A sensor in every unit, and nothing goes quiet without you knowing
Wireless probes clipped inside fridges, freezers, cold rooms and trucks. They read every minute, store readings locally through network cuts and report battery and signal so a dead sensor never looks like a calm fridge.
- 1 min
- reading interval
- 30 days
- local memory per sensor
- ±0.3 °C
- accuracy in 2-8 °C
- 2-3 yrs
- typical battery life
Built for the inside of a cold room
Probes for every range
Air probes for fridges, glycol-buffered probes for vaccine stock, flat-cable probes for freezer doors and PT100 probes for -80 °C units.
Local storage
Each sensor keeps about 30 days of minute readings and back-fills the cloud record after a network or gateway outage.
Battery and signal health
Low battery, weak signal and missed check-ins raise their own alerts, separate from temperature alarms.
Door contacts
Optional magnetic contacts log every door opening so you can tell a long restock from a fault.
Humidity where it matters
Temperature and humidity sensors for ambient pharma godowns held at 15-25 °C and below 60% RH.
Works with existing loggers
Some loggers already on your shelves can be connected. Send the make and model and we will confirm.
How a reading travels
- 01
Sensor reads
Every minute, stored on the sensor first.
- 02
Gateway relays
Sub-GHz radio through cold-room walls to a gateway on battery backup.
- 03
Cloud records
Encrypted upload over Wi-Fi, Ethernet or 4G.
- 04
Gap back-fill
Missed readings sync from sensor memory when the link returns.
Sensor and gateway details
- Ranges
- 2-8 °C, 15-25 °C, -25 to -15 °C, -86 to -60 °C, custom
- Accuracy
- ±0.3 °C (2-8 °C), ±0.5 °C (freezer), ±1.0 °C (ultra-low)
- Radio
- Sub-GHz long range, works through insulated walls
- Gateway uplink
- Wi-Fi, Ethernet or 4G with battery backup
- Local buzzer
- Gateway sounds an alarm on site even when offline
- Calibration
- Every sensor ships with a calibration certificate
- Supply
- Buy outright or rent monthly
Common questions
How many sensors does one gateway handle?
A gateway typically handles up to 100 sensors within range. Large warehouses or multi-floor buildings use more than one gateway, all on the same account.
Can I move a sensor between units?
Yes. Reassign it in the app; history stays with the old unit and new readings go to the new one, so records remain accurate.
What if a sensor stops reporting?
A missed check-in raises a sensor alert to your chain, separate from a temperature alarm, so a dead probe is never mistaken for a stable fridge.
Works alongside
Monitor your first 5 sensors free.
60 days of Wyenfos on five sensors in your own fridges, freezers or trucks. Bring compatible probes or rent ours. Live readings, AI warnings, night alerts and audit logs from day one.
- No card for the trial
- Sensors to buy or rent
- Most sites live in a day