Public Devices

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Clean baseline on campus. We hold the roadside numbers up against this one.

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

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

LPG in a hotel kitchen. Reads zero nearly always. That suits me fine.

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

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

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

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

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.

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

Borehole feeding a 24,000 litre tank. Motor current is what tells me when it is starting to pull air.

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.

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

30,000 litre diesel tank. Days of stock is the number I actually look at. Deliveries land here too, so I can see whether what was invoiced matches what arrived.

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

One classroom. Watch CO2 climb through a lesson and nobody argues about opening a window again.

Broiler house. If ventilation fails you lose the flock, not a day of growth.

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

Spindle load and utilisation. Mainly useful when quoting.

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

Rooftop tanks for the block. When demand stops matching how many people are in, it is usually a leak.

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.

Stored maize. Warm damp pockets are where it starts, and you cannot see them from outside the silo.