Hall Sensor FAQ - FX51D, FX51SEN, FX51A, and FX50
Last Updated: 01/23/2019
Tips and Tricks:
1. Magnetic field is not linearIts works more like a flashlight against a wall. The closer you get, the brighter, but at a faster rate than the distance [inverse square relationship]. What this means is that as a magnet gets closer to the sensor, the magnet field gets much larger than the distance. Here is a quick table of our 1/2" cylindrical magnet.
2. Don't get them too close or too far away from the sensor
Based on the above information, we can see that the sensing distance is important. Think of the magnet as the signal to the board. You don't want a weak signal (like under 50 Gauss) and you don't want to overpower it (1000 Gauss is the sensor limit).
3. Use the appropriate magnet size
This brings us to the last bit. If you are not happy with the range a particular magnet gets you, use a different magnet! A smaller magnet of the same type (there are different types, so please consider what kind you are using) will be weaker up close. If you need more range, get a larger magnet and move it away further.
Question 1: Can they be enclosed and do they generate any heat?
In almost all cases, they can be fully enclosed. All electronics, when they are on, generate heat. However, the power these devices draw is very minimal and there is not any concern enclosing them.
Question 2: What else do you struggle with? Feel free to write!