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 768-2066
製造零件編號MET381.XX
BrandVega
HK$4,906.47
單位
Sensor Rail Mounting, Wall Mount Relay Plastic - - -20°C +60°C - - 20 mA - - -
全新
RS庫存編號 206-7074
製造零件編號RA - 222 22H
BrandVega
HK$6,546.63
單位
Ultrasonic/Radar G1.5 Thread HART PVDF 5m - -40°C +80°C - 35V 20 mA 3bar FKM -
RS庫存編號 780-0387
製造零件編號CW1
BrandCynergy3
HK$29.69
單位
Weight - - Polypropylene - - -20°C - - - - 100bar - -
RS庫存編號 794-3395
製造零件編號LFP0500-G1NMB
BrandSick
HK$8,708.76
單位
Sensor Vertical 0-10 V, 4-20 mA Stainless Steel 500mm IO-LINK -20°C +150°C - - 100 mA 16bar PEEK -
RS庫存編號 193-6785
製造零件編號LLG710D3L24-004-D
HK$1,957.01
單位
Liquid Level Switch Threaded Mount PNP Stainless Steel 316L - - -40°C +125°C - 30V 7.5 mA 100bar - 7.5 mA
RS庫存編號 193-6734
製造零件編號LLC105000
HK$400.40
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 193-6746
製造零件編號LLC610D3SH
HK$396.96
單位
Liquid Level Switch Threaded Mount Transistor Polysulfone - - -40°C +125°C - 15.4V 2.5 mA 7bar - 2.5 mA
RS庫存編號 776-1610
製造零件編號072.53
BrandFinder
HK$348.00
單位
- - - - - - - - - - - - - -
RS庫存編號 776-1601
製造零件編號072.02.06
BrandFinder
HK$127.88
單位
Electrode Vertical Relay Stainless Steel 6m - 0°C +100°C - - - - - -
RS庫存編號 869-7671
製造零件編號ILLS-G1000-D-015
BrandCynergy3
HK$3,565.19
單位
Pressure Cable 0.5-4.5V Stainless Steel 15m - -20°C +60°C - 32V - 50bar - -
RS庫存編號 857-3168
製造零件編號CLD2EA1CM24
HK$2,007.73
單位
Conductive DIN Rail DPDT Relay ABS 100m - -20°C +50°C - - 8 A - - -
RS庫存編號 780-0330
製造零件編號OLS210D3L24-003
BrandCynergy3
HK$717.16
單位
Optical Sensor Chassis Mount Transistor Polysulfone 250mm - -40°C +125°C - - 1 A 7bar - -
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 - -
全新
RS庫存編號 210-0729
製造零件編號PL20S-11111.111013.G07020010000
BrandBaumer
HK$2,032.01
單位
Adaptive Trigger Threaded PNP Stainless Steel - - - - - - - - - -
RS庫存編號 377-9800
製造零件編號VC5510NNOPT
HK$1,038.65
單位
Capacitance - NPN ABS, Polycarbonate 1.5m - 0°C +50°C - 30V 100 mA - - -
RS庫存編號 387-0341
製造零件編號CAP98XPXD
BrandVega
HK$3,625.19
單位
Capacitance Horizontal, Vertical Relay Polypropylene - - -30°C +80°C - - 1 A dc, 3 A ac - - -
RS庫存編號 892-9378
製造零件編號2160XD8ES1NNBA00001I1WA3WK1M5
HK$18,007.29
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 193-6780
製造零件編號LLG210D324-004-D
HK$1,957.01
單位
Liquid Level Switch Threaded Mount PNP Stainless Steel 316L - - -40°C +125°C - 30V 7.5 mA 100bar - 7.5 mA
RS庫存編號 794-3383
製造零件編號LFP1000-A4NMB
BrandSick
HK$4,488.26
單位
Guided Radar Vertical 0-10 V, 4-20 mA PBT - IO-LINK -20°C +100°C - - 100 mA 10bar PTFE -
RS庫存編號 869-7683
製造零件編號ILSE-G0250-5
BrandCynergy3
HK$1,844.12
單位
Pressure Chassis Mount 4-20mA Stainless Steel - - - - - 32V 28 mA 20bar - -