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 335 products
Results per page
Description Price Device Type Mounting Type Switch Output Body Material Cable Length Minimum Operating Temperature Maximum Operating Temperature Maximum AC Voltage Maximum DC Voltage Maximum Current Maximum Pressure Gasket Material Current Rating Hazardous Area Certification
RS Stock No. 539-5735
Mfr. Part No.CP64.XXFGARKMX L=300
BrandVega
HK$9,753.75
Each
units
Capacitance Horizontal, Vertical Relay PTFE - -50°C +200°C - - 1 A dc, 3 A ac 64bar - - -
RS Stock No. 776-1608
Mfr. Part No.072.31
BrandFinder
HK$114.27
Each
units
Electrode Vertical Relay Stainless Steel - 0°C +80°C - - - - - - -
RS Stock No. 901-0299
Mfr. Part No.PS61.XXBXXHKMXX
BrandVega
HK$17,818.70
Each
units
Radar Sensor Panel Mount HART Polypropylene - -40°C +80°C 253V 48V 20 mA 3bar FPM 4 → 20 mA -
New
RS Stock No. 188-5257
Mfr. Part No.VN1
HK$346.89
Each
units
Conductive Cable - Nylon 6 2m 0°C +90°C - - - 10bar - - -
RS Stock No. 182-5612
Mfr. Part No.PS69.AXBXXCHXKMXXX
BrandVega
HK$24,960.76
Each
units
Level Sensor Slip on Flange or Bracket 2 Wire, 4 to 20 mA PTB VALOX - -40°C +80°C 253V 35V 22 mA 2bar - 4 → 20 mA ATEX
RS Stock No. 468-3441
Mfr. Part No.SN62XXAGHKMA
BrandVega
HK$11,833.80
Each
units
Ultrasonic - - Plastic - -40°C +80°C - - 20 mA 2bar - - -
RS Stock No. 892-9369
Mfr. Part No.2130MA2MS1NNBA00001I1
BrandRosemount
HK$4,735.77
Each
units
Fork Level Switch Side or Top Mount - Aluminium - -40°C +180°C - - 500 mA 100bar - - -
RS Stock No. 768-2028
Mfr. Part No.VIBS61.EXX2RA
BrandVega
HK$4,348.35
Each
units
Sensor Cable Relay - - -40°C +150°C - - 1 A dc, 3 A ac 1.1bar - - -
RS Stock No. 124-0111
Mfr. Part No.DL14-01
BrandFlowline
HK$3,397.22
Each
units
Ultrasonic Level Transmitter Vertical - ABS, PC 1.2m -35°C +60°C - 24V 20 mA 2bar FKM 1 A -
RS Stock No. 780-0315
Mfr. Part No.OLS700D3LSH
BrandCynergy3
HK$270.69
Each
units
Optical Sensor Chassis Mount Transistor Polysulfone 250mm -25°C +80°C - - 100 mA 7bar - - -
RS Stock No. 124-0126
Mfr. Part No.LU80-5101
BrandFlowline
HK$5,555.34
Each
units
Ultrasonic Level Transmitter Vertical - PC - -40°C +71°C - 28V 20 mA 2bar FKM - -
RS Stock No. 780-0337
Mfr. Part No.OLS710D3L24-003
BrandCynergy3
HK$716.82
Each
units
Optical Sensor Chassis Mount Transistor Polysulfone 250mm -40°C +125°C - - 1 A 7bar - - -
RS Stock No. 776-1597
Mfr. Part No.072.01.06
BrandFinder
HK$139.11
Each
units
Electrode Vertical Relay - 6m 0°C +100°C - - - - - - -
RS Stock No. 768-1974
Mfr. Part No.SONS62.EXXA
BrandVega
HK$8,118.70
Each
units
Vibrating Rod Chassis Mount - ABS - -40°C +80°C - - 20 mA - - - -
RS Stock No. 746-7526
Mfr. Part No.1SVR402902R0000
BrandABB
HK$151.00
Each
units
Electrode - - Steel - - - - - - - - - -
RS Stock No. 906-8121
Mfr. Part No.143570
HK$1,101.74
Each
units
Level Switch Horizontal, Vertical NC Polysulfone 14in -17.8°C +80°C - 28V 40 mA 150psi - 18 mA -
RS Stock No. 804-4146
Mfr. Part No.7ML1123-0CA50
BrandSiemens
HK$11,775.28
Each
units
Ultrasonic - - - - -40°C +95°C - - - - - - -
RS Stock No. 377-9894
Mfr. Part No.VN4
HK$697.00
Each
units
Conductive - - Nylon 6 2m 0°C +90°C - - - 10bar - - -
RS Stock No. 776-1623
Mfr. Part No.072.501
BrandFinder
HK$42.77
Each
units
- - - - - - - - - - - - - -
RS Stock No. 616-3006
Mfr. Part No.208998
HK$339.48
Each
units
Electro Optic Horizontal, Vertical - Polyethersulfone - -40°C +125°C - - 18 mA 250psi - - -
Related Products
Internal electronic circuit generates pulses every 36s for ...
Description:
Internal electronic circuit generates pulses every 36s for meteringMetering may be interrupted without losing unrecorded time (since last pulse)Operating temperature -10 to +60°CIP65 environmental rating5 - 12 Vdc operation; may be operated at higher supply voltages by adding external components. ...
ResettableCount capacity 99999.9h. ...
Description:
ResettableCount capacity 99999.9h.
The 6320 Series of electronic Hour Meters with ...
Description:
The 6320 Series of electronic Hour Meters with 8 LCD digits brings more features to the user than ever before. Available in single and/or multi-function units, the array of functions and options make the 6320 series suitable for a variety ...
RS Pro Digital hour meters come in a ...
Description:
RS Pro Digital hour meters come in a small variety of bezels and a wide range of supply voltage. • 6-digit (5 mm) LCD display• Panel mounting• Wide range of supply voltage• Remote reset• Available in 3 different bezels (depending ...