TUNDRA – Cold Chain Temperature & Humidity Sensor

LoRaWAN® Device for Cold Chain Environment Monitoring



Battery Life

15 Year Battery Life

Ingress Protection




RF Power

Up to 20 dBm

LoRa Device Class

Class A

All Global ISM Bands

All Global ISM Bands

TEKTELIC’s TUNDRA Sensor is the ideal LoRaWAN solution for maintaining optimal and consistent temperatures within cold rooms and refrigerated areas. Applications include food and pharmaceutical storage, where safeguarding the integrity, quality, and safety of products is vital. The device can be implemented within cold storage such as fridges, coolers, cold rooms and even freezers with minimal impact on battery life or radio signal strength. The TEKTELIC TUNDRA Sensor is seamlessly integrated with TEKTELIC’s end-to-end IoT solution.


  • Ambient Tempature & Humidity Monitoring
  • Restaurant and Food Service Cold Chain
  • Medical, Pharmaceutical and Vaccine Storage
  • 15 Year Battery Life
  • 125 Days/3000 Entries of Stored Data
  • All Global ISM Bands
  • Small Form Factor for Diverse Deployments
  • Easily Integrated into LoRaWAN® Networks
  • Internal Antenna
Operational Temperature -40°C to +85°C
Protection Rating IP67
LoRa Device Class A
Antenna Internal
RF Power up to 20 dBm
RF Sensitivity up to -137dBm
Battery C-Cell
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Can I store data?

Yes, the TUNDRA stores ambient temperature, ambient relative humidity, and probe data (if using the TUNDRA-Probe) by default. If you do not need to store one or more of these data-types, storing can optionally be disabled.

How long is the data stored?

Up to 3000 entries each of ambient temperature, ambient relative humidity, and probe data can be stored before the TUNDRA begins overwriting the oldest data. With default reporting settings (1 report/hour), this is equivalent to 125 days of data.

What is the difference between ambient temperature, probe temperature, and MCU temperature?

• Ambient temperature is measured by a transducer on the circuit board inside the enclosure and is supported by both the Base and Probe variants.
• Probe temperature is measured through the probe voltage reading and converted by a formula. The probe can be used to access remote areas where the TUNDRA itself cannot go, such as inside of a very cold freezer.
• MCU temperature is the temperature of the MCU on the circuit board. This is used to monitor the health of the MCU and may differ from the ambient readings.

Are the temperature and humidity instant-read?

Since the ambient data is measured from inside the enclosure, it takes some time for the ambient air to flow through the humidity vents and equalize with the inside of the TUNDRA. The ambient temperature takes about 5 minutes to equalize and the relative humidity takes about 80 minutes.