Float, Level Sensors

Part Number	Description / PDF	Quantity
MS10C Sensata Technologies – Cynergy3	CABLE FLOAT SPDT 10A POLY	0
RSF106H050TV Sensata Technologies – Cynergy3	FLOATSWITCH VERT 100VA PPS	0
SSF67A25B150 Sensata Technologies – Cynergy3	SWITCH 2 LEVEL SS NO/NC .6A	0
RSF58Y100R1/8 Sensata Technologies – Cynergy3	FLOATSWITCH VERT .6A NO/NC POLY	24
SSF67A25B200 Sensata Technologies – Cynergy3	DL LVL FLOATSW 227MM TOTAL L	0
PLS-045B-6VAI PIC GmbH	STAINLESS STEEL POWER LEVEL SENS	104
BCS001A Balluff	SENSOR LEVEL MINI FLAT CAPAC	3
SSF22X100-18N Sensata Technologies – Cynergy3	MIN FS SS 1/8NPT INT	5
FM04-1710-GRE1 SMD Sensors	DUAL SWITCH PP 7.3" LONG M10	16
ILLSU-GI048-5-003 Sensata Technologies – Cynergy3	SENSOR PRES 0-48"WG 4-20MA 3M	0
TSF46Y050TG Sensata Technologies – Cynergy3	THERMISTOR FLOAT SWITCH PPS .6A	0
SSF24X100 Sensata Technologies – Cynergy3	FLOATSWITCH 50VA NC/NO VERT SS	0
ILTS-G0500-007 Sensata Technologies – Cynergy3	SENSOR PRESSURE 0-5MWG 4-20MA	0
RSF43HFP Sensata Technologies – Cynergy3	FLOATSWITCH HORIZ 1A NO/NC NYLON	0
FSV-31 Carlo Gavazzi	FLOAT SWITCH VERT 1/8 PT PP	2
FM10-SMD10-NCNC SMD Sensors	DUAL SWITCH 4" LONG 1" NPT, EXT	25
RSF77YVP Sensata Technologies – Cynergy3	HORIZ SPNO 25VA PVDF VITON M12 P	0
SEN-10221 SparkFun	LIQUID LEVEL SENSOR 8	0
LM10BW Sensata Technologies – Cynergy3	CABLE FLOAT SPST-NC 10A PVC	0
RSF44YFP Sensata Technologies – Cynergy3	FLOATSWITCH HORZ .6A POLYPROP	25

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