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