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A device to prove the physical state of a required condition and to furnish that proof to the primary safety control circuit.

Related Terms

RESTRICTOR

A device for producing a deliberate pressure drop or resistance in a line by reducing the cross-sectional flow area.

ADJUSTABLE DIFFERENTIAL

A means of changing the difference between the control cut-in and cut-out points.

SAFETY CONTROL

Device to stop unit, equipment or system if unsafe pressure and/or temperatures and/or dangerous conditions are reached.

AIR COOLER

A factory-encased assembly of elements whereby the temperature of air passing through the device is reduced.

ACTION

Refers to the action of a controller. It defines what is done to regulate the final control element to effect control.

FILTER ELEMENT

The porous device that performs the actual process of filtration. Also known as Cartridge

SHED MODE

A method of demand control that reduces kW demand through shedding and restoring loads.

COMPRESSOR

A device which converts mechanical force and motion into pneumatic flow power.

ANAEROBIC

A condition in which 'free' or dissolved oxygen is not present in the water.

REFRIGERATOR

A device to transfer heat from a low temperature to a high temperature medium.
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