Public Devices

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No grid out here at all. Solar and the battery bank carry most of it and the set fills the gap. I mostly watch the fuel. We lost about 200 litres over two months before this went in.

Frost watch through the season. One night is all it takes.

Main cold store, product for export. Since we started logging door time the arguments stopped.

Thirty seven degrees, tight tolerance. A short excursion overnight invalidates a week of work and you would never know.

One residential zone of a distribution network, metered on its single inlet, with the volume billed inside the zone alongside it. The gap between the two is non-revenue water, and splitting a network into zones is what turns one town-wide loss figure into somewhere to send a crew.

Feed pump on the boiler. It threw a bearing in March and took the boiler down with it. Now it is watched.

Long cycle test rig. Left it running over a weekend once and found out on Monday that it had stopped on the Friday night.

Cut flowers under glass. Temperature, humidity, CO2 and vent position. One bad afternoon costs a shipment.

District meter. Night flow is the number that matters. Whatever is still moving at three in the morning is leaking.

22 kW drive on line two. The vibration trend is the entire reason it is monitored.

18 kWp teaching array. Students can see where the losses go instead of taking my word for it.

Small server room on a precision unit. Honestly this is here so I know how much headroom is left in the hottest week of the year.

96 kWp across the warehouse roof. I check yield against irradiance most mornings. When it drifts below where it should be, the panels want washing.

Incoming supply for the whole building. Tenants ask what happened. Now I can tell them.

Dewatering the pit. If this stops, work stops, so it gets watched properly rather than checked on.

A zone on ageing pipework, metered on its inlet against the volume billed within it. Physical leakage runs at the same rate all night, so where the loss is water in the ground rather than water unbilled, the minimum night flow says so plainly.

Frozen container, minus eighteen the whole way. The log is the only thing that survives the journey.

Cycle counts, utilisation, and every short stop. Quoted capacity and actual capacity have never been the same number.

Shared tanks. Who used what, and whether that pump is short cycling again.

Walk-in behind the kitchen. Door openings turn out to be most of the load, which surprised me.

Monitoring at the board. We had equipment failing and nobody could say why. Turned out to be sags, not the equipment.

Sat beside a busy road. Mornings are worse than I expected. Still air holds everything in until the sun gets up.

A commercial zone where the pipework is sound and the loss is still large. Water that reaches a customer and is never billed follows the demand curve instead of running all night, which is why two zones can lose the same share and need entirely different work.