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$200 pledged of $400 goal
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By Rafe Husain
$200 pledged of $400 goal
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About this project

This is a project by my Son Ahmed Husain. He and I are active in the ebike scene having built 3 ebikes.  One of the problems we came up against is measuring DC current without having to put a meter in series. The solutions we found were both expensive and had no data logging capability.  

calisense sensor
calisense sensor

CaliSensor: USB AC/DC current sensor

Non Invasive no load during measurement

Senses current without placing resistor in circuit

Safe to use

Measures current from +100A to -100A with a maximum accuracy of .2A

Current logged and saved to Laptop, Tablet or Smartphone

Specially designed for ebikes and EV’s.

All data logged to USB port.

USB terminal software saves measured data to file

Low cost

Made in USA

Just slide power cable thru sensor
Just slide power cable thru sensor
Or directly on your ebike or ev
Or directly on your ebike or ev

 Stream real time current data to Cell phone

Calisense: The non invasive current sensor theory of operation https://www.kickstarter.com/projects/2144562092/calisense/posts/1050231

Risks and challenges

We came up with a non invasive current sensor using a magnetic toroid and a hall sensor. When we built a prototype and tested it we came up with hall sensor problems.

The Sensor was significantly non linear.

We measured the Hall sensor and modeled it as a piece wise linear sensor and Had Ahmed do the coding to implement the measurement model.

Anyway we have the prototype running and tested. The current challenge is finding a good case and shipping the product

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Funding period

- (60 days)