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 124-0128
製造零件編號LU83-5101
BrandFlowline
HK$7,453.36
單位
Ultrasonic Level Transmitter Vertical - PC - - -40°C +71°C - 28V 20 mA 2bar FKM -
RS庫存編號 794-3395
製造零件編號LFP0500-G1NMB
BrandSick
HK$8,608.54
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 794-3383
製造零件編號LFP1000-A4NMB
BrandSick
HK$4,272.09
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 613-3415
製造零件編號SN61.CXAGHKMX
BrandVega
HK$13,189.05
單位
Ultrasonic Vertical - Plastic - - -40°C +80°C - - 20 mA 2bar EPDM Rubber -
RS庫存編號 124-0125
製造零件編號LU28-01
BrandFlowline
HK$6,490.37
單位
Ultrasonic Level Transmitter Vertical - PC 3m - -35°C +60°C - 24V 20 mA 2bar FKM -
RS庫存編號 768-2069
製造零件編號SWINGS52.EEA7CV
BrandVega
HK$2,709.32
單位
Level Switch Chassis Mount PNP - - - - +150°C - - - - - -
RS庫存編號 124-0141
製造零件編號LZ12-1405
BrandFlowline
HK$3,230.93
單位
Vibration Level Switch Vertical NO/NC PPS 3m - -40°C +80°C - 30V - 10bar FKM 25 mA
RS庫存編號 756-4289
製造零件編號RSF88H100R
BrandCynergy3
HK$169.88
單位
Sensor Horizontal External NO/NC Polypropylene 1m - -20°C +100°C - - 1 A - - -
RS庫存編號 869-7693
製造零件編號ILSE-G0100-D
BrandCynergy3
HK$1,797.68
單位
Pressure Chassis Mount 0.5-4.5V Stainless Steel - - - - - 32V - 20bar - -
RS庫存編號 889-1236
製造零件編號LU29-41
BrandFlowline
HK$8,904.21
單位
Ultrasonic Level Transmitter Vertical - Polycarbonate 4.6m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS庫存編號 193-6750
製造零件編號LLC210D3L24-003
HK$456.46
單位
Liquid Level Switch Threaded Mount NPN Polysulfone - - -40°C +125°C - 30V 7.5 mA 7bar - 7.5 mA
RS庫存編號 193-6782
製造零件編號LLG610D324-004-D
HK$1,887.60
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 889-1191
製造零件編號LU23-41
BrandFlowline
HK$7,268.63
單位
Ultrasonic Level Transmitter Vertical - Polycarbonate 4.6m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS庫存編號 513-2449
製造零件編號7ML5430-2BE10
BrandSiemens
HK$12,035.25
單位
Radar - - PBT - - -40°C +80°C - - 20 mA 3bar - -
RS庫存編號 906-8128
製造零件編號142700
HK$1,023.37
單位
Level Switch Horizontal, Vertical NO Polysulfone 14in - -17.8°C +80°C - 28V 40 mA 150psi - 18 mA
RS庫存編號 488-037
製造零件編號LR7000
HK$2,561.87
單位
- - PNP Stainless Steel/FKM/NBR/PB/PC/PEI/TPE/PTFE - - 0°C +60°C - - 200 mA 4bar - -
RS庫存編號 137-2043
製造零件編號LR31-0021-10-01
BrandFlowline
HK$34,101.75
單位
Pulse Radar Liquid Level Transmitter Vertical, Wall Mount HART 7, 2 Wire, 4 to 20 mA Nylon, Polycarbonate (Display) 10m - -40°C +100°C - 26.4V 20 mA - - 22.5 mA
RS庫存編號 377-9894
製造零件編號VN4
HK$744.29
單位
Conductive - - Nylon 6 2m - 0°C +90°C - - - 10bar - -
RS庫存編號 144-9330
製造零件編號84800013
BrandXylem
HK$6,407.04
單位
10 Sensor Probe 1.5 m Bracket Mounted - - - - - - - - - - - -
RS庫存編號 175-5065
製造零件編號PFT-FRBX25SF1OSSAMSSZ
BrandSick
HK$3,485.09
單位
Hydrostatic Level Sensor G1 Thread 2 Wire, 4 to 20 mA Stainless Steel 1.4571 - - -20°C +80°C - 30V 20 mA 0.25bar - -