Dear Technical Support Team,
Do you have a solution to detect almost empty of liquid tank with hall sensor(DRV5xxx)?
I don't need the liquid level.
If you have application example, please let me know.
Best Regards,
ttd
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Dear Technical Support Team,
Do you have a solution to detect almost empty of liquid tank with hall sensor(DRV5xxx)?
I don't need the liquid level.
If you have application example, please let me know.
Best Regards,
ttd
Hello ttd,
Thank you for using the TI forum. Hall effect devices are well suited for this application, however I am not aware any currently existing application examples. Here are a couple ways this could be accomplished (in all cases the liquid level will adjust the position of the magnet relative to the sensor):
1) With a Hall switch (DRV5021, DRV5023, DRV5032, DRV5033): The magnet could move directly toward the sensor (with the pole of the magnet facing the sensor) as the liquid gets lower. When the liquid is low enough then the sensor will trip. With this solution, the strength of the magnet and the sensitivity of the sensor will determine what fluid level the system detects.
2) With a Hall latch (DRV5011, DRV5012, DRV5013, DRV5015): The magnet can pass by the sensor (with the side of the magnet facing the sensor) as the liquid gets lower. The sensor will trip right as the magnet passes the sensor, and will release when the magnet passes on the way back. The advantage of this method is that the liquid level to detect is determined by the location of the sensor, not the strength of the magnet/sensitivity of the sensor. The latch device allows the sensor to stay active even if the fluid level continues to decrease and the magnet moves out of range.