What a monitoring system does
A basic system has wireless temperature sensors in each cabinet, a gateway that sends readings over Wi-Fi or a mobile network, and a cloud dashboard or app. When a reading goes outside a set range for longer than a set time, it sends an alert by app notification, SMS or call. Over time it builds a temperature history for each unit.
More advanced systems add door sensors, power or current sensors on compressors, and humidity sensors, which together explain why a temperature changed.
What to monitor
| Measurement | What it reveals |
|---|---|
| Cabinet air temperature | Basic compliance and early warning of failure |
| Product-simulant probe | Temperature closer to the food or medicine, less affected by door openings |
| Door open time | Doors left ajar, staff habits, gasket problems |
| Compressor run time or current | Dirty condensers, refrigerant leaks, failing components |
| Room temperature | Whether high ambient is driving energy use |
| Power supply status | Outages, and how long cabinets hold during them |
Preventing stock losses
The quickest payback usually comes from avoiding a single large loss: a freezer that fails on a Saturday night, a vaccine fridge that warms during a long power cut, or a walk-in left open after closing. An alert at the first sign of trouble gives staff time to move stock or call a technician.
Alarm settings matter. Use delays so a normal door opening or defrost does not trigger an alert, but not so long that a genuine fault is missed. Set an escalation chain so that if the first person does not respond, the alert goes to the next.
Finding energy waste in the data
- Rising compressor run time over weeks often means a dusty condenser, a slow leak or a failing fan.
- Long run times at night, when doors are closed, point to gasket or insulation problems.
- Set points far colder than needed show up as cabinets running consistently below target.
- Frequent door alarms in one cabinet suggest a layout or workflow problem worth fixing.
- Comparing similar cabinets side by side shows which one is the energy outlier.
Records for food safety and audits
Food safety management systems and pharmacy procedures usually require regular temperature records. Automatic logging replaces handwritten logs that are easily missed or filled in after the fact, and gives a continuous record that inspectors and auditors can review. Follow FSSAI requirements, your licensing conditions and any programme guidelines for how records must be kept and for how long.
Setting up for Indian conditions
- Choose gateways with battery backup and mobile-network fallback, so alerts still go out during power cuts and Wi-Fi outages.
- Check sensor batteries and signal strength through stainless-steel cabinet walls before committing.
- Place probes away from the evaporator outlet and door, where readings swing most.
- Make sure alerts reach someone who can act at night and on holidays.
- Calibrate or check sensors against a reference thermometer periodically.
Start small and build
You do not need to monitor everything on day one. Start with the units where a failure would cost most, such as freezers of high-value stock or medicine fridges. Add compressor current monitoring to the largest energy users. Review the data monthly and act on what it shows; a monitoring system that nobody looks at saves nothing.
Frequently asked questions
- Will a monitoring system reduce my electricity bill by itself?
- No. It shows where energy is being wasted and when equipment is degrading. Savings come from acting on what it reveals, such as cleaning condensers, fixing gaskets and correcting set points.
- Where should the temperature probe go?
- Usually in the centre of the cabinet, away from the air outlet and the door. Many users place it in a small bottle of glycol or a similar simulant so it tracks product temperature rather than short swings in air temperature.
- What happens to alerts during a power cut?
- That depends on the gateway. Choose one with battery backup and a mobile-network connection so it can report the outage and the temperature rise while the power is off.
