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 193-6785
製造零件編號LLG710D3L24-004-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 377-9816
製造零件編號VC5510PNOP
TWD3,482.00
單位
Capacitance Switch Chassis Mount PNP ABS/Polycarbonate 1.5m - 0°C +50°C - 30V 100 mA - - -
全新
RS庫存編號 210-3153
製造零件編號226541
TWD2,138.00
單位
Electro-Optic 1/2?- 20UNF-2B* Direct Load Housing = Polysulfone (Contact Gems for alternative material types)Prism = PolysulfoneO-Ring = Fluorocarbon (1/4? MNPT - None)Electronics = Over-molded TPE 119.8mm - - - - - - - - -
RS庫存編號 857-3212
製造零件編號VPC310
TWD6,503.00
單位
Conductive Chassis Mount Relay PVC 2m - 0°C +60°C - - - 2bar - -
RS庫存編號 889-1201
製造零件編號LU27-41
BrandFlowline
TWD24,318.00
單位
Ultrasonic Level Transmitter Vertical - Polycarbonate 4.6m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS庫存編號 889-1194
製造零件編號LU27-00
BrandFlowline
TWD20,651.00
單位
Ultrasonic Level Transmitter Vertical - Polycarbonate 3m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS庫存編號 193-6791
製造零件編號LLG610D324-003-D
TWD7,914.00
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 768-2006
製造零件編號WAVES61.EXX2RD
BrandVega
TWD21,529.00
單位
Vibrating Level Switch Cable Relay - - - -40°C +150°C - - 1 A dc, 3 A ac 1.1bar - -
RS庫存編號 124-0133
製造零件編號LR15-0010-20
BrandFlowline
TWD115,101.00
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 892-9356
製造零件編號2130LA2MS1NNBA00001NA
BrandRosemount
TWD16,694.00
單位
Fork Level Switch Side or Top Mount Direct Load Aluminium - - -40°C +180°C - - 500 mA 100bar - -
RS庫存編號 183-7323
製造零件編號GRF18S-F234LV
BrandSick
TWD3,800.00
單位
Optical Point Level Switch G1/2 Thread NO, PNP Stainless Steel - - -25°C +55°C - 30V - 16bar - ≤30 mA
全新
RS庫存編號 206-7069
製造零件編號RA - 222 22J
BrandVega
TWD18,360.00
單位
Ultrasonic/Radar G1.5 Thread HART PVDF 8m - -40°C +80°C - 35V 20 mA 3bar FKM -
RS庫存編號 175-5065
製造零件編號PFT-FRBX25SF1OSSAMSSZ
BrandSick
TWD16,800.00
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 - -
RS庫存編號 889-1453
製造零件編號LD31-S131
BrandFlowline
TWD35,147.00
單位
Pressure Level Transmitter Horizontal, Vertical 2 Wire Buna-N, Stainless Steel 316, Stainless Steel 316L 18.3m - -18°C +66°C - 30V 20 mA 20psi - -
全新
RS庫存編號 208-5487
製造零件編號PIEZOST0-6mh20-10M
BrandATMI
TWD17,029.00
單位
Piezometric Cable Mount - Stainless Steel 316L 10m - - - - - - - - -
RS庫存編號 780-0387
製造零件編號CW1
BrandCynergy3
TWD112.00
單位
Weight - - Polypropylene - - -20°C - - - - 100bar - -
RS庫存編號 189-2702
製造零件編號LBFS-01K21.0
BrandBaumer
TWD7,747.00
單位
Level Switch G 1/2" Fitting PNP Stainless Steel - - -40°C +85°C - 30V 50 mA 100bar - 20 mA
RS庫存編號 193-6755
製造零件編號LLC610D324-004
TWD1,805.00
單位
Liquid Level Switch Threaded Mount PNP Polysulfone - - -40°C +125°C - 30V 7.5 mA 7bar - 7.5 mA
RS庫存編號 780-0327
製造零件編號OLS510D3L
BrandCynergy3
TWD3,556.00
單位
Optical Sensor Chassis Mount Transistor Polysulfone 250mm - -40°C +125°C - - 1 A 20bar - -
RS庫存編號 513-2449
製造零件編號7ML5430-2BE10
BrandSiemens
TWD42,891.00
單位
Radar - - PBT - - -40°C +80°C - - 20 mA 3bar - -