No gateway needed
The built-in SIM carries readings to the cloud on its own, so a single fridge or a remote site can be monitored from day one.
Fixed sensor · Built-in SIM
A fixed temperature sensor with its own SIM, so it reports without a gateway.
At a glance
Standard Device A0 watches fridges, freezers and cool rooms around the clock. Its built-in SIM sends readings straight to Callisto, which makes it a good fit for sites without a gateway.
Fixed monitoring
Always-on sensors for cold and hot storage.
The built-in SIM carries readings to the cloud on its own, so a single fridge or a remote site can be monitored from day one.
A magnetic mount puts it where it is needed, with an optional probe for inside the cold space.
Readings feed Callisto’s amber and red alerts, which escalate until someone acts.
Works well with
Book a demo
See the Standard Device A0 working with Callisto, and the records it leaves behind.