Public Devices

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

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

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

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

Spindle load and utilisation. Mainly useful when quoting.

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

Soil moisture at three depths on one block. We irrigate on the readings now rather than the calendar.

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

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

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

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

One multi-deck on the chilled aisle. I am trying to work out whether the shrinkage is the case or the staff.

Carbon monoxide in the underground car park. The fans used to run on a timer whether anyone needed them or not.

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.

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

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.

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

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

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

Air handler on the third floor. Half of this is settling arguments about whether it is actually running.

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.

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.

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