Float, Level Sensors

Image Part Number Description / PDF Quantity Rfq
LLF73H100RN

LLF73H100RN

Sensata Technologies – Cynergy3

FLOAT SWITCH NYLON 1M PVC

0

RSF76HNP

RSF76HNP

Sensata Technologies – Cynergy3

FLOATSWITCH HORZ 1A NO/NC PPS

0

681.5105.115

681.5105.115

Altech Corporation

FLOAT SWITCH MAA-713 KSS 0249

0

VNY1

VNY1

Carlo Gavazzi

LVL SNSR COND 1 PROBE NYLON

0

RSF16YFP

RSF16YFP

Sensata Technologies – Cynergy3

SENSOR LEVEL VERTICAL POLYPROP

0

VP03EPM

VP03EPM

Carlo Gavazzi

SEN LVL OPTICAL MOD PNP NC

0

LLC600D3LSH

LLC600D3LSH

SST Sensing

LIQUID LEVEL SENSOR

14

SSF50X100X

SSF50X100X

Sensata Technologies – Cynergy3

FLOAT SENS LIQ SPST-NC/NO .5A

0

RSF88HP

RSF88HP

Sensata Technologies – Cynergy3

FLOATSWITCH HORZ 1A NO/NC POLY

0

VP03E

VP03E

Carlo Gavazzi

LVL SNSR OPTICAL NPN NC

0

VPA1MNA

VPA1MNA

Carlo Gavazzi

SEN LVL OPTICAL POLYS NPN

0

VPB2MNA

VPB2MNA

Carlo Gavazzi

SEN LVL OPTICAL GLASS NPN

0

59630-4-T-02-C

59630-4-T-02-C

Wickmann / Littelfuse

REED SENSOR W/INTEGRAL FLOAT

0

VNY4

VNY4

Carlo Gavazzi

LVL SNSR COND 4 PROBE NYLON

0

VTI1

VTI1

Carlo Gavazzi

LVL SNSR COND 1 PROBE PTFE

0

VTI3

VTI3

Carlo Gavazzi

SEN LVL COND 3 PROBE PTFE

0

LLF76YNP

LLF76YNP

Sensata Technologies – Cynergy3

FLOAT SWITCH 25VA PPS NITRILE

0

VPA1MPA-1

VPA1MPA-1

Carlo Gavazzi

SEN LVL OPTICAL POLYS PNP

0

VP02EPM

VP02EPM

Carlo Gavazzi

SEN LVL OPTICAL MOD PNP NO

0

20017616-06

20017616-06

TE Connectivity Measurement Specialties

VCS-06 LIQUID LEVEL SENSOR

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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