If one needs Hall Effect sensors that respond well to a wider range of negative or positive magnetic fields, they need to get Linear Hall Effect sensors. These sensors are designed to be sensitive to the specific temperature range under which they operate. The sensors are also practically resistant to external interference that might pose any optical or even mechanical interference such as dirt, vibration or even moisture from the environment.
There are several applications of the sensors which include current sensing just like the other Hall Effect sensors, power sensing, biased sensing applications, proximity sensing, current trip-point detection, liquid – level sensing and temperature sensing among many others. Almost all the Linear Hall Effect sensors can be denoted as “ratiometric” which means that their quiescent output, which is ordinarily half the supply voltage and their sensitivity is proportional to the supply.
Linear sensors often have an amplifier to have an easier user interface. Unlike the basic sensors, the linear sensors operate in a wider range of voltage and tend to be more stable in noisy environments. These qualities enable the sensors to be ideal for industrial uses mostly. However, they are not linear to the magnetic field of the conductor and for that reason if the user desires a more precise measurement, calibration is required. The Linear Hall Effect sensor converts stored energy in a magnetic field into voltage that is proportional to the input.
There are several companies that manufacture these linear sensors, and to choose one over the other depends on ones choice. However, it is best to investigate and know the reviews of a particular company from the consumers so as to understand just what you would be buying. Most of these reviews can be found from several online websites where such sensors are sold or marketed. The applications of linear sensors are pretty much similar to the applications of the basic Hall Effect sensors with the only difference being that the linear sensors offer a more precise measurement.
If you require such precision, this is the right kind of sensors to use. There are several kinds of linear sensors such as linear displacement sensors and Hall Effect contactless linear sensors. The first kind is commonly used in the motor industry, and it is relatively compact in length. Any of these sensors are great for sensing current that is from a low range up to a thousand or more amperes accurately. However, because the range of the linear sensor is quite limited, the user is therefore needed to calibrate it in a way that the field strength of the current to be measured is right within the sensors range.
In several applications of the sensors, they will be required to be used together with permanent magnets. High field strength magnets are particularly needed to have optimum results. The linear sensors can also be used to detect the absence or presence of ferrous metals which is achieved by bonding a biasing magnet on to the sensor that is going to be used.
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