Wireless Temperature Sensor with Backup Memory

Log temperature and humidity even when not connected to the cloud.

$141.90 inc GST

A constant record of temperature, even if the power goes out

The wireless temperature sensor features in-built backup memory. If the sensor loses contact with the base station, it keeps recording temperatures. When the connection to the base station is re-established, the sensor will automatically upload its stored data.

This makes this model ideal for sensitive applications where results must be recorded with no gaps in the data e.g. a vaccine fridge.

Internal Backup Memory

Enough for nearly a month of recordings at 5 minute intervals

Alarms and Notifications

Get alarms and notifications when the temperature falls out of your desired range*


No messy or expensive cabling

iOS and Android app

iOS and Android app available for easy setup and notifications

Replaceable Battery

Battery will last up to 12 months months.

-30°C to 80°C

Wide temperature range suitable for fridges, freezers and room temperature.

* NOTE: when the logger is out of range of the base station, you won’t receive any alarm notifications to your phone. The unit will log (record) the temperature and upload this information when it re-establishes communication with the server.

Common questions

Yes. This system requires a base station in order to save temperature data to the internet. However, one base station can handle connections from dozens of sensors at once, provided they are all in range.

No. The sensor transmits data on a frequency of 433Mhz. This is completely different to the wi-fi connection.

It’s actually the same frequency used by things like garage door openers or remote control toys. This frequency allows better penetration through fridges, coolrooms and walls.

When the power to the base station goes out, the internet server will recognise that it has lost connection to the base station and signal an alert.

Depending on how you have configured your account, this can do a number of things including sending an email and sending a notification to your phone.

If your sensor has a backup memory, it will continue to log temperatures and save that data to its internal memory. It can save over 8,000 readings – about 28 days of readings five minutes apart.

When the connection from the base station to the internet is re-established, the server will trigger another set of actions. The data saved in the sensor’s memory will be uploaded to the internet so there should be no gaps in the record.

The battery is a fairly standard 3V coin-cell battery (Model CR2032). You can buy them at supermarkets, pharmacies, hardware stores, etc for a couple of dollars.

How long the battery lasts is dependent mainly on two factors: the sampling rate and the connection strength.

The sampling rate is set to a maximum of 5 minutes, and this is the recommended interval for most applications. If you configure the sensor to log more frequently than that, it will use power faster.

Sensors try to use as little power as possible to connect to the base station. If they are a long way from the base station or there are a lot of obstructions to the signal, then they are forced to use more power to make a connection, draining the battery faster.

In the worst case, battery life can be quite short – as little as a few months. Most of our customers report battery life of between 10 and 14 months.

Replacing the battery is quite a quick process, but it can be a bit fiddly.

Here is a video that explains the process…

Watch on YouTube


  • Memory: 8192 recordings
  • Battery Type: CR2032 x1 (replaceable)
  • Battery Life: 2 to 85 months depending on usage and response delay settings
  • Range: up to 100m line of sight
  • Frequency: 433MHz
  • Operation range: -40°C (-40°F) to 85°C (185°F)
  • Accuracy: +/-0.4°C max
  • Resolution: 0.02°C
  • Relative Humidity: +/-2% RH error, 10-bit resolution (0.12% step)
  • Height: 44mm
  • Width: 41mm
  • Thickness: 8.5mm
  • Weight: 15g

NOTE: This product requires a Wireless Ethernet Base to be able to operate.

FCCID: ZGW05. FCC Compliance Statement: This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Caution: Any changes or modification cautions to this device not explicitly approved by manufacturer could void your authority to operate this equipment.