Float, Level Sensors

Part Number	Description / PDF	Quantity
RSF166A25B175 Sensata Technologies – Cynergy3	DL PNT FLOATSWITCH 202MM TOTAL L	5
RSF16Y100TG Sensata Technologies – Cynergy3	SENSOR LEVEL VERTICAL POLYPROP	0
PLS-031B-3PPI PIC GmbH	MINIATURE LEVEL SENSOR	0
VPC205 Carlo Gavazzi	LVL SNR COND 2 PROBE 0.5IN PVC	4
SSF22X100-M12X1 Sensata Technologies – Cynergy3	MIN FS SS M12X1	0
RSF83YP Sensata Technologies – Cynergy3	FLOATSWITCH HORZ .6A NYLON	25
SSF212XPM12 Sensata Technologies – Cynergy3	HORIZ SS FLOATSW 1/2 EXT MNT	9
ILSEU-GI240-D Sensata Technologies – Cynergy3	SENSOR PRESSURE 0-240WG 0.5-4.5V	0
LLC510D3L SST Sensing	LIQUID LEVEL SENSOR	21
LI5143 ifm Efector	BINARY LEVEL SENSOR; PNP; SWITCH	0
FM10-SMD01-NCNC SMD Sensors	DUAL SWITCH 4" LONG 1/2" NPT,INT	25
OLS710D3L24-003 Sensata Technologies – Cynergy3	OPT LIQ LVL SENS 1/4 NPT MNT LW	23
TSF84Y100D Sensata Technologies – Cynergy3	THERMISTOR FLOAT SWTCH PP .6A	0
PLS-081A-6VAI PIC GmbH	STAINLESS STEEL POWER LEVEL SENS	88
S286-13	OIL LEVEL SWITCH 1/4" NPTF	50
ILSU-GI720-025 Sensata Technologies – Cynergy3	SENSOR PRESSURE 0-720WG 4-20MA	0
SSF67A25B225 Sensata Technologies – Cynergy3	DL SW PNT FLOATSW 200MM TOTAL L	0
RSF53Y100R1/8 Sensata Technologies – Cynergy3	FLOATSWITCH VERT .6A NO/NC NYL	18
SSF67B50B200 Sensata Technologies – Cynergy3	2 LEVEL SWITCH IN SS 316 25VA P	0
RSF73Y100RN Sensata Technologies – Cynergy3	FLOATSWITCH HORZ .6A NO/NC NYLON	20

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