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 41 - 60 of 384 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. 804-4159
Mfr. Part No.7ML1106-1BA200A
BrandSiemens
£446.06
Each
Units
Ultrasonic - - - - - -20°C +65°C - - - - - -
RS Stock No. 889-1346
Mfr. Part No.DL10-11
BrandFlowline
£288.42
Each
Units
Ultrasonic Level Transmitter Vertical - Polycarbonate 1.2m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS Stock No. 493-7192
Mfr. Part No.7ML5221-1DB11
BrandSiemens
£918.00
Each
Units
Ultrasonic - - PBT - - -40°C +85°C - - 20 mA - - -
RS Stock No. 804-4112
Mfr. Part No.7ML1201-1FE00
BrandSiemens
£968.00
Each
Units
Ultrasonic Vertical Relay - - - -40°C +60°C - - - - - -
RS Stock No. 768-2000
Mfr. Part No.WAVES61.EEJ2RA
BrandVega
£383.60
Each
Units
Vibrating Level Switch Cable Relay - - - -40°C +150°C - - 1 A dc, 3 A ac 1.1bar - -
RS Stock No. 285-778
Mfr. Part No.FFAK 16 PTD 1099/L
BrandBaumer
£130.09
Each
Units
Liquid Level Sensor Vertical/Horizontal PNP Polysulphone - - 0°C +65°C - - 200 mA 10bar - -
RS Stock No. 746-7523
Mfr. Part No.1SVR450056R0200
BrandABB
£13.22
Each
Units
Electrode Vertical - High Grade Steel, Stainless Steel - - - - - - - - - -
RS Stock No. 794-3430
Mfr. Part No.2120D1AT1E1XA0000
BrandRosemount
£422.28
Each
Units
Fork Level Switch Side or Top Mount Direct Load Aluminium - - -40°C +150°C - - 500 mA 100bar Non Asbestos Sheet -
RS Stock No. 804-3967
Mfr. Part No.7ML5735-2AA11-0AA0
BrandSiemens
£288.00
Each
Units
Vibrating Level Switch Vertical Relay - - - -40°C +150°C - - 8 A 10bar - -
RS Stock No. 889-1393
Mfr. Part No.DX10-00-8FT
BrandFlowline
£282.01
Each
Units
Ultrasonic Level Sensor Vertical - Polycarbonate 1.2m - -35°C +60°C - 24V 15 (Nominal) mA 30psi Viton -
RS Stock No. 113-711
Mfr. Part No.7ML5501-0EA10
BrandSiemens
£212.00
Each
Units
Capacitance Vertical - Stainless Steel 1m - -30°C +100°C - - 82 mA 10bar - -
RS Stock No. 776-1617
Mfr. Part No.072.51
BrandFinder
£31.95
Each
Units
Electrolode holder - - - - - - - - - - - - -
RS Stock No. 892-9750
Mfr. Part No.3102HP3FSCNA
BrandRosemount
£733.71
Each
Units
Level Transmitter Top Mount Relay Glass Filled Nylon - - -30°C +70°C - 40V 21.75 mA 3bar - -
RS Stock No. 892-9331
Mfr. Part No.3107HP2PG1I1
BrandRosemount
£522.57
Each
Units
Level Transmitter Suspended - UVPC 20m - -40°C +60°C - 30 (Hazardous area) V, 40 (Non-Hazardous area) V 21.75 mA 3bar - -
RS Stock No. 361-1732
Mfr. Part No.LP01
£11.08
Each
Units
Electrode Free - Stainless Steel, Vinyl - - - +70°C - - - - - -
RS Stock No. 740-6446
Mfr. Part No.LMT110
£172.73
Each
Units
Electronic Flush Mount PNP NO/NC FPM, PA12, PEEK, Stainless Steel - - 0°C +60°C - - 50 mA 16bar PEEK -
RS Stock No. 124-0142
Mfr. Part No.LO10-1305
BrandFlowline
£134.30
Each
Units
Flowline Detection Switch Vertical NO/NC PP 3m - -40°C +80°C - 36V - 10bar FKM 25 mA
RS Stock No. 804-3850
Mfr. Part No.7ML5501-0EA70
BrandSiemens
£268.00
Each
Units
Capacitance Switch Vertical Relay Stainless Steel - - -30°C +100°C - - - 10bar - -
RS Stock No. 439-0082
Mfr. Part No.SLX4
BrandTempatron
£20.48
Each
Units
- PCB Mount NPN - - - -20°C +65°C - - 50 mA - - -
RS Stock No. 794-3421
Mfr. Part No.2120D1AT1NAAA0000
BrandRosemount
£290.32
Each
Units
Fork Level Switch Side or Top Mount Direct Load Glass Filled Nylon - - -40°C +150°C - - 500 mA 100bar Non Asbestos Sheet -
Related Products
The ifm electronic level sensor has a supply ...
Description:
The ifm electronic level sensor has a supply voltage ranging between 18VDC and 30VDC it operates to a capacitive measuring principle. The sensor with protection rating IP67 is optimised for use in hydrous coolants and oils on machine tools and hydraulic power packs. The current level is visible on the ...
The Vega conductive level switch has a relay ...
Description:
The Vega conductive level switch has a relay (SPDT) output. It is designed specifically for measuring conductive liquids and particularly useful for taking measurements in full or empty pipelines. The multiple rods that feature on this limit switch deliver reliable pump control. The exchangeable and adjustable probes reduce stock keeping ...
Siemens horizontal mounting level probe is a 2-pole, ...
Description:
Siemens horizontal mounting level probe is a 2-pole, bow electrode for lateral installation and level monitoring. Screw-in adapter wrench size 223/8in thread connection Connection cable PVC 3 x 0.5mm2Cable length is 2m long Maximum operating temperature is 90°COperating pressure 10bar maximum.
IP66 rated Measuring range up to 10m Unaffected ...
Description:
IP66 rated Measuring range up to 10m Unaffected by temperature, vacuum, pressure, vapours, gases, dust, foam or build-up Accurate to 5mm using Echofox technology Maintenance-free rugged design Also requires : Single stainless steel 10m long (Ø4mm) suspension cable (item 493-6830) with gravity weight, or 2m (Ø6mm) rod (item 493-6846) providing ...