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
RS Stock No. 794-3395
Mfr. Part No.LFP0500-G1NMB
BrandSick
SGD1,246.40
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. 794-3399
Mfr. Part No.LFP1000-G1NMB
BrandSick
SGD1,246.40
Each
units
Guided Radar Vertical 0-10 V, 4-20 mA Stainless Steel - IO-LINK -20°C +150°C - - 100 mA 16bar PEEK -
RS Stock No. 794-3409
Mfr. Part No.LFP2000-G1NMB
BrandSick
SGD1,246.40
Each
units
Guided Radar Vertical 0-10 V, 4-20 mA Stainless Steel - IO-LINK -20°C +150°C - - 100 mA 16bar PEEK -
RS Stock No. 794-3392
Mfr. Part No.LFP2000-A4NMB
BrandSick
SGD755.94
Each
units
Guided Radar Vertical 0-10 V, 4-20 mA PBT - IO-LINK -20°C +100°C - - 100 mA 10bar PTFE -
RS Stock No. 794-3389
Mfr. Part No.LFP0500-A4NMB
BrandSick
SGD732.38
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. 213-3273
Mfr. Part No.LFH-SBX40G1AS10SZ0
BrandSick
SGD794.64
Each
units
Pressure Cable - Stainless Steel 10m - -10°C +50°C - 30V 25 mA 0.4bar - 25 mA
New
RS Stock No. 213-3372
Mfr. Part No.UP56-213128
BrandSick
SGD1,190.98
Each
units
Ultrasonic Level Sensor G1 Thread, Vertical - Stainless Steel - - -25°C +70°C - 30V 200 mA 6bar FKM 200 mA
RS Stock No. 183-7322
Mfr. Part No.GRF18S-P234LV
BrandSick
SGD116.80
Each
units
Optical Point Level Switch G1/2 Thread NC, PNP Stainless Steel - - -25°C +55°C - 30V - 16bar - ≤30 mA
RS Stock No. 175-5065
Mfr. Part No.PFT-FRBX25SF1OSSAMSSZ
BrandSick
SGD510.40
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 - -
RS Stock No. 175-5062
Mfr. Part No.LFV200-XXSGHIPM
BrandSick
SGD363.20
Each
units
Vibrating Level Switch G3/4” Thread PNP PEI, Stainless Steel 1.4404 - IO-LINK -40°C +70°C - 30V 250 mA 64bar - -
New
RS Stock No. 213-3277
Mfr. Part No.LFP0300-A5NMC
BrandSick
SGD777.31
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. 213-3265
Mfr. Part No.LBV310-XXAGDRKMX
BrandSick
SGD906.06
Each
units
Vibrating Level Switch Vertical/Horizontal G1 1/2 Thread DPDT Relay Plastic, Stainless Steel - - -50°C +150°C 253V 72V <3A AC/<1A DC 25bar - 3A AC/<1A DC A
New
RS Stock No. 213-3274
Mfr. Part No.LFH-SBX60G1AS10SZ0
BrandSick
SGD794.64
Each
units
Pressure Cable - Stainless Steel 10m - -10°C +50°C - 30V 25 mA 0.6bar - 25 mA
New
RS Stock No. 213-3272
Mfr. Part No.LFH-SBX25G1AS05SZ0
BrandSick
SGD746.54
Each
units
Pressure Cable - Stainless Steel 5m - -10°C +50°C - 30V 25 mA 0.25bar - 25 mA
New
RS Stock No. 213-3286
Mfr. Part No.LFV200-XXSGATPV
BrandSick
SGD411.05
Each
units
Vibrating Level Switch G1 Thread, Vertical/Horizontal PNP NO/NC PEI, Stainless Steel - - -50°C +150°C - 35V 250 mA 25bar - 250 mA
New
RS Stock No. 213-3267
Mfr. Part No.LBV311-XXAGCRKMX
BrandSick
SGD1,058.23
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
New
RS Stock No. 213-3266
Mfr. Part No.LBV310-XXAGDTKMX
BrandSick
SGD906.06
Each
units
Vibrating Level Switch Vertical/Horizontal G1 1/2 Thread - Plastic, Stainless Steel - - -50°C +150°C - 55V 300 mA 25bar - 300 mA
RS Stock No. 175-5067
Mfr. Part No.UP56-213118
BrandSick
SGD948.80
Each
units
Ultrasonic Level Sensor with display G1 Thread 0-10, PNP, 4 to 20 mA PBT, Stainless Steel 1.4571, TPU - - -25°C +70°C - 30V 20 mA 6bar - -
New
RS Stock No. 213-3290
Mfr. Part No.LFV200-XXSGBTPML
BrandSick
SGD428.54
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
New
RS Stock No. 213-3264
Mfr. Part No.LBV310-XXAGDRAMX
BrandSick
SGD928.80
Each
units
Vibrating Level Switch Vertical/Horizontal G1 1/2 Thread DPDT Relay Aluminium, Stainless Steel - - -50°C +150°C 253V 72V <3A AC/<1A DC 25bar - 3A AC/<1A DC A