these readings at any time, anywhere, using your internet-enabled smartphone, tablet or PC.



  • Monitoring the temperature of refrigerated rooms
  • Monitoring the temperature of storage rooms
  • Monitoring door contact values of storage / work / refrigerated rooms


  • Measurement of door contact values
  • Measurement of temperature at a range of -30 to +50°C via connectable probes
  • A variety of connectable probes is available for separate purchase
  • Easy installation via the internet or with the Testo Savaris 2 App
  • Long battery life
  • Clear digital display
  • Measurement data always available for reference on smartphone / tablet / PC
  • Data transfer by wireless LAN
  • Online data can be stored in the cloud (choose free basic cloud or more extensive advanced functionality)
  • Alarms can be set up for a push notification on the instrument, email or sms (optional) to notify you of any violation, even when you are not on site
  • ISO certified certificate

Probes available

  • Temperature probe with velcro
  • Stump probe
  • Stationery aluminium probe
  • Accurate immersion / penetration probe
  • Pipe wrap probe with velcro tape


Two year limited warranty

How it works


Temperature – NTC Measuring range -50 to +150°C
Accuracy ± 0.3°C
Resolution 0.1°C


95 x 75 x 30.5 mm

Operating temperature

-30 to +50°C

Protection class


Measuring rate

Basic: 15 min … 24 h / Advanced: 1 min … 24 h (flexible)

Door contact


Communication rate

Basic: 15 min … 24 h / Advanced: 1 min … 24 h (flexible)

WLAN Connectivity

Signal transmission: wireless; frequency band: 2.4 GHz; supported wireless LAN standards: IEEE 802.11 b/g/n and IEEE 802.1X; Possible encryption methods: without encryption, WEP, WPA, WPA2, WPA2 Enterprise – The data loggers communicate via the standard protocol MQTT and are SNTP time synchronization-capable.


DIN EN 12830

Connection external

External temperature probes

Power supply

4 x AA AlMn batteries; mains unit optional; for temperatures below -10°C (please use Energizer batteries 0515 0572)


10,000 measurement values / channel

Battery life

12 months (typical value, depending on the wireless LAN infrastructure) at +25°C, 15-minute measuring cycle and standard communication cycle at -30°C, 15-minute measuring cycle and standard communication cycle with Energizer batteries 0515 0572

Storage temperature

-40 to +70°C (without batteries)


240 g


  • Testo Saveris 2-T2 WiFi data logger
  • Two connections for external NTC temperature probes or door contacts
  • USB cable
  • Wall bracket with lock
  • Batteries
  • Short instructions
  • Calibration certificate


  • Choose from free basic cloud package or more extensive advanced functionality (in this case, a 12 month licence will need to be purchased)
  • Does not include any of the connectable probes. You will need to order at least one, as a separate purchase
  • See Downloads tab for details of these options
  • A mains unit is available for use with the wireless LAN data logger, as an optional extra purchase




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