Float, Level Sensors

This Product Selection Guide contains information to help select products in the Float, Level Sensors category on DigiKey.com

Products within the Float, Level Sensors category are used to measure or detect a fluid or material level within a container, commonly through the use of a buoyant element containing or connected to a switch of some type, but in other cases through the use of ultrasonic, optical, or other techniques. Outputs produced by these devices may be variable to allow a quantitative measurement of fluid/material level, or a simple binary indication of whether or not the level is in excess of some fixed value.


SelectionCharacteristics

Specifications to determine which float sensor is right for your application.

Type: What the float sensor is designed for, such as liquid or powder.

Output Type: Indicates the type of electrical signal the device provides, such as analog or switch.

Output Configuration: The type of switch or analog signal at the output of the device, such as SPDT switch or 4-20mA, etc.

Current: Typically this represents the maximum current to which a device will meet its given specifications. Exceeding this current may damage the device and/or other system components.

Minimum Liquid Specific Gravity: The minimum density of a monitored liquid required for proper sensor function, compared to water at 4°C.

Switch Actuation Level: For float-type sensors, characterizes the amount of float motion required to actuate the switch.

Mounting Type: Indicates how the device is attached.

Material - Housing and Prism: The type of material the housing and prism parts of the float sensor are made of.

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.

Voltage Rating: 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.


ProductExamples


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MFR PART # SQ4-A21-P
DIGI-KEY PART # 1110-4442-ND
MANUFACTURER Panasonic Industrial Automation Sales
DESCRIPTION Liquid Level Sensor PNP Output Bracket Mount
DATASHEET Click Here

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MFR PART # TSF44Y100DF
DIGI-KEY PART # 725-1151-ND
MANUFACTURER Sensata-Cynergy3
DESCRIPTION Liquid, Temperature Level Sensor Switch (Single Float) SPST-NC/NO Output Panel Mount, M16x2 Thread
DATASHEET Click Here

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MFR PART # LLC101101
DIGI-KEY PART # 1921-1004-ND
MANUFACTURER SST Sensing Ltd.
DESCRIPTION Liquid Level Sensor Digital Push-Pull Output Threaded
DATASHEET Click Here

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MFR PART # FPS-B
DIGI-KEY PART # 374-1354-ND
MANUFACTURER Standex-Meder Electronics
DESCRIPTION SENSOR LEVEL FLOAT W/BRACKET
DATASHEET Click Here

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MFR PART # LITTLE-EX-10M
DIGI-KEY PART # 725-1275-ND
MANUFACTURER Sensata-Cynergy3
DESCRIPTION Liquid Level Sensor Switch (Single Float) SPDT Output Cable Mount
DATASHEET Click Here

MediaLinks

Videos
Videos of Float (Liquid Level) Sensors

Articles
Selecting a Fluid Level Sensor
Liquid Level Sensing is Key Technology

Product Training Modules
Liquid Level Sensing Technology - Standex

TechForum
TechForum posts on Float (Liquid Level) Sensors

If you have any questions on the specifications for selecting a Float, Level Sensor, please reply using the button below. If you have questions on a specific float, level sensor please post those questions in the Sensors, Transducers category.