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.

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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
New
RS Stock No. 213-3267
Mfr. Part No.LBV311-XXAGCRKMX
BrandSick
TWD23,074.00
Each
units
Vibrating Level Switch G1 Thread, Vertical/Horizontal DPDT Relay Plastic, Stainless Steel - - -50°C +150°C 253V 72V <3A AC/<1A DC 25bar - 3A AC/<1A DC A
RS Stock No. 175-5068
Mfr. Part No.UP56-214178
BrandSick
TWD39,600.00
Each
units
Ultrasonic Level Sensor with display G2 Thread 0-10, PNP, 4 to 20 mA PBT, PVDF, TPU - - -25°C +70°C - 30V 20 mA 6bar - -
RS Stock No. 794-3392
Mfr. Part No.LFP2000-A4NMB
BrandSick
TWD16,483.00
Each
units
Guided Radar Vertical 0-10 V, 4-20 mA PBT - IO-LINK -20°C +100°C - - 100 mA 10bar PTFE -
New
RS Stock No. 213-3297
Mfr. Part No.LFV200-XXTGBTPM
BrandSick
TWD8,810.00
Each
units
Vibrating Level Switch G3/4 Thread, Vertical/Horizontal PNP NO/NC PEI, Stainless Steel - - -40°C +150°C - 35V 250 mA 64bar - 250 mA
RS Stock No. 175-5063
Mfr. Part No.PFT-FRB1X0SF1OSSAMSSZ
BrandSick
TWD16,800.00
Each
units
Hydrostatic Level Sensor G1 Thread 2 Wire, 4 to 20 mA Stainless Steel 1.4571 - - -20°C +80°C - 30V 20 mA 1bar - -
New
RS Stock No. 213-3268
Mfr. Part No.LBV311-XXAGCTKMX
BrandSick
TWD23,074.00
Each
units
Vibrating Level Switch G1 Thread, Vertical/Horizontal - Plastic, Stainless Steel - - -50°C +150°C - 55V 300 mA 25bar - 300 mA
New
RS Stock No. 213-3299
Mfr. Part No.LFV200-XXTGHTPM
BrandSick
TWD8,810.00
Each
units
Vibrating Level Switch G1/2 Thread, Vertical/Horizontal PNP NO/NC PEI, Stainless Steel - - -40°C +150°C - 35V 250 mA 64bar - 250 mA
RS Stock No. 794-3389
Mfr. Part No.LFP0500-A4NMB
BrandSick
TWD15,969.00
Each
units
Guided Radar Vertical 0-10V, NPN, 2 PNP, 4-20mA PBT - IO-LINK -20°C +100°C - - 100 mA 10bar PTFE -
New
RS Stock No. 213-3298
Mfr. Part No.LFV200-XXTGBTPV
BrandSick
TWD9,077.00
Each
units
Vibrating Level Switch G3/4 Thread, Vertical/Horizontal PNP NO/NC PEI, Stainless Steel - - -40°C +150°C - 35V 250 mA 64bar - 250 mA
RS Stock No. 175-5064
Mfr. Part No.PFT-FRBX10SF10SSAMSSZ
BrandSick
TWD16,800.00
Each
units
Hydrostatic Level Sensor G1 Thread 2 Wire, 4 to 20 mA Stainless Steel 1.4571 - - -20°C +80°C - 30V 20 mA 0.1bar - -
New
RS Stock No. 213-3279
Mfr. Part No.LFP0500-A5NMC
BrandSick
TWD16,949.00
Each
units
Guided Radar G3/4 Thread, Vertical - Plastic PBT - IO-LINK -20°C +100°C - 30V 100 mA 10bar PTFE 100 mA
RS Stock No. 175-5059
Mfr. Part No.LFV200-XXSGAIPM
BrandSick
TWD13,500.00
Each
units
Vibrating Level Switch G1 Thread PNP PEI, Stainless Steel 1.4404 - IO-LINK -40°C +70°C - 30V 250 mA 64bar - -
RS Stock No. 794-3395
Mfr. Part No.LFP0500-G1NMB
BrandSick
TWD42,000.00
Each
units
Sensor Vertical 0-10 V, 4-20 mA Stainless Steel 500mm IO-LINK -20°C +150°C - - 100 mA 16bar PEEK -
New
RS Stock No. 213-3276
Mfr. Part No.LFP0300-A4NMB
BrandSick
TWD15,942.00
Each
units
Guided Radar G3/4 Thread, Vertical - Plastic PBT - IO-LINK -20°C +100°C - 30V 100 mA 10bar PTFE 100 mA
RS Stock No. 175-5065
Mfr. Part No.PFT-FRBX25SF1OSSAMSSZ
BrandSick
TWD16,800.00
Each
units
Hydrostatic Level Sensor G1 Thread 2 Wire, 4 to 20 mA Stainless Steel 1.4571 - - -20°C +80°C - 30V 20 mA 0.25bar - -
New
RS Stock No. 213-3300
Mfr. Part No.LFV230-XXSGBTPM0200
BrandSick
TWD10,603.00
Each
units
Vibrating Level Switch G3/4 Thread, Vertical/Horizontal PNP NO/NC PEI, Stainless Steel - - -40°C +150°C - 35V 250 mA 64bar - 250 mA
New
RS Stock No. 213-3295
Mfr. Part No.LFV200-XXTGATPV
BrandSick
TWD9,726.00
Each
units
Vibrating Level Switch G1 Thread, Vertical/Horizontal PNP NO/NC PEI, Stainless Steel - - -40°C +150°C - 35V 250 mA 64bar - 250 mA
New
RS Stock No. 213-3274
Mfr. Part No.LFH-SBX60G1AS10SZ0
BrandSick
TWD17,327.00
Each
units
Pressure Cable - Stainless Steel 10m - -10°C +50°C - 30V 25 mA 0.6bar - 25 mA
New
RS Stock No. 213-3280
Mfr. Part No.LFP1000-A5NMC
BrandSick
TWD16,949.00
Each
units
Guided Radar G3/4 Thread, Vertical - Plastic PBT - IO-LINK -20°C +100°C - 30V 100 mA 10bar PTFE 100 mA
New
RS Stock No. 213-3282
Mfr. Part No.LFV200-XASGBTPM
BrandSick
TWD9,039.00
Each
units
Vibrating Level Switch G3/4 Thread, Vertical/Horizontal PNP NO/NC PEI, Stainless Steel - - -40°C +100°C - 35V 250 mA 64bar - 250 mA