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 857-7781
製造零件編號VP02E
HK$1,334.35
單位
Optical Sensor Cable NPN Polysulfone 2m - -20°C +80°C - - 200 mA 10bar - -
RS庫存編號 183-7322
製造零件編號GRF18S-P234LV
BrandSick
HK$815.48
單位
Optical Point Level Switch G1/2 Thread NC, PNP Stainless Steel - - -25°C +55°C - 30V - 16bar - ≤30 mA
全新
RS庫存編號 213-3284
製造零件編號LFV200-XXHCLTPM
BrandSick
HK$3,450.06
單位
Vibrating Level Switch Triclamp 1", Vertical/Horizontal PNP NO/NC PEI, Stainless Steel - - -40°C +150°C - 35V 250 mA 64bar - 250 mA
全新
RS庫存編號 213-3287
製造零件編號LFV200-XXSGATPVL
BrandSick
HK$2,670.05
單位
Vibrating Level Switch G1 Thread, Vertical/Horizontal PNP NO/NC PEI, Stainless Steel - - -40°C +100°C - 35V 250 mA 64bar - 250 mA
RS庫存編號 193-6800
製造零件編號POS287414
HK$2,431.44
單位
Liquid Level Switch Threaded Mount PNP Stainless Steel 304 - - -25°C +140°C - 30V 25 mA 80bar - 25 mA
全新
RS庫存編號 213-3290
製造零件編號LFV200-XXSGBTPML
BrandSick
HK$2,450.04
單位
Vibrating Level Switch G3/4 Thread, Vertical/Horizontal PNP NO/NC PEI, Stainless Steel - - -40°C +100°C - 35V 250 mA 64bar - 250 mA
RS庫存編號 188-5257
製造零件編號VN1
HK$867.85
單位
Conductive Cable - Nylon 6 2m - 0°C +90°C - - - 10bar - -
RS庫存編號 193-6763
製造零件編號LLG210D3L24-004
HK$1,126.76
單位
Liquid Level Switch Threaded Mount PNP Stainless Steel 316L - - -40°C +125°C - 30V 7.5 mA 100bar - 7.5 mA
全新
RS庫存編號 213-3278
製造零件編號LFP0300-G1NMB
BrandSick
HK$8,943.18
單位
Guided Radar G3/4 Thread, Vertical - Stainless Steel - IO-LINK -20°C +150°C - 30V 100 mA 16bar - 100 mA
全新
RS庫存編號 210-0728
製造零件編號PL20H-11111.111012.A03021030030
BrandBaumer
HK$2,032.01
單位
Adaptive Trigger Threaded PNP Stainless Steel - - - - - - - - - -
RS庫存編號 122-8417
製造零件編號010-3463
HK$2,196.56
單位
Level Switch Horizontal SPDT Brass - - -40°C +80°C - - - 10bar - -
RS庫存編號 780-0302
製造零件編號OLS500D3
BrandCynergy3
HK$350.08
單位
Optical Sensor Chassis Mount Transistor Polysulfone 250mm - -25°C +80°C - - 100 mA 20bar - -
全新
RS庫存編號 210-7472
製造零件編號7MF1572-1FA10
BrandSiemens
HK$5,211.89
單位
Hydrostatic Level Transmitter Cable 2 Wire Stainless Steel - - - - - - - - - -
RS庫存編號 193-6779
製造零件編號LLG810D3L24-003
HK$1,375.84
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 193-6783
製造零件編號LLG610D3L24-004-D
HK$1,957.01
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 193-6798
製造零件編號POS287412
HK$2,345.20
單位
Liquid Level Switch Threaded Mount NPN Stainless Steel 304 - - -25°C +140°C - 30V 25 mA 80bar - 25 mA
全新
RS庫存編號 206-7078
製造零件編號GB101089056
BrandVega
HK$1,720.96
單位
Tuning Fork G3/4 Thread PNP Stainless Steel - IO-LINK -40°C +100°C - 35V - 64bar - -
RS庫存編號 794-3424
製造零件編號2120D1AT1NAAM0150
HK$4,876.14
單位
Fork Level Switch Side or Top Mount Direct Load Glass Filled Nylon - - -40°C +150°C - - 500 mA 100bar Non Asbestos Sheet -
全新
RS庫存編號 208-5502
製造零件編號SOLIBAMXL
BrandATMI
HK$3,283.43
單位
Level Detector Panel Mount SPST NO/NC Aluminium - - - - - - - - - -
全新
RS庫存編號 206-7069
製造零件編號RA - 222 22J
BrandVega
HK$4,814.04
單位
Ultrasonic/Radar G1.5 Thread HART PVDF 8m - -40°C +80°C - 35V 20 mA 3bar FKM -