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 Minimum Operating Temperature Maximum Operating Temperature Maximum AC Voltage Maximum DC Voltage Maximum Current Maximum Pressure Gasket Material Current Rating Hazardous Area Certification
RS庫存編號 377-9888
製造零件編號VN3
HK$569.50
單位
Conductive Cable - Nylon 6 2m 0°C +90°C - - - 10bar - - -
RS庫存編號 794-3418
製造零件編號211001A1NA
BrandRosemount
HK$1,489.27
單位
Fork Level Switch Side or Top Mount Direct Load Stainless Steel - -40°C +150°C - - 500 mA 100bar - - -
RS庫存編號 804-4140
製造零件編號7ML1106-2BA200A
BrandSiemens
HK$5,147.39
單位
Ultrasonic - - - 10m -20°C +65°C - - - - - - -
RS庫存編號 183-7323
製造零件編號GRF18S-F234LV
BrandSick
HK$823.90
單位
Level Sensor Threaded - Stainless Steel - -25°C +55°C - 30V - 16bar - 30 mA -
RS庫存編號 869-7665
製造零件編號ILLS-G0250-D-005
BrandCynergy3
HK$2,228.52
單位
Pressure Cable 0.5-4.5V Stainless Steel 5m -20°C +60°C - 32V - 20bar - - -
RS庫存編號 907-3883
製造零件編號46999
HK$1,353.51
單位
Level Switch Vertical SPST NO Polysulfone 1.8m -40°C +48.9°C 240V - - 50psi - - -
RS庫存編號 869-7683
製造零件編號ILSE-G0250-5
BrandCynergy3
HK$1,843.65
單位
Pressure Chassis Mount 4-20mA Stainless Steel - - - - 32V 28 mA 20bar - - -
RS庫存編號 794-3421
製造零件編號2120D1AT1NAAA0000
BrandRosemount
HK$3,319.25
單位
Fork Level Switch Side or Top Mount Direct Load Glass Filled Nylon - -40°C +150°C - - 500 mA 100bar Non Asbestos Sheet - -
RS庫存編號 768-1971
製造零件編號SONS62.EXXX
BrandVega
HK$6,999.27
單位
Vibrating Rod Chassis Mount - ABS - -40°C +80°C - - 20 mA - - - -
RS庫存編號 498-7349
製造零件編號VB61.XXAGDRKMX
BrandVega
HK$6,842.67
單位
Vibrating Rod Free Relay Plastic - -50°C +150°C - - 1 A dc, 3 A ac 16bar - - -
RS庫存編號 182-5618
製造零件編號PS64.ACTTCAHXKMXXX
BrandVega
HK$32,733.84
單位
Level Sensor 1.5 BSP/G Thread 2 Wire, 4 to 20 mA PTB VALOX - -40°C +130°C - 35V 22 mA 20bar - 4 → 20 mA -
RS庫存編號 175-5068
製造零件編號UP56-214178
BrandSick
HK$7,537.37
單位
Level Sensor PCB Mount - PBT, PVDF, TPU - -25°C +70°C - 30V 20 mA 6bar - - -
RS庫存編號 869-7716
製造零件編號ILTS-G0500-007
BrandCynergy3
HK$5,929.00
單位
Pressure Cable - Stainless Steel 7m -20°C +60°C - 32V 28 mA 50bar - - -
RS庫存編號 869-7659
製造零件編號ILLS-G0750-5-010
BrandCynergy3
HK$3,020.34
單位
Pressure Cable 4-20mA Stainless Steel 10m -20°C +60°C - 32V 28 mA 50bar - - -
RS庫存編號 869-7725
製造零件編號ILTS-G1000-015
BrandCynergy3
HK$4,887.73
單位
Pressure Cable - Stainless Steel 15m -20°C +60°C - 32V 28 mA 50bar - - -
RS庫存編號 175-5066
製造零件編號PFT-FRBX40SF1OSSAMSSZ
BrandSick
HK$3,485.09
單位
Pressure Sensor Threaded 2 Wire, 4 to 20 mA Stainless Steel 1.4571 - -20°C +80°C - 30V 20 mA 0.4bar - - -
全新
RS庫存編號 189-2702
製造零件編號LBFS-01K21.0
BrandBaumer
HK$1,794.72
單位
Level Switch Bottom Mount, Side Mount, Top Mount PNP Stainless Steel 5m -40°C +85°C - 30V 50 mA 100bar - 50 mA ATEX
RS庫存編號 768-2066
製造零件編號MET381.XX
BrandVega
HK$4,731.44
單位
Sensor Rail Mounting, Wall Mount Relay Plastic - -20°C +60°C - - 20 mA - - - -
RS庫存編號 488-031
製造零件編號LK1024
HK$2,955.26
單位
- - PNP Stainless Steel/FKM/NBR/PBT/PC/PEI/PP/TPE - 0°C +60°C - - 200 mA 0.5bar - - -
RS庫存編號 746-7526
製造零件編號1SVR402902R0000
BrandABB
HK$151.00
單位
Electrode - - Steel - - - - - - - - - -