Flux Density Calculator

The below calculator is designed to calculate the magnetic Flux Density in Oersteds (Oe) of a plain disc magnet.

Enter values below and the result will automatically be calculated.

Br (remanence field of the magnet):   
D (thickness or height of the magnet):   mm
R (radius of the disc magnet):   mm
x (distance from the pole face): 
B:   Oe*

*If µo = 1, Gauss = Oe

Popular manufacturers

Typical values of Br for disc magnet materials: Ceramic 12200 | Ceramic 53300 | Ceramic 83250 | Alnico 512500 Samarium 188600 | Samarium 249600 | Samarium 2610600 | Samarium 3211000 NdFeB 3512300 | NdFeB 39H13000 | NdFeB 4213200 | NdFeB 4513300 | NdFeB 4813800 The table below highlights the range of magnetic sensors we have to offer and their specifications:
Analog Magnetic Sensors
Part Series Linear Range Typical Sensitivity(mV/V/Oe) Maximum Operating Temperature (°C) Saturation (Oe)
NVE AA Series 1.5 to 450 3.6 to 0.1 125°C 15 to 500
NVE AAH Series 0.6 to 7.5 15 to 4 150°C 6 to 15
NVE AAL Series 1.5 to 10.5 3.5 125°C 15
NVE ALT Series -100 to +100 2 125°C 300
NVE AAK Series 400 to 2500 0.0033 85°C 4000
Digital Magnetic Sensors
Part Series Minimum Operate Point Supply Voltage Response Maximum Operating Temperature (°C)
NVE AD Series 1 mT 4.5V to 30V Normal (Omnipolar) 125°C
NVE ADV Series 0.4 mT 4.5V to 30V Bipolar 125°C
NVE AFL Series 0.4 mT 0.9V to 5.5V Normal (Omnipolar) 85°C
NVE ADL Series 2 mT 2.4V to 4.2V Normal (Omnipolar) 125°C
NVE AHL Series 1 mT 0.9V to 2.4V Normal (Omnipolar) 85°C
NVE ADT Series 1.5 mT 2.4V to 4.2V Normal (Omnipolar) 85°C
NVE AHT Series 1.5 mT 0.9V to 1.8V Normal (Omnipolar) 85°C
Smart Magnetic Sensors
Part Number Field Range Accuracy Speed Output
SM124-10E 10 Oe (Omnipolar) 5% 10 kSps I2C, Digital Threshold
SM225-10E 150 Oe (Bipolar) 2% 15 kSps SPI
SM324-10E 20 Oe (Bipolar) 0.3% 300 Sps I2C, Digital Threshold

Need more help? If you have any questions regarding our range or need further assistance with selecting the correct part, we are here to help. Contact us via...​