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庫存編號 794-3421
製造零件編號2120D1AT1NAAA0000
HK$3,375.87
單位
Fork Level Switch Side or Top Mount Direct Load Glass Filled Nylon - - -40°C +150°C - - 500 mA 100bar Non Asbestos Sheet -
全新
RS庫存編號 206-7078
製造零件編號GB101089056
BrandVega
HK$1,720.96
單位
Tuning Fork G3/4 Thread PNP Stainless Steel - IO-LINK -40°C +100°C - 35V - 64bar - -
RS庫存編號 193-6788
製造零件編號LLG810D3L24-004-D
HK$2,087.48
單位
Liquid Level Switch Threaded Mount PNP Stainless Steel 316L - - -40°C +125°C - 30V 7.5 mA 600bar - 7.5 mA
RS庫存編號 616-2996
製造零件編號208997
HK$407.26
單位
Electro Optic Horizontal, Vertical - Polyethersulfone 150mm - -40°C +125°C - - 18 mA 250psi - -
RS庫存編號 122-8434
製造零件編號232181
HK$1,498.86
單位
Electro Optic Vertical/Horizontal NC Brass 6in - -40°C +110°C - 12V - 17bar - 10 mA
RS庫存編號 193-6752
製造零件編號LLC210D3L24-004
HK$456.46
單位
Liquid Level Switch Threaded Mount PNP Polysulfone - - -40°C +125°C - 30V 7.5 mA 7bar - 7.5 mA
全新
RS庫存編號 205-1297
製造零件編號14241337
BrandWIKA
HK$2,089.69
單位
Optoelectronic Panel Mount PNP Stainless Steel - - - - - - - - - -
全新
RS庫存編號 213-3272
製造零件編號LFH-SBX25G1AS05SZ0
BrandSick
HK$4,268.10
單位
Pressure Cable - Stainless Steel 5m - -10°C +50°C - 30V 25 mA 0.25bar - 25 mA
RS庫存編號 193-6761
製造零件編號LLC710D3L24-004
HK$456.46
單位
Liquid Level Switch Threaded Mount PNP Polysulfone - - -40°C +125°C - 30V 7.5 mA 7bar - 7.5 mA
RS庫存編號 768-1971
製造零件編號SONS62.EXXX
BrandVega
HK$7,943.05
單位
Vibrating Rod Chassis Mount - ABS - - -40°C +80°C - - 20 mA - - -
RS庫存編號 804-4112
製造零件編號7ML1201-1FE00
BrandSiemens
HK$15,253.28
單位
Ultrasonic Vertical Relay - - - -40°C +60°C - - - - - -
RS庫存編號 768-2072
製造零件編號TRENN149AEX.X
BrandVega
HK$2,328.07
單位
Sensor DIN Rail - - - - - - - - 20 mA - - -
RS庫存編號 780-0305
製造零件編號OLS500D3L
BrandCynergy3
HK$341.17
單位
Optical Sensor Chassis Mount Transistor Polysulfone 250mm - -25°C +80°C - - 100 mA 20bar - -
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RS庫存編號 210-0693
製造零件編號LFFS-034.0
BrandBaumer
HK$4,740.84
單位
Level Switch Threaded PNP Stainless Steel 250mm - - - - - - - - -
RS庫存編號 498-7349
製造零件編號VB61.XXAGDRKMX
BrandVega
HK$7,209.50
單位
Vibrating Rod Free Relay Plastic - - -50°C +150°C - - 1 A dc, 3 A ac 16bar - -
RS庫存編號 193-6790
製造零件編號LLG210D3L24-003-D
HK$2,013.44
單位
Liquid Level Switch Threaded Mount NPN Stainless Steel 316L - - -40°C +125°C - 30V 7.5 mA 100bar - 7.5 mA
RS庫存編號 377-9822
製造零件編號VC5510PNOPT
HK$1,007.76
單位
Capacitance - PNP ABS, Polycarbonate 1.5m - 0°C +50°C - 30V 100 mA - - -
RS庫存編號 193-6797
製造零件編號POS287411
HK$2,431.44
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Liquid Level Switch Threaded Mount NPN Stainless Steel 304 - - -25°C +140°C - 30V 25 mA 80bar - 25 mA
RS庫存編號 122-8416
製造零件編號090-0024
HK$1,082.76
單位
Level Switch Side - Brass 1m - -40°C +100°C - - - 16bar - -
RS庫存編號 613-3522
製造零件編號SG51.XXSGATPV
BrandVega
HK$2,189.99
單位
Tuning Fork Horizontal PNP Stainless Steel - - -40°C +100°C - - 250 mA 64bar - -