Controllers - Liquid, Level

This Product Selection Guide contains information to help select products in the Controllers - Liquid, Level category on

Industrial liquid level controllers are used to monitor constant level, high or low level, and leak detection types of sensing. Additional features may include adjustable sensitivity, built-in timers, LED indication, filter alerts, and auto shut off valves. Solid state or mechanical contacts are actuated upon detection with contact form variations of DPDT, DPST, SPDT, and SPST functionality.


Type: Indicates the style and configuration of the device.

Voltage - Supply: Typically represented by a range, this indicates the low and high voltage limits which one can expect standard operation. Voltages outside this range may damage the device and other system components.

Sensitivity: Indicates the specific resistance value or range of resistance values of liquids the device is designed to be used with.

Features: Special features or functions the device includes.

Distance - Control To Sensor (Max): The total length the conductive path can be between the device and the item taking the reading.

Output Type: Indicates the manner of the implementation of the output.

Contact Form: Describes the contact closures provided by a relay or relay-output device, in terms of the number of independent circuits that are actuated in parallel, the number of contact positions available for each, and their default states.

Contact Rating @ Voltage: Typically this represents the maximum current to which a device’s contacts will meet their given specifications at a given voltage. Exceeding this current may damage the device and/or other system components.

Mounting Type: Indicates how the device is attached.

Termination Style: Selection of termination style used to connect the device to a system, such as cable leads, quick connect, or screw terminals.

Operating Temperature: Recommended operating temperature, typically given in a range or as a maximum. Exceeding these temperatures may affect performance or damage the device and other system components.



DIGI-KEY PART # 1864-1622-ND
MANUFACTURER Carlo Gavazzi Inc.
DESCRIPTION Liquid Level Controller High/Low Level SPST-NO (1 Form A) x 2 24VAC/DC Socketable


MANUFACTURER Mueller Electric Co
DESCRIPTION Liquid Level Controller Leak Detection DPDT (2 Form C) 120VAC DIN Rail

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