WiFi Temperature & Humidity Data Logger System – Testo Saveris 2


Supervise the temperature and humidity in cold storage or refrigerated rooms with this advanced WiFi temperature & humidity data logger system.

Take advantage of the latest technology to receive alarm notifications of a breach in temperature or humidity on your smartphone or PC.

You can continuously check the temperatures and humidity with the connectable probes, reliably recorded the values and transmit the information directly to the cloud via a wireless LAN. You can then access these readings at any time, anywhere, using your internet-enabled smartphone, tablet or PC.



  • Refrigerated rooms
  • Work rooms or store rooms


  • Measurement of temperature and humidity with connectable probe
  • 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

  • Humidity / Temperature Probe with fixed cable length of 1.3 m
  • Humidity / Temperature Probe, plug-in without cable


Two year limited warranty

How it works



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.

Connection external

External humidity/ 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-H2 WiFi data logger
  • Connections for one external humidity probe
  • USB cable
  • Wall bracket
  • Batteries
  • Short instructions
  • Calibration certificate


  • You will require a wireless LAN-capable network in order to use this system
  • 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 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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