# RM3100

![](https://2868710084-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LXNkiDAfBq1Vqjka00H%2F-L_Ni85v8qIfGt5yl9cX%2F-L_Ni9ovkXiLGpHwEvnj%2FProfessional-Grade-Magnetometer-RM3100-2.png?alt=media\&token=1c271710-28a1-4d0b-a688-0f3ea237d39d)

[Professional Grade Magnetometer RM3100](https://store-drotek.com/893-professional-grade-magnetometer-rm3100.html) by Drotek is a ready-to-use and operational module that eliminates any noise in your magnetic field measurements for accurate heading and orientation calculations. This sensor is a heading reference to your drones so it can navigate through waypoints and eliminate magnetic disturbances due to motor coils and metal parts.

This 3-axis magnetometer, based on PNI’s proprietary magneto-inductive technology, delivers high-performance resolution and repeatability, with over 10 times better resolution and over 20 times lower noise than the leading Hall Effect sensor. 

Professional Grade Magnetometer RM3100 provides a very high level of resolution (10 nT), with low power consumption and no hysteresis and can be used for applications that require high accuracy.

## How to position the sensor?

Refer to the **schema** on your sensor module with X,Y, Z axis. 

![](https://2868710084-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LXNkiDAfBq1Vqjka00H%2F-L_NhWTkVWWG6ff9zo-S%2F-L_NhZqCoSGuo7oLfCYl%2FProfessional-Grade-Magnetometer-RM3100.png?alt=media\&token=3dcf3ae3-c57a-4d62-9d98-98bc0043fb29)

This schema is on a NED (North East Down) repository as flight controllers. You need to place the module with the **X arrow to the top** of your autopilot, the **Y arrow to the right** (East) and **Z arrow down.**  

![](https://2868710084-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LXNkiDAfBq1Vqjka00H%2F-L_NfvQr_tCvPWndcHcm%2F-L_Ng-IbW5TcK3IR8rC1%2FRM3100-drotek.png?alt=media\&token=25a72735-4dcf-4ade-b7c2-d8d8dab523d9)

{% hint style="info" %}
Once the sensor is positioned in this way nothing prevents you from applying a rotation to the sensor in the "**Set Orientation**" section of the "**Sensor calibration**" menu of QgroundControl if you want to place it in another way .
{% endhint %}