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Frequently Asked Questions
What are the three jobs here?
Deciding, observing and protecting.
Controllers hold setpoints and stage plant.
Sensors report what the equipment is being fed.
Leak detection localises an escape and isolates it.
Buying one while expecting another is the usual error.
They are specified together, not in sequence.
Why does sensor position matter more than sensor count?
Guidance is written in terms of intake conditions.
A reading in the middle of the hall describes the room.
A reading at the rack face describes the equipment.
Only the second one can be acted on.
Poorly placed sensors give confident wrong answers.
Agree positions before quantities.
What does a controller change on its own?
Nothing physical.
It stages, sequences and holds setpoints.
Plant does the moving.
Runtime sharing between units is a real saving.
So is avoiding units fighting each other.
Neither happens without one.
When should leak detection be specified?
At the same moment as the liquid.
It exists because water now sits near powered equipment.
Adding it after an incident is the common pattern.
Its value is speed of localisation.
Isolation without waiting for a person matters more.
Treat it as part of the liquid scheme.
Why is the protocol question asked first?
Integration outlives the hardware.
The site already has a management system.
Equipment it cannot read produces isolated data.
Open protocols reduce that exposure.
Gateways add cost and another failure point.
Confirm compatibility before comparing features.
What happens when this equipment fails?
It depends entirely on how it was specified.
Some plant reverts to local control and keeps running.
Some stops with the controller.
A hall cannot wait for a replacement part.
Ask what the failure mode is in writing.
Test it during commissioning, not later.
How much of this is needed on a small site?
Less than a hyperscale hall, but not none.
Inlet sensing is worthwhile at any size.
Controller value rises with the number of units.
One unit needs little sequencing.
Leak detection follows the liquid, not the size.
Scale the controller, not the safety.