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 377-9872
製造零件編號VN2
HK$483.57
單位
- - - - - - - - - - - - - -
RS庫存編號 804-4146
製造零件編號7ML1123-0CA50
BrandSiemens
HK$12,258.19
單位
Ultrasonic - - - - - -40°C +95°C - - - - - -
RS庫存編號 889-1356
製造零件編號DL14-11
BrandFlowline
HK$4,437.80
單位
- - - - - - - - - - - - - -
RS庫存編號 193-6778
製造零件編號LLG810D324-003
HK$1,327.04
單位
Liquid Level Switch Threaded Mount NPN Stainless Steel 316L - - -40°C +125°C - 30V 7.5 mA 600bar - 7.5 mA
RS庫存編號 182-5612
製造零件編號PS69.AXBXXCHXKMXXX
BrandVega
HK$25,586.26
單位
Level Sensor Slip on Flange or Bracket 2 Wire, 4 to 20 mA PTB VALOX - - -40°C +80°C 253V 35V 22 mA 2bar - 4 → 20 mA
RS庫存編號 889-1194
製造零件編號LU27-00
BrandFlowline
HK$5,327.15
單位
Ultrasonic Level Transmitter Vertical - Polycarbonate 3m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS庫存編號 419-4660
製造零件編號SWING61XXGAVXPRX
BrandVega
HK$4,738.71
單位
- - - - - - - - - - - - - -
RS庫存編號 906-8018
製造零件編號01755
HK$811.94
單位
Level Switch Vertical SPST NO Stainless Steel 24in - -40°C +148.9°C - - - 275psi - -
RS庫存編號 144-2576
製造零件編號7ML5202-0FA0
BrandSiemens
HK$9,712.68
單位
Ultrasonic Clamp Mount - PBT - - -40°C +60°C - 30V - - - 25 mA
RS庫存編號 193-6744
製造零件編號LLC510D3
HK$331.76
單位
Liquid Level Switch Threaded Mount Transistor Polysulfone - - -40°C +125°C - 15.4V 2.5 mA 20bar - 2.5 mA
RS庫存編號 186-0287
製造零件編號7ML5110-1GF07-4AF3
BrandSiemens
HK$9,754.41
單位
Ultrasonic - - PBT, PC - Hart -40°C +80°C - 30V - 0.5bar - -
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 776-1610
製造零件編號072.53
BrandFinder
HK$367.62
單位
- - - - - - - - - - - - - -
RS庫存編號 193-6731
製造零件編號LLC101000
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 780-0330
製造零件編號OLS210D3L24-003
BrandCynergy3
HK$745.20
單位
Optical Sensor Chassis Mount Transistor Polysulfone 250mm - -40°C +125°C - - 1 A 7bar - -
RS庫存編號 869-7725
製造零件編號ILTS-G1000-015
BrandCynergy3
HK$3,960.87
單位
Pressure Cable - Stainless Steel 15m - -20°C +60°C - 32V 28 mA 50bar - -
RS庫存編號 122-8433
製造零件編號232180
HK$1,491.78
單位
Electro Optic Vertical/Horizontal NC Brass 6in - -40°C +110°C - 5V - 17bar - 4 mA
RS庫存編號 889-1157
製造零件編號LR25-0310-40
BrandFlowline
HK$30,159.27
單位
Pulse Radar Level Transmitter Vertical - Aluminium - - -40°C +130°C - 26V 20 mA 580psi Silicone -
RS庫存編號 124-0133
製造零件編號LR15-0010-20
BrandFlowline
HK$29,832.42
單位
Pulse Radar Level Transmitter Flange Mount - Aluminium - - -60°C +150°C - 26V 20 mA 10.3bar Silicone 22.5 mA
RS庫存編號 768-1962
製造零件編號SONS61.EEEA
BrandVega
HK$10,281.31
單位
Vibrating Rod - Relay - - - - - - - 20 mA - - -