# Alert When a Silo Is Critically Low (https://logable.app/use-cases/silo-critically-low)

Get an alert when a silo drops to five percent of its capacity, the point where production stops without an emergency delivery.

## Equipment
One silo, close to empty, with the load cells still reporting its weight every minute.
- **Silo** weight

## The reading
- **Metric:** weight (t)
- **Source:** load cells under the silo legs
- **Cadence:** every minute

## The problem
Raw Meal Silo drops to 18 t against a 400 t capacity at 03:00. The routine reorder point passed a day ago and nobody acted on it. The mill has a few hours of feed left.

## The alert
**Critically low on stock** (critical)
critically low on stock
Fires at 5% of the capacity you set for this silo, deep enough into empty that only an emergency delivery avoids a production stop. The recovery point sits at 15%, comfortably above where a single spike would flip it back off.
Add it from the silo's Triggers tab alongside the routine low stock preset. The two do different jobs, and having both is the point.

## The response
- **Sent by:** push, email and the in-app inbox
- **Who is told:** the rule's recipients, then the escalation ladder
- **What happens:** The operator arranges an emergency delivery before the line stops. The alert carries the silo and the weight, so the call is made straight away.
- **Stops when:** somebody acknowledges

## On your dashboard
A Logable dashboard showing stock on hand and space left for a raw meal silo and a clinker silo

## Frequently asked questions

### How do I get an alert when a silo is critically low?
Open the silo's Triggers tab, select Browse presets, and add Critically low on stock. Add it alongside the routine low stock preset rather than instead of it: one books a delivery, the other stops a production halt.

### What level does the critically low silo alert fire at?
Five percent of the capacity you set for that silo. It clears at 15 percent, which is comfortably above the point where one odd reading would flip it back off.

### Who is woken when a silo is critically low, and what stops the reminders?
The rule's recipients, by push, email and the in-app inbox. Severity is your declaration, and this preset ships as critical because the consequence is a stopped line. Acknowledging stops the reminders.

## Related
- [Silo monitoring](https://logable.app/solutions/silo-monitoring)
- [how to monitor a silo remotely](https://logable.app/docs/guides/equipment/monitor-a-silo-remotely)

## Add the alert that stops a production halt
Set the silo's capacity once, and add both silo stock presets from the Triggers tab.