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. 377-9872
Mfr. Part No.VN2
PHP3,289.40
Each
units
Conductive Cable - Nylon 6 2m - 0°C +90°C - - - 10bar - -
RS Stock No. 204-6749
Mfr. Part No.003S2
BrandMobrey
PHP17,346.59
Each
units
Gap Sensor Level Alarm Switch Horizontal, Vertical Relay Polyphenylene Sulfide 3m - -20°C +70°C - - 1 A 5bar - -
RS Stock No. 493-6802
Mfr. Part No.SG51.XXSGBTPV
BrandVega
PHP16,560.77
Each
units
Tuning Fork Horizontal PNP Stainless Steel - - -40°C +100°C - - 250 mA 64bar - -
RS Stock No. 613-3522
Mfr. Part No.SG51.XXSGATPV
BrandVega
PHP14,256.40
Each
units
Tuning Fork Horizontal PNP Stainless Steel - - -40°C +100°C - - 250 mA 64bar - -
RS Stock No. 122-4867
Mfr. Part No.LVL-A7-AG3A-E5PU-NA
PHP12,003.55
Each
units
Limit Switch Flush Mount PNP Stainless Steel 316L 5m - -40°C +70°C - 35V 250 mA 40bar - <15 (DC-PNP) mA
RS Stock No. 889-1400
Mfr. Part No.FT10-1305
BrandFlowline
PHP13,423.74
Each
units
Liquid and Gas Flow Switch Cable - Polypropylene 3m - -40°C +60°C - 36V - 150psi Viton 1 A
RS Stock No. 794-3434
Mfr. Part No.211010A1NA
BrandRosemount
PHP10,667.77
Each
units
Fork Level Switch Side or Top Mount PNP Stainless Steel - - -40°C +150°C - - 500 mA 100bar - -
RS Stock No. 794-3418
Mfr. Part No.211001A1NA
BrandRosemount
PHP9,858.09
Each
units
Fork Level Switch Side or Top Mount Direct Load Stainless Steel - - -40°C +150°C - - 500 mA 100bar - -
RS Stock No. 377-9888
Mfr. Part No.VN3
PHP4,151.63
Each
units
Conductive Cable - Nylon 6 2m - 0°C +90°C - - - 10bar - -
RS Stock No. 387-0341
Mfr. Part No.CAP98XPXD
BrandVega
PHP23,599.33
Each
units
Capacitance Horizontal, Vertical Relay Polypropylene - - -30°C +80°C - - 1 A dc, 3 A ac - - -
RS Stock No. 613-3415
Mfr. Part No.SN61.CXAGHKMX
BrandVega
PHP85,858.26
Each
units
Ultrasonic Vertical - Plastic - - -40°C +80°C - - 20 mA 2bar EPDM Rubber -
RS Stock No. 889-1194
Mfr. Part No.LU27-00
BrandFlowline
PHP36,237.10
Each
units
Ultrasonic Level Transmitter Vertical - Polycarbonate 3m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS Stock No. 804-4130
Mfr. Part No.7ML1115-0CA30
BrandSiemens
PHP40,387.96
Each
units
Ultrasonic - - - - - -20°C +95°C - - - - - -
RS Stock No. 776-1610
Mfr. Part No.072.53
BrandFinder
PHP3,270.38
Each
units
- - - - - - - - - - - - - -
RS Stock No. 377-9894
Mfr. Part No.VN4
PHP5,062.89
Each
units
Conductive - - Nylon 6 2m - 0°C +90°C - - - 10bar - -
RS Stock No. 780-0179
Mfr. Part No.SSF22X100-M12X1
BrandCynergy3
PHP4,806.87
Each
units
Level Switch Vertical - Stainless Steel 1m - -20°C +120°C - - 500 mA 10bar - -
RS Stock No. 804-4140
Mfr. Part No.7ML1106-2BA200A
BrandSiemens
PHP34,711.85
Each
units
Ultrasonic - - - 10m - -20°C +65°C - - - - - -
RS Stock No. 889-1393
Mfr. Part No.DX10-00-8FT
BrandFlowline
PHP21,945.68
Each
units
Ultrasonic Level Sensor Vertical - Polycarbonate 1.2m - -35°C +60°C - 24V 15 (Nominal) mA 30psi Viton -
RS Stock No. 889-1208
Mfr. Part No.LU27-40
BrandFlowline
PHP41,202.72
Each
units
Ultrasonic Level Transmitter Vertical - Polycarbonate 4.6m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS Stock No. 613-3386
Mfr. Part No.SG51.XXTGATPVL
BrandVega
PHP17,528.67
Each
units
Tuning Fork Horizontal PNP Stainless Steel - - -40°C +150°C - - 20 mA 64bar - -
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