Liquid level measurement is one of several common types of level measurement in many industries. Usually, level measurement in this certain field is detected with two different sensor, point level measurement and continuous level sensor. For liquid level measurement, the applied sensor in controlling the level of the liquid is continuous level one.
As the applied sensor used in liquid level measurement, continuous level measurements is more sophisticated. However, it provides higher quality level monitoring of an entire system. This certain sensor works great in measuring the level of any kind of liquid within a range instead of at a one point. This system then produces an analog output that directly connects to the level in the vessel.
However, you can also find several other selections of liquid level measurement variation. The first variety will be non contact ultrasonic sensor that works well in incorporating analog signal processor, microprocessor, binary coded decimal (BCD) range switches, as well as output driver circuit. In this certain system, the sensor works well to detect any echoes from the surface and routes them back to the microprocessor. These detected echoes then are used as digital representation of the distance between the sensor and the surface level.
With the continuous sensor used in this liquid level measurement, the average value is converted by the microprocessor to 4 to 20 mA signal linear with the liquid level. When the echo from the liquid level does not return to the sensor within 8 seconds, the output signal from the system will be dropped to 4 mA or below, and it will be an indication that indicates a low-level condition or empty pipe.
The next variation of liquid level measurement is contact ultrasonic sensors. This certain technology is completed with great ability to measures liquid level at a certain point. This system is completed with field-mounted sensor and integral solid state amplifier. Besides, this certain sensor does not have any moving parts and does not require any calibration. Usually, they are also set with terminal blocks in order to allow connection of a power source and external control devices.
Usually, this certain used for liquid level measurement in any vessels or pipes because it is designed automatically operate pumps, solenoid valves, as well as high/low alarms. This system will be perfect and compatible for almost all types of liquids. It will not be affected with any coatings, clinging droplets, foam, and vapor. However, some problem might occur when highly aerated liquids and liquids viscous are clogging the sensor gap.
As well as the ultrasonic sensors, you can also find another useful liquid level measurement, capacitance sensors. This certain sensor will be perfect to handle either point or continuous level measurement. A probe is added in this sensor system in order to easier you monitoring liquid level changes in the tank. Besides, it is also very useful in electronically breaking in the output to capacitive and resistive values. Those outputs then are converted to analog signals.
Since liquid level measurement is very important, it will be better to know well the most appropriate types of sensor and system that will be appropriate for your industry. The better liquid level measurement system you have, the more easiness you will get.
