Level Sensors

Level sensors determine how full or how empty a container is. Level sensors provide an output electrical signal at predetermined levels to communicate when to open or close control valves.


Level Sensor Types


The choice of sensors is usually determined by which substance is being measured, the environment in which the sensor is to used and in which position the sensor needs to be mounted. Some of the most common level sensors are:


Capacitive level switches


  • Capacitive level switches provide a basic full/empty level indication determined by the mounting position of the sensor. This type of switch is non-contact and uses a sensing field to determine liquid levels. Capacitive sensors provide accurate switching even with heavy residue build-up.

Vibrating level probes


  • Vibrating level probes use a rod or a fork that constantly produce high-frequency vibrations. When the vibrating probe comes into contact with the medium, the vibration changes and the vibrating level switch outputs a switching command. Vibrating level switches are used as overfill protection devices or low-level indicators in liquids as well as in granular and powder bulk solids.

Conductive level switches


  • Conductive level switches are sensors that use stainless steel probes with an electrical contact output to measure a specific liquid level. Used in conjunction with a level control relay to set and monitor each probe. Applications include ponds, reservoirs, sumps, pharmaceuticals, closed vessels and open tanks.

Ultrasonic level sensors


  • Ultrasonic level sensors generate ultrasonic sound pulses that are reflected by the surface of a liquid medium. The time travelled by the ultrasonic pulse is calculated by the sensor which then determines the distance of the liquid to give an accurate fill level. The ultrasonic sensor’s response is influenced by turbulence, pressure, moisture, and temperature.

