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 354-290
製造零件編號PS31SUS3041000MM
BrandOmron
TWD1,087.00
整套:1 個
Kit(s)
Electrode Chassis Mount - Phenol Resin, Stainless Steel - - - +70°C - - - - - -
RS庫存編號 124-0142
製造零件編號LO10-1305
BrandFlowline
TWD5,956.00
單位
Flowline Detection Switch Vertical NO/NC PP 3m - -40°C +80°C - 36V - 10bar FKM 25 mA
RS庫存編號 124-0126
製造零件編號LU80-5101
BrandFlowline
TWD22,331.00
單位
Ultrasonic Level Transmitter Vertical - PC - - -40°C +71°C - 28V 20 mA 2bar FKM -
RS庫存編號 892-9763
製造零件編號03100-1003-0002
BrandRosemount
TWD3,746.00
單位
BSP Bracket Flange Mount - - - - - - - - - - - -
RS庫存編號 740-6442
製造零件編號LMT100
TWD7,660.00
單位
Electronic Flush Mount PNP NO/NC FPM, PA12, PEEK, Stainless Steel - - 0°C +60°C - - 50 mA 16bar PEEK -
RS庫存編號 892-9757
製造零件編號3101LP3FSCNA
TWD28,810.00
單位
Level Transmitter Top Mount 4-20mA Glass Filled Nylon - - -20°C +70°C - 30V 21.75 mA 3bar - -
RS庫存編號 407-2368
製造零件編號LA9RM201
TWD3,068.00
單位
Electrode Cable Suspension - - - - - +100°C - - - - - -
RS庫存編號 906-8121
製造零件編號143570
TWD2,621.00
單位
Level Switch Horizontal, Vertical NC Polysulfone 14in - -17.8°C +80°C - 28V 40 mA 150psi - 18 mA
RS庫存編號 387-0341
製造零件編號CAP98XPXD
BrandVega
TWD13,987.00
單位
Capacitance Horizontal, Vertical Relay Polypropylene - - -30°C +80°C - - 1 A dc, 3 A ac - - -
RS庫存編號 204-6733
製造零件編號003H2
TWD10,320.00
單位
Gap Sensor Level Alarm Switch Horizontal, Vertical FET Polyphenylene Sulfide 3m - -40°C +105°C - - 100 mA 5bar - -
RS庫存編號 193-6774
製造零件編號LLG610D324-003
TWD4,297.00
單位
Liquid Level Switch Threaded Mount NPN Stainless Steel 316L - - -40°C +125°C - 30V 7.5 mA 100bar - 7.5 mA
RS庫存編號 193-6780
製造零件編號LLG210D324-004-D
TWD7,464.00
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 193-6748
製造零件編號LLC710D3SH
TWD1,312.00
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 468-3435
製造零件編號SN62XXAGHKMX
BrandVega
TWD46,734.00
單位
Ultrasonic - - Plastic - - -40°C +80°C - - 20 mA 2bar - -
RS庫存編號 513-2427
製造零件編號7ML5610-0BD20
BrandSiemens
TWD8,719.00
單位
Capacitance - Relay Polyphenylene Sulfide - - -40°C +85°C - - 20 mA 10bar - -
RS庫存編號 354-335
製造零件編號F0301SUS201ELECTRODE
BrandOmron
TWD707.00
單位
Electrode Chassis Mount - Stainless Steel - - - +70°C - - - - - -
RS庫存編號 193-6775
製造零件編號LLG610D3L24-003
TWD4,297.00
單位
Liquid Level Switch Threaded Mount NPN Stainless Steel 316L - - -40°C +125°C - 30V 7.5 mA 100bar - 7.5 mA
RS庫存編號 193-6781
製造零件編號LLG210D3L24-004-D
TWD7,420.00
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 377-9800
製造零件編號VC5510NNOPT
TWD3,482.00
單位
Capacitance - NPN ABS, Polycarbonate 1.5m - 0°C +50°C - 30V 100 mA - - -
RS庫存編號 193-6749
製造零件編號LLC210D324-003
TWD1,805.00
單位
Liquid Level Switch Threaded Mount NPN Polysulfone - - -40°C +125°C - 30V 7.5 mA 7bar - 7.5 mA