Float, Level Sensors

Image Part Number Description / PDF Quantity Rfq
SSF212X100

SSF212X100

Sensata Technologies – Cynergy3

FLOATSWITCH HORZ 50VA NC/NO SS

18

SH-5052

SH-5052

Sensata Technologies – Cynergy3

1.5 FLGE MNT FLOATSWITCH

0

RSF56Y100TB

RSF56Y100TB

Sensata Technologies – Cynergy3

FLOATSWITCH VERT .6A NO/NC PPS

0

OLS500D3

OLS500D3

Sensata Technologies – Cynergy3

OPT LIQUID LVL SENSOR M10 MNT HI

131

LLC610D3SH

LLC610D3SH

SST Sensing

LIQUID LEVEL SENSOR

20

RSF74Y100RN

RSF74Y100RN

Sensata Technologies – Cynergy3

FLOATSWITCH HORZ .6A NO/NC POLY

0

SSV66A35B135SM16

SSV66A35B135SM16

Sensata Technologies – Cynergy3

SD MNT DUAL SW PNT FLTSW M17

0

RSF84H100R

RSF84H100R

Sensata Technologies – Cynergy3

FLOATSWITCH HORZ 1A NO/NC POLY

88

RSF56Y050TB

RSF56Y050TB

Sensata Technologies – Cynergy3

FLOATSWITCH PPS N/O 25VA 50CM

8

TSF46H050TG

TSF46H050TG

Sensata Technologies – Cynergy3

THERMISTOR FLOAT SWITCH PPS 1A

0

RSF54H100R1/8

RSF54H100R1/8

Sensata Technologies – Cynergy3

FLOATSWITCH VERT 1A NO/NC POLY

0

SSV66A35B210SM16

SSV66A35B210SM16

Sensata Technologies – Cynergy3

SD MNT DUAL SW PNT FLTSW M20

0

TSF76H050TV

TSF76H050TV

Sensata Technologies – Cynergy3

THERMISTOR FLOAT SWITCH PPS 1A

0

SSV66A84E34NP

SSV66A84E34NP

Sensata Technologies – Cynergy3

VERTICAL FLTSW SS 3/4NPT MNT

0

LL01-1AB01

LL01-1AB01

TE Connectivity Measurement Specialties

SENSOR

0

PLS-031A-3PAI

PLS-031A-3PAI

PIC GmbH

MINIATURE LEVEL SENSOR

142

RSF108H100JN

RSF108H100JN

Sensata Technologies – Cynergy3

FLOATSWITCH VERT 25VA PP

0

LLF44H100RF

LLF44H100RF

Sensata Technologies – Cynergy3

FLOAT SWITCH 100VA PP 1M PVC 16/

0

59630-1-T-03-A

59630-1-T-03-A

Wickmann / Littelfuse

REED SENSOR W/INTEGRAL FLOAT

353

CD34CNFLFPCT5

CD34CNFLFPCT5

Carlo Gavazzi

SENSOR LEVEL SWITCH PNP

0

Float, Level Sensors

1. Overview

Float level sensors are electromechanical devices that measure liquid levels using buoyancy principles. They consist of a floating element mechanically linked to a sensing component, providing continuous or point-level detection. These sensors play a critical role in industrial automation, ensuring process efficiency, safety, and resource optimization across sectors like water treatment, energy, and manufacturing.

2. Main Types and Functional Classification

TypeFunctional CharacteristicsApplication Examples
Magnetic Float SwitchesHermetically sealed contacts activated by float movementWater tanks, fuel storage
Mechanical Lever ArmPhysical linkage translating float motion to potentiometerIndustrial boilers, hydraulic systems
Guided Tube FloatFloat moves along a vertical tube, triggering reed switchesChemical processing, corrosive environments
Optical Float SensorsCombines float mechanism with infrared detectionMedical equipment, cleanrooms

3. Structure and Components

A typical float level sensor comprises: - Float Element: Hollow cylinder made of stainless steel, plastic, or titanium - Guide Mechanism: Rigid rod or cable for vertical movement guidance - Sensing Assembly: Reed switches, potentiometers, or Hall-effect sensors - Enclosure: IP65-rated housing with process connections (NPT, flanges) - Electrical Interface: Terminal block or industrial connectors (M12, etc.) The design ensures reliable operation in media with specific gravity 0.5 and temperatures up to 200 C.

4. Key Technical Specifications

ParameterDescriptionImportance
Measurement Range0.1 10 metersDetermines application suitability
Accuracy 1 3% FSProcess control reliability
Output Signal4 20 mA, 0 10V, SPSTSystem integration capability
Environmental Temp.-40 C to +85 COperational stability
Process Connection1/2" 4" NPT, DINInstallation compatibility
Material CompatibilityPVDF, SS316, EPDMChemical resistance

5. Application Fields

  • Water/Wastewater Treatment: Reservoir level monitoring
  • Oil & Gas: Crude oil storage tank level detection
  • Pharmaceuticals: Reactor vessel fill control
  • Power Generation: Cooling tower water level management
  • Food & Beverage: Syrup level detection in processing tanks

6. Leading Manufacturers and Products

ManufacturerKey ProductFeatures
SiemensFloat Switch Series 8MEATEX-certified, 0.1% repeatability
HoneywellLM Series Level Switches316SS construction, SIL2 rated
TE ConnectivityMini-Level SwitchCompact 6mm diameter design
Endress+HauserProsonic M Float SwitchDual-limit detection with IO-Link

7. Selection Recommendations

Key considerations include: - Media properties (corrosiveness, viscosity, density) - Required measurement range and resolution - Electrical requirements (analog/digital output) - Environmental conditions (vibration, ambient temperature) - Hazardous area classification (ATEX, IECEx) - Maintenance accessibility and calibration frequency

8. Industry Trends

Emerging developments include: - Integration with wireless communication protocols (WirelessHART) - Multiparameter sensors combining level, temperature, and pressure - Self-powered IoT-enabled devices using energy harvesting - Advanced materials for extreme pH environments - Smart diagnostics with predictive maintenance capabilities

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