Magnetic Field Strength Calculator

Magnetic Field Strength Calculator: Use this calculator to determine the magnetic field at a specified distance from the surface of a cylindrical or rectangular magnet.

• Diameter, Width, Thickness, Length, and Distance: These are passive input fields marked with vertical lines ending in front of each field. You must enter numbers in all these three or four fields (rectangular magnets has four fields), along with one of the dynamic fields, for the calculator to function.
• Residual Induction (Br) and Field Strength: These are dynamic input fields marked by horizontal lines in front of each field. The red line is the default calculation field. Once the passive fields Length, Width (or Diameter), Thickness, and Distance contain numbers, entering or adjusting a value in either the Residual Induction or Field Strength field will automatically calculate and update the value in the other dynamic field.
Fig. Cylindrical Magnet Field Strength Calculator

#### Inputs:

1. Magnet Diameter (D) (Cylindrical Magnets): Enter in the text field.
2. Magnet Length (L) (Rectangular Magnets): Enter in the text field.
3. Magnet Width (W) (Rectangular Magnets):   Enter in the text field.
4. Magnet Thickness (T) : Enter in the text field.
5. Distance (X) to the Measurement-Point (B): Enter in the text field.
6. Grade - Residual induction (Remanence Br): Select from a list of strengths ranging from N35 to N52, or manually enter a Residual Induction value. By manually inserting a value in the related text-field, this will automatically change the Grade selection to Manual.
7. Field Strength (Flux Density) in the X-direction at Point  B: Displays the field strength.

Fig. Magnets: Shows dimensions such as Length (L), Diameter (D), Width(W), Thickness(T) and distance(X) from the surface to the measurement point (B) as demonstrated below.

Simplified Re-Calibration of Gaussmeter and the Comparison of two different A1302 Hall-effect Probes

The solenoid setup, while accurate, can be complex and cumbersome to use frequently for re-calibration of the gaussmeter. A simpler, more portable setup can be created using a magnet glued to a magnetically inert plate (such as plastic or wood) with marked intervals, which can serve as a practical reference for quick re-calibrations. After calibrating the gaussmeter with the solenoid, use it to measure the magnetic field at each marked distance (X) on the plate, and record the corresponding magnetic field values (B) directly on the plate above each distance marking for quick reference.