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 906-8121
製造零件編號143570
HK$1,101.74
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 906-8125
製造零件編號143585
HK$1,144.11
單位
Level Switch Horizontal, Vertical NO Polysulfone 14in -17.8°C +80°C - 28V 40 mA 150psi - 18 mA -
RS庫存編號 122-8434
製造零件編號232181
HK$1,527.16
單位
Electro Optic Vertical/Horizontal NC Brass 6in -40°C +110°C - 12V - 17bar - 10 mA -
RS庫存編號 122-8419
製造零件編號010-3462
HK$3,206.40
單位
Level Switch Side SPST NO Stainless Steel 1m -40°C +150°C - - - 35bar - - -
RS庫存編號 616-3006
製造零件編號208998
HK$339.48
單位
Electro Optic Horizontal, Vertical - Polyethersulfone - -40°C +125°C - - 18 mA 250psi - - -
RS庫存編號 906-8165
製造零件編號160950
HK$506.11
單位
Level Switch Horizontal SPST Zinc Alloy 24in -40°C +121°C - - - 100psi - - -
RS庫存編號 616-2996
製造零件編號208997
HK$327.88
單位
Electro Optic Horizontal, Vertical - Polyethersulfone 150mm -40°C +125°C - - 18 mA 250psi - - -
RS庫存編號 906-8042
製造零件編號01950
HK$896.91
單位
Level Switch Vertical SPST NO Stainless Steel 24in -40°C +149°C - - - 750psi - - -
RS庫存編號 907-3934
製造零件編號79990
HK$1,126.39
單位
Level Switch Vertical SPST NO Stainless Steel 600mm -40°C +204.4°C - - - 100psi - - -
RS庫存編號 906-8128
製造零件編號142700
HK$1,101.74
單位
Level Switch Horizontal, Vertical NO Polysulfone 14in -17.8°C +80°C - 28V 40 mA 150psi - 18 mA -
RS庫存編號 907-3868
製造零件編號43760
HK$1,500.66
單位
Level Switch Vertical SPST NC Stainless Steel 1.8m -40°C +60°C - - - - - - -
RS庫存編號 616-3028
製造零件編號208995
HK$327.90
單位
Electro Optic Horizontal, Vertical - Polyethersulfone - -40°C +125°C - - 18 mA 250psi - - -
RS庫存編號 122-8428
製造零件編號232175
HK$1,527.16
單位
Electro Optic Vertical/Horizontal NO Brass 6in -40°C +110°C - 5V - 17bar - 4 mA -
RS庫存編號 122-8417
製造零件編號010-3463
HK$2,236.87
單位
Level Switch Horizontal SPDT Brass - -40°C +80°C - - - 10bar - - -
RS庫存編號 907-3937
製造零件編號79999
HK$1,332.46
單位
Level Switch Vertical SPST NO Stainless Steel 600mm -40°C +249°C - - - 750psi - - -
RS庫存編號 122-8429
製造零件編號232176
HK$1,527.16
單位
Electro Optic Vertical/Horizontal NC Brass 6in -40°C +110°C - 5V - 17bar - 4 mA -
RS庫存編號 122-8418
製造零件編號010-3464
HK$3,243.15
單位
Level Switch Horizontal SPDT Stainless Steel - -40°C +150°C - - - 60bar - - -
RS庫存編號 906-8018
製造零件編號01755
HK$845.35
單位
Level Switch Vertical SPST NO Stainless Steel 24in -40°C +148.9°C - - - 275psi - - -
RS庫存編號 906-8147
製造零件編號155660
HK$655.06
單位
Level Switch Horizontal SPST Zinc Alloy 24in -40°C +121°C - - - 100psi - - -
RS庫存編號 616-3012
製造零件編號208996
HK$384.03
單位
Electro Optic Horizontal, Vertical - Polyethersulfone - -40°C +125°C - - 18 mA 250psi - - -