# FGSensors FG-3+ Sensor

**Type:** Product page · **SKU:** SEN-25531 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/fgsensors-fg-3-sensor.html ([markdown](https://core-electronics.com.au/fgsensors-fg-3-sensor.html.md))

The FGM-X series of devices are very high sensitivity magnetic field sensors operating in the ±50 microtesla range ( ±0.5 oersted )...

## Pricing

- **Price:** $109.95 (inc GST) — $99.95 AUD, exc GST
- **Quantity discounts:** 5+ $96.95 (exc GST) · 25+ $94.95 (exc GST) · 100+ $90.95 (exc GST)

## Availability & dispatch

- Out of stock — the product page offers email notification when it returns.

## Description

The FGM-X series of devices are very high sensitivity magnetic field sensors operating in the ±50 microtesla range ( ±0.5 oersted). They are simple, essentially three terminal devices, operating from a single +5 volt supply, the connections being ground, +5v and output. The output is a robust 5 volt rectangular pulse whose period is directly proportional to the field strength, (giving a frequency which varies inversely with the field), making it very easy to interface to a computer or micro controller. The typical period swing for the full range of an FGM-3 is from 8.5 µs to 25µs (~120 KHz to ~50KHz), a clear indication of its high sensitivity.

Unlike Hall Effect field sensors, which are virtually unusable in this range because of their large temperature sensitivity, the FGM-series has a very low temperature coefficient. Since the lowest effective Nyquist sampling rate is ~50 KHz, appropriate filtering can provide an AC field bandwidth from DC to ~20kHz.

### Features

- Maximum Supply Voltage 7 volts
- Recommended supply Voltage 5 volts ±0.5 volts
- Typical Supply Current 12 mA
- Operating Temperature Range 0 - 50 °C
- Bandwidth: DC to 20 KHz Bandwidth
- Output freq. range: 120 kHz to 50 kHz ( 8.5 milliseconds to 25 milliseconds)

### Documents

- [Datasheet](https://core-electronics.com.au/attachments/localcontent/1593cf_c3b258ce927b47449402b387d8785a70_39257633cab.pdf)
- [Test Report](https://core-electronics.com.au/attachments/localcontent/7034a0_7c942a70f1074c8091d6ec67f5a69add_4453816c4e5.pdf)
- [App Note](https://core-electronics.com.au/attachments/localcontent/7034a0_505d6150a82448c8ae711f0df33e4a0d_90885ffe522.pdf)
- [Specifications](https://core-electronics.com.au/attachments/localcontent/7034a0_c59536c9022b4a5798fcc6045dcf6841_56895857ed6.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/S/E/SEN-25531-1.jpg)