What is the Activation Sensitivity of the A1302KUA-T HE Sensor in Gauss?

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SUMMARY

The A1302KUA-T Hall Effect sensor has a sensitivity of 2 mV/G, meaning it outputs 1 mV at 0.5 Gauss. When using this sensor powered by 5V from USB, it is crucial to incorporate amplification into the circuit design to accurately detect low voltage signals. The sensor's performance diminishes significantly with distance, as the magnetic field decreases rapidly beyond 2 inches. For optimal results, users should consult an electrical engineer for comprehensive circuit design guidance.

PREREQUISITES
  • Understanding of Hall Effect sensors, specifically the A1302KUA-T model.
  • Basic knowledge of voltage output and sensitivity measurements in mV/G.
  • Familiarity with circuit design principles, including amplification techniques.
  • Experience with magnetic field calculations and distance effects.
NEXT STEPS
  • Research circuit amplification techniques for Hall Effect sensors.
  • Learn about the A1302KUA-T sensor's datasheet specifications and applications.
  • Explore magnetic field strength calculations using tools like the KJ Magnetics field calculator.
  • Study basic electronic circuit design to integrate sensors into measurement instruments.
USEFUL FOR

Electronics enthusiasts, hobbyists working on sensor projects, and engineers seeking to understand Hall Effect sensor applications and circuit integration.

zild1221
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I know NOTHING about electronics like this. However, I am taking on a small project. I have a question that you can probably answer in half a second.

I bought a few HE sensors, which are on their way. I need to know what activation sensitivity this HE sensor has in Gauss.

http://www.digikey.com/product-search/en?mpart=A1302KUA-T&vendor=620

It gives me mV/G. I will be supplying it 5V from USB.

I will be using this calculator to determine the size magnet I need. The furthest the magnet and HE will be is 1.8-2 inches apart. http://www.kjmagnetics.com/fieldcalculator.asp

I appreciate your help. I am hoping I don't need to purchase different HE's for this build.
 
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2 inches is very far. Magnetic field drops rapidly with distance.

You did not give enough information for a compete answer. The device gives you a sensitivity of say 2 mv/G. If you have 0.5 gauss, then 1 mv. Can you sense 1mv? You will need to build the component into an instrument that includes amplification. I presume that you are not just connecting it to a digital voltmeter with alligator clips.

We can't teach you circuit design in this thread. You need the help of a real EE, not answers from the Internet.
 

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