...
Read more Read less

Filters

Viewing 81 - 100 of 432 products
Results per page
Description Price Device Type Mounting Type Switch Output Body Material Cable Length Communication Protocol Minimum Operating Temperature Maximum Operating Temperature Maximum AC Voltage Maximum DC Voltage Maximum Current Maximum Pressure Gasket Material Current Rating
RS Stock No. 892-9754
Mfr. Part No.3105HP3FSCI1
BrandRosemount
PHP58,739.96
Each
units
Level Transmitter Top Mount Relay Glass Filled Nylon - - -30°C +70°C - 30 (Hazardous area) V, 40 (Non-Hazardous area) V 21.75 mA 3bar - -
RS Stock No. 869-7680
Mfr. Part No.ILSE-G0100-5
BrandCynergy3
PHP12,265.35
Each
units
Pressure Chassis Mount 4-20mA Stainless Steel - - - - - 32V 28 mA 20bar - -
RS Stock No. 387-0379
Mfr. Part No.KON66.XG3VPR
BrandVega
PHP26,337.77
Each
units
Conductive Vertical Relay Plastic - - -40°C +100°C - - 1 A dc, 3 A ac 6bar - -
RS Stock No. 493-6852
Mfr. Part No.PS61.XXAGPHKMXX
BrandVega
PHP117,430.90
Each
units
Radar Vertical - Plastic - - -40°C +80°C - - 20 mA 2bar - -
RS Stock No. 889-1365
Mfr. Part No.DL24-00
BrandFlowline
PHP33,216.18
Each
units
Ultrasonic Level Transmitter Vertical 2 Wire Relay Polycarbonate 1.2m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS Stock No. 892-9763
Mfr. Part No.03100-1003-0002
BrandRosemount
PHP6,572.58
Each
units
BSP Bracket Flange Mount - - - - - - - - - - - -
RS Stock No. 185-9869
Mfr. Part No.S01DB/F68/4
BrandMobrey
PHP32,324.37
Each
units
Liquid Level Switch Side Mount SPST Aluminium Bronze - - - +210°C - - 2 A dc, 3 A ac 18bar Non Asbestos Sheet -
RS Stock No. 494-1084
Mfr. Part No.LLNE8651721
BrandHoneywell
PHP46,615.55
Each
units
Level Switch Exterior Mounting NPN Stainless Steel - - -40°C +125°C - - 60 mA 25bar - -
RS Stock No. 794-3437
Mfr. Part No.2120D1AV1NAAA0000
BrandRosemount
PHP18,073.42
Each
units
Fork Level Switch Side or Top Mount Relay Glass Filled Nylon - - -40°C +150°C - - 500 mA 100bar Non Asbestos Sheet -
RS Stock No. 616-3028
Mfr. Part No.208995
PHP2,770.35
Each
units
Electro Optic Horizontal, Vertical - Polyethersulfone - - -40°C +125°C - - 18 mA 250psi - -
RS Stock No. 439-0082
Mfr. Part No.SLX4
BrandTempatron
PHP1,606.48
Each
units
- PCB Mount NPN - - - -20°C +65°C - - 50 mA - - -
RS Stock No. 768-1965
Mfr. Part No.SONS61.EXXA
BrandVega
PHP49,475.64
Each
units
Vibrating Rod - Relay - - - - - - - 20 mA - - -
RS Stock No. 804-3967
Mfr. Part No.7ML5735-2AA11-0AA0
BrandSiemens
PHP22,411.81
Each
units
Vibrating Level Switch Vertical Relay - - - -40°C +150°C - - 8 A 10bar - -
RS Stock No. 204-6733
Mfr. Part No.003H2
BrandMobrey
PHP18,108.43
Each
units
Gap Sensor Level Alarm Switch Horizontal, Vertical FET Polyphenylene Sulfide 3m - -40°C +105°C - - 100 mA 5bar - -
RS Stock No. 901-0292
Mfr. Part No.FX82.IXXTBFHXKMXX
BrandVega
PHP96,087.54
Each
units
TDR Sensor Cable HART Stainless Steel 75m - -40°C +80°C 253V 48V 20 mA 40bar EPDM Rubber, FFKM, FKM 4 → 20 mA
RS Stock No. 208-7453
Mfr. Part No.B59010-D1135-B40
BrandEPCOS
PHP1,069.23
Each
units
Thermistor - - Stainless Steel - - -25°C +55°C - - 45 mA 10bar - -
RS Stock No. 901-0299
Mfr. Part No.PS61.XXBXXHKMXX
BrandVega
PHP119,605.94
Each
units
Radar Sensor Panel Mount HART Polypropylene - - -40°C +80°C 253V 48V 20 mA 3bar FPM 4 → 20 mA
RS Stock No. 768-2069
Mfr. Part No.SWINGS52.EEA7CV
BrandVega
PHP23,276.50
Each
units
Level Switch Chassis Mount PNP - - - - +150°C - - - - - -
RS Stock No. 794-3395
Mfr. Part No.LFP0500-G1NMB
BrandSick
PHP57,272.50
Each
units
Sensor Vertical 0-10 V, 4-20 mA Stainless Steel 500mm IO-LINK -20°C +150°C - - 100 mA 16bar PEEK -
RS Stock No. 407-2368
Mfr. Part No.LA9RM201
PHP3,813.12
Each
units
Electrode Cable Suspension - - - - - +100°C - - - - - -
Related Products
Fill level monitoring by means of guided microwavesUpdated ...
Description:
Fill level monitoring by means of guided microwavesUpdated display of the current fill levelProgrammable hysteresis and window functionSimple operation via the user menuThe length of the sensor probe can be shortened as desiredAvailable probes 228 mm (RS order no. 488-047) ...
Comprehensive range of accessories for Flowline's successful EchoPulse ...
Description:
Comprehensive range of accessories for Flowline's successful EchoPulse series. Accessories include a variety Reducer bushings covering a range of Thread forms & diameters, ANSI flanges, indicators, enclosures & controllers. Thanks to the wide array of accessories on offer the EchoPulse ...
Robust & reliable 26GHz pulse radar level transmitter ...
Description:
Robust & reliable 26GHz pulse radar level transmitter from Flowline provides the user with continuous level measurement up to 10m. EchoPulse LR15 series is designed for use within a comprehensive range of applications, including corrosive and agitation media. IP67 rated ...
Single probe holder with black vinyl coverStainless steel ...
Description:
Single probe holder with black vinyl coverStainless steel probe (to EN 10088//3) includedMaximum operating temperature; 70°CConnection via M3 screw terminal or crimp (supplied)Side vents incorporated in coverDimensions; L100 x Dia.20 (max.).