Float, Level Sensors

Image	Part Number	Description / PDF	Quantity	Rfq
	LLF76H100RN Sensata Technologies – Cynergy3	FLOAT SWITCH 100VA PPS 1M PVC NI	0
	LLF77HNP Sensata Technologies – Cynergy3	FLOAT SWITCH 100VA PVDF NITRILE	0
	SENX-S198A-L915US myDevices	MEASURE LIQUIDS TO 50 FT. BELOW	0
	20017786-00 TE Connectivity Measurement Specialties	LS509-52 LIQUID LEVEL SENSOR	0
	ADEU-S012A-L868EU myDevices	ANTICIPATE AND PREVENT OVERFLOWS	0
	VP04EPM Carlo Gavazzi	SEN LVL OPTICAL MOD PNP NO	0
	VPA1MPA Carlo Gavazzi	SEN LVL OPTICAL POLYS PNP	0
	20017777-00 TE Connectivity Measurement Specialties	EVS722-51 LIQUID LEVEL SENSOR	0
	SPS2F001PET Sanyo Semiconductor/ON Semiconductor	ETSI-FLUID LEVEL-PET	0
	LLF73Y100RN Sensata Technologies – Cynergy3	FLOAT SWITCH NYLON 1M PVC	0
	LLF77HVP Sensata Technologies – Cynergy3	FLOAT SWITCH 100VA PVDF VITON	0
	20017616-02 TE Connectivity Measurement Specialties	VCS-02 LIQUID LEVEL SENSOR	0
	VH4 Carlo Gavazzi	LEVEL HANGING PROBE W/O CBL	0
	RBS306-WAT-US Radio Bridge Inc.	SENSOR LEVEL WATER DETECT LORA	0
	LLF73Y100RM Sensata Technologies – Cynergy3	FLOAT SWITCH 25VA NYLON 1M PVC S	0
	ELLN-S063A-L915US myDevices	ULTRA-LOW POWER. COMPATIBLE WITH	0
	LLF77Y100GV Sensata Technologies – Cynergy3	FLOAT SWITCH 100VA PVDF 1M PTFE	0
	VPC110 Carlo Gavazzi	LVL SNSR COND 1 PROBE 1IN PVC	0
	VT1 Carlo Gavazzi	LVL SNSR COND 1 PROBE PTFE	0
	LLF76Y100RN Sensata Technologies – Cynergy3	FLOAT SWITCH 25VA PPS 1M PVC NIT	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

Type	Functional Characteristics	Application Examples
Magnetic Float Switches	Hermetically sealed contacts activated by float movement	Water tanks, fuel storage
Mechanical Lever Arm	Physical linkage translating float motion to potentiometer	Industrial boilers, hydraulic systems
Guided Tube Float	Float moves along a vertical tube, triggering reed switches	Chemical processing, corrosive environments
Optical Float Sensors	Combines float mechanism with infrared detection	Medical 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

Parameter	Description	Importance
Measurement Range	0.1 10 meters	Determines application suitability
Accuracy	1 3% FS	Process control reliability
Output Signal	4 20 mA, 0 10V, SPST	System integration capability
Environmental Temp.	-40 C to +85 C	Operational stability
Process Connection	1/2" 4" NPT, DIN	Installation compatibility
Material Compatibility	PVDF, SS316, EPDM	Chemical 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

Manufacturer	Key Product	Features
Siemens	Float Switch Series 8ME	ATEX-certified, 0.1% repeatability
Honeywell	LM Series Level Switches	316SS construction, SIL2 rated
TE Connectivity	Mini-Level Switch	Compact 6mm diameter design
Endress+Hauser	Prosonic M Float Switch	Dual-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