24-08-2016, 11:41 AM
Level Sensors Information
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Level sensors are used to detect liquid or powder levels, or interfaces between liquids. They are an important part of a fluid system because the position and displacement of an object or media is critical to know in many applications. The substance to be measured could be inside a container or in its natural form such as a lake or river. A sensor is able to detect a change and communicate that change with a user. Level sensors are generally designed for a specific application, rather than general application.
There are two basic level-measurement types, point level and continuous level sensors. Below is a video which explains each measurement.
Point level sensors or multi-point sensors mark a specific level and communicate to the user if the media is above or below that level. They are used generally as a high alarm or switch. These level sensors can also be integrated in a single device to add a low alarm, or to serve as a stepped version of a continuous level.
Continuous level sensors measure liquid or dry material levels within a specified range and provide outputs which continuously indicate the level. They are more sophisticated devices than point level sensors because they measure over a range of levels instead of at one point to let the user know the exact amount of a substance. This produces an analog output that directly correlates to the fluid level in the container.
Level Sensor Devices
There are three major device classifications for level sensors:
Sensor-only devices provide outputs for processors, controllers, or data acquisition systems; however, they do not have a display or user interface. Typically, sensor-only devices are used in applications that require a switch.
Level sensor systems are simple instruments or gauges. These level sensors provide more capabilities than sensor-only (transducer) devices, and may include a display and/or user interface. Generally, level sensor systems are designed for applications that require a simple gauge, a locally-programmable (stand-alone) unit, or a controller/totalizer.
Sensor transmitters are designed to transmit data from the sensor via a two-wire current loop. The loop has an external power supply, and the transmitter acts as a variable resistor with respect to its input signal.
Product Selection
There are several important specifications to consider when selecting a level sensor. These include: the media you will be measuring, contact or non-contact measurement, type of level measurement technology, temperature and pressure ranges of the system, and output needs.
Contact or Non-contact
Level sensors measure using contact or non-contact methods. Contact methods involve physical contact between the device and the media, while non-contact methods measure without touching the media. Non-contact methods are the best choice for servicing corrosive media.
Media
Media is the material that the sensor needs to measure. Level sensors can be responsible for measuring a wide variety of media in fluid level systems in many industries. The two general media types include liquid and dry materials.
Show all Level Sensors Manufacturers
Level sensors are used to detect liquid or powder levels, or interfaces between liquids. They are an important part of a fluid system because the position and displacement of an object or media is critical to know in many applications. The substance to be measured could be inside a container or in its natural form such as a lake or river. A sensor is able to detect a change and communicate that change with a user. Level sensors are generally designed for a specific application, rather than general application.
There are two basic level-measurement types, point level and continuous level sensors. Below is a video which explains each measurement.
Point level sensors or multi-point sensors mark a specific level and communicate to the user if the media is above or below that level. They are used generally as a high alarm or switch. These level sensors can also be integrated in a single device to add a low alarm, or to serve as a stepped version of a continuous level.
Continuous level sensors measure liquid or dry material levels within a specified range and provide outputs which continuously indicate the level. They are more sophisticated devices than point level sensors because they measure over a range of levels instead of at one point to let the user know the exact amount of a substance. This produces an analog output that directly correlates to the fluid level in the container.
Level Sensor Devices
There are three major device classifications for level sensors:
Sensor-only devices provide outputs for processors, controllers, or data acquisition systems; however, they do not have a display or user interface. Typically, sensor-only devices are used in applications that require a switch.
Level sensor systems are simple instruments or gauges. These level sensors provide more capabilities than sensor-only (transducer) devices, and may include a display and/or user interface. Generally, level sensor systems are designed for applications that require a simple gauge, a locally-programmable (stand-alone) unit, or a controller/totalizer.
Sensor transmitters are designed to transmit data from the sensor via a two-wire current loop. The loop has an external power supply, and the transmitter acts as a variable resistor with respect to its input signal.
Product Selection
There are several important specifications to consider when selecting a level sensor. These include: the media you will be measuring, contact or non-contact measurement, type of level measurement technology, temperature and pressure ranges of the system, and output needs.
Contact or Non-contact
Level sensors measure using contact or non-contact methods. Contact methods involve physical contact between the device and the media, while non-contact methods measure without touching the media. Non-contact methods are the best choice for servicing corrosive media.
Media
Media is the material that the sensor needs to measure. Level sensors can be responsible for measuring a wide variety of media in fluid level systems in many industries. The two general media types include liquid and dry materials.