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 794-3437
製造零件編號2120D1AV1NAAA0000
BrandRosemount
HK$2,813.65
單位
Fork Level Switch Side or Top Mount Relay Glass Filled Nylon - - -40°C +150°C - - 500 mA 100bar Non Asbestos Sheet -
RS庫存編號 889-1400
製造零件編號FT10-1305
BrandFlowline
HK$2,089.80
單位
Liquid and Gas Flow Switch Cable - Polypropylene 3m - -40°C +60°C - 36V - 150psi Viton 1 A
RS庫存編號 768-1956
製造零件編號SONS61.EXXX
BrandVega
HK$6,962.40
單位
Vibrating Rod - Relay - - - - - - - 20 mA - - -
RS庫存編號 193-6760
製造零件編號LLC710D324-004
HK$493.07
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 419-4654
製造零件編號SWING61XXGBVXPRX
BrandVega
HK$4,953.73
單位
Vibrating Rod Horizontal, Vertical Relay Plastic - - -50°C +150°C - - 1 A dc, 3 A ac 64bar - -
全新
RS庫存編號 210-3163
製造零件編號226551
HK$583.93
單位
Electro-Optic M12x1-8* Direct Load Housing = Polysulfone (Contact Gems for alternative material types)Prism = PolysulfoneO-Ring = Fluorocarbon (1/4? MNPT - None)Electronics = Over-molded TPE 119.8mm - - - - - - - - -
RS庫存編號 906-8042
製造零件編號01950
HK$988.75
單位
Level Switch Vertical SPST NO Stainless Steel 24in - -40°C +149°C - - - 750psi - -
RS庫存編號 776-1608
製造零件編號072.31
BrandFinder
HK$156.04
單位
Electrode Vertical Relay Stainless Steel - - 0°C +80°C - - - - - -
RS庫存編號 616-3012
製造零件編號208996
HK$454.30
單位
Electro Optic Horizontal, Vertical - Polyethersulfone - - -40°C +125°C - - 18 mA 250psi - -
RS庫存編號 175-5068
製造零件編號UP56-214178
BrandSick
HK$8,019.73
單位
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庫存編號 193-6761
製造零件編號LLC710D3L24-004
HK$493.07
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 208-5497
製造零件編號SOLIBA5M
BrandATMI
HK$1,474.73
單位
Tilt Level Switch Cable Mount SPDT Copolymer Polypropylene 5m - - - - - - - - -
RS庫存編號 419-4660
製造零件編號SWING61XXGAVXPRX
BrandVega
HK$4,994.51
單位
Vibrating Fork Horizontal, Vertical Relay Plastic - - -50°C +150°C - - 1 A dc, 3 A ac 64bar - -
RS庫存編號 892-9378
製造零件編號2160XD8ES1NNBA00001I1WA3WK1M5
BrandRosemount
HK$18,760.91
單位
Fork Level Detector Side or Top Mount Relay Aluminium - - -70°C +260°C - - - 100bar Non Asbestos Carbon Fibre -
RS庫存編號 193-6731
製造零件編號LLC101000
HK$432.50
單位
Liquid Level Switch Threaded Mount Transistor Polysulfone - - -25°C +80°C - 15.4V 2.5 mA 7bar - 2.5 mA
RS庫存編號 193-6747
製造零件編號LLC700D3SH
HK$308.93
單位
Liquid Level Switch Threaded Mount Transistor Polysulfone - - -25°C +80°C - 15.4V 2.5 mA 7bar - 2.5 mA
RS庫存編號 177-9142
製造零件編號9038CG36Z20
HK$3,982.89
單位
Mechanical Alternator Screw In 4 NC DPST Painted Cold-Rolled Steel - - -22°F +220°F 230 (Single Phase) V, 475 (3 Phase) V 230V - - - -
RS庫存編號 616-3028
製造零件編號208995
HK$454.30
單位
Electro Optic Horizontal, Vertical - Polyethersulfone - - -40°C +125°C - - 18 mA 250psi - -
RS庫存編號 205-1301
製造零件編號14241092
BrandWIKA
HK$2,686.69
單位
Optoelectronic Panel Mount PNP Stainless Steel - - - - - - - - - -
RS庫存編號 206-7064
製造零件編號CP-222 3BH
BrandVega
HK$1,696.07
單位
Impedance Switch 1" G/BSP Thread PNP Stainless Steel - IO-LINK -40°C 115°C - 35V - 25bar Klingersil -