IoT sensors in every vaccine fridge across the network stream temperatures to a monitoring flow that alerts on-call staff by WhatsApp and phone the moment readings drift — and auto-generates the daily compliance logs regulators demand. The typical outcome: zero spoiled batches.
Typical results
Under 1 min
Time to first alert
14
Fridges monitored 24/7
5 hrs/wk
Manual logging eliminated
Figures reflect typical results for this kind of automation.
The challenge
Nurses checked fridge thermometers twice a day and wrote temperatures on a paper log. A door left ajar on Friday evening could go unnoticed until Monday, and the network had lost four vaccine batches in a year — thousands of shekels each, plus cancelled vaccination days and painful reporting to the health authorities.
Before and after
Time to detect temperature drift
−99%Vaccine batches lost per year
−100%Staff time on temperature logs
−83%The automation
We installed IoT temperature sensors in all fourteen fridges across the network's branches and streamed their readings into a Make monitoring flow. The flow checks every reading against safe ranges and rate-of-change rules; the moment a fridge drifts, on-call staff get a WhatsApp alert, followed by an automated phone call that repeats until someone acknowledges. Every incident is logged, and the daily temperature logs regulators require are generated and filed automatically.
How it works
- 01
Sensors stream
IoT sensors in all fourteen fridges send temperature readings every minute.
- 02
Drift detected
The flow checks each reading against safe ranges and rate-of-change rules.
- 03
Humans alerted
On-call staff get a WhatsApp alert, then an automated phone call that repeats until acknowledged.
- 04
Incident logged
Every event is recorded with response times for the audit trail.
- 05
Compliance filed
The daily temperature logs regulators require are generated and filed automatically.
Starts from
- IoT temperature sensors
- Fridges in every branch
Delivers
- WhatsApp alerts
- On-call phone calls
- Daily compliance logs
The impact
Spoiled vaccine batches typically drop to zero, compared with around four lost a year on manual checks. Temperature drift triggers an alert in under a minute instead of waiting for the next manual check, nurses stop keeping paper logs, and regulatory inspections are handled by exporting a report.
Questions about this automation
How quickly does staff hear about a temperature problem?
Sensors report every minute, and each reading is checked against the safe range and a rate-of-change rule that catches a door left open before the limit is reached. A drift triggers a WhatsApp alert to on-call staff within about a minute, followed by an automated phone call that repeats until someone acknowledges.
Who gets the alert outside clinic hours?
The flow follows an on-call rota, so nights, weekends and holidays route to whoever is responsible at that time. If the first person does not acknowledge, the alert moves to the next contact on the list. Every alert, acknowledgment and response time is logged for the audit trail.
Can it produce the temperature logs inspectors ask for?
Yes. The daily temperature log for each fridge is generated from the sensor readings and filed automatically, along with any incidents and how they were resolved. A report covering any date range can be exported in a few clicks, so staff no longer keep paper logs next to the fridge.