Float, Level Sensors

Image Part Number Description / PDF Quantity Rfq
ILLSU-GI240-5-008

ILLSU-GI240-5-008

Sensata Technologies – Cynergy3

SENSOR PRES 0-240"WG 4-20MA 8M

0

RSF166A25B75

RSF166A25B75

Sensata Technologies – Cynergy3

DL PNT FLOATSWITCH 102MM TOTAL L

4

RSF66A50A100P

RSF66A50A100P

Sensata Technologies – Cynergy3

DL PNT FLOATSWITCH 134MM TOTAL L

0

ILSEU-GI480-5

ILSEU-GI480-5

Sensata Technologies – Cynergy3

SENSOR PRESSURE 0-480WG 4-20MA

0

RSF74H100RN

RSF74H100RN

Sensata Technologies – Cynergy3

FLOATSWITCH HORZ 1A NO/NC POLY

0

RSF47YFP

RSF47YFP

Sensata Technologies – Cynergy3

LEVEL SENSOR HORZ SPST 25VA PVDF

0

RSF57H100GC

RSF57H100GC

Sensata Technologies – Cynergy3

LEVEL SENSOR VERT SPNO 100VA PVD

0

LLF77H100GN

LLF77H100GN

Sensata Technologies – Cynergy3

FLOAT SWITCH 25VA PVDF 1M PTFE N

0

RSF48Y100RF

RSF48Y100RF

Sensata Technologies – Cynergy3

FLOATSWITCH HORZ .6A NO/NC PP

35

OLS710D3LSH

OLS710D3LSH

Sensata Technologies – Cynergy3

FLOAT SENS LIQ PUSH-PULL 2.5MA

8

RSF153YFP

RSF153YFP

Sensata Technologies – Cynergy3

FLOATSWITCH VERT 25VA SPNO

0

TSF78H100DN

TSF78H100DN

Sensata Technologies – Cynergy3

COMP EXT MNT TEMP SEN LVL SW

5

RSF58Y100RC

RSF58Y100RC

Sensata Technologies – Cynergy3

FLOATSWITCH VERT .6A NO/NC POLY

0

ILS-G5000-060

ILS-G5000-060

Sensata Technologies – Cynergy3

SENSOR PRESSURE 0-50MWG 4-20MA

0

RSF48HFP

RSF48HFP

Sensata Technologies – Cynergy3

FLOATSWITCH HORIZ 1A NO/NC PP

0

SH-7051

SH-7051

Sensata Technologies – Cynergy3

SQ FLGE MNT FLOATSWITCH

0

LLF69B198

LLF69B198

Sensata Technologies – Cynergy3

FLOATSWITCH VERT .6A NC/NO PPS

0

RSF166A25B175

RSF166A25B175

Sensata Technologies – Cynergy3

DL PNT FLOATSWITCH 202MM TOTAL L

5

RSF16Y100TG

RSF16Y100TG

Sensata Technologies – Cynergy3

SENSOR LEVEL VERTICAL POLYPROP

0

SSF22X100-M12X1

SSF22X100-M12X1

Sensata Technologies – Cynergy3

MIN FS SS M12X1

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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