Case study
A cold-storage alert at two in the morning
Temperature & humidityFood & beverage processingControlled environment agriculture (greenhouses)
A refrigeration fault was detected overnight, before product temperature was affected.
An overnight refrigeration fault pushed a cold-storage chamber out of range before product temperature was affected. We use chamber readings and escalating alerts to bring the change to the team’s attention while the facility is empty.
What the data showed
Explore the chart to inspect the readings.
| Interval | Chamber 2 (°C) |
|---|---|
| 00:00 | −18.1 |
| 00:30 | −18.2 |
| 01:00 | −18.2 |
| 01:30 | −11.4 |
| 02:00 | −10.8 |
| 02:30 | −10.4 |
| 03:00 | −9.9 |
| 03:30 | −9.6 |
| 04:00 | −9.0 |
| 04:30 | −8.6 |
| 05:00 | −18.1 |
| 05:30 | −18.2 |
| 06:00 | −18.4 |
| 06:30 | −18.2 |
| 07:00 | −18.4 |
| 07:30 | −18.3 |
| 08:00 | −18.3 |
| 08:30 | −18.4 |
| 09:00 | −18.2 |
| 09:30 | −18.3 |
| 10:00 | −18.3 |
| 10:30 | −18.1 |
| 11:00 | −18.4 |
| 11:30 | −18.2 |
| 12:00 | −18.2 |
| 12:30 | −18.2 |
| 13:00 | −18.1 |
| 13:30 | −18.3 |
| 14:00 | −18.2 |
| 14:30 | −18.3 |
| 15:00 | −18.1 |
| 15:30 | −18.3 |
| 16:00 | −18.2 |
| 16:30 | −18.1 |
| 17:00 | −18.0 |
| 17:30 | −18.4 |
| 18:00 | −18.0 |
| 18:30 | −18.3 |
| 19:00 | −18.2 |
| 19:30 | −18.4 |
| 20:00 | −18.4 |
| 20:30 | −18.2 |
| 21:00 | −18.0 |
| 21:30 | −18.0 |
| 22:00 | −18.2 |
| 22:30 | −18.0 |
| 23:00 | −18.0 |
| 23:30 | −18.0 |
| Before | A morning discovery and a product decision |
|---|---|
| After | A 2 a.m. text and a chamber back in range by 3 |
Background
A cold-storage operation needs to keep its chambers within their operating temperature range overnight. The room warms gradually when refrigeration develops a fault. That leaves a period when the chamber reading is changing but the stored product has yet to be affected. Our monitoring focuses on that period.
The problem
A temperature check in the morning comes after the chamber has spent the night unattended. If a fault begins after everyone leaves, the team may first learn about it when they return. By then, they have to assess both the refrigeration problem and what happened to the product while temperatures were changing.
How we found it
We use temperature probes in each chamber, alongside door-state and humidity monitoring. The temperature trace shows when the chamber moves outside its range. SMS alerts with escalation bring that reading to the team, rather than leaving it on a screen waiting for someone to open the dashboard.
What changed
The overnight refrigeration fault triggers a text while nobody is on site. The chamber is brought back into range before product temperature is affected. The team has the temperature history as well as the alert, so the response begins with a record of the change and continues with a view of the chamber returning to range.
The lesson
Set a clear escalation route so an overnight alert reaches someone who can respond. Use the temperature history to check that the chamber returns to range and stays there for the rest of the night.
What changed
Before
A morning discovery and a product decision
After
A 2 a.m. text and a chamber back in range by 3
2 a.m.alert
Sent by SMS the moment the chamber drifted out of range, with nobody on site.
Where to go next
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