The most accurate Low-SWaP magnetometer sensor on (and off) the planet
RM3100
Tri-Axis Magnetometer Sensor
Unmatched precision with ultra-low power, compact size, and an extensive dynamic range—built for the most demanding applications.
Accurate Navigation & Positioning Start
with Precision Magnetic Field Measurement
Traditional Hall-effect sensors struggle with resolution and noise, limiting their effectiveness in high-precision applications. The RM3100 Magnetometer is a Magneto-Inductive technology that delivers 23× better resolution and 33× lower noise, offering superior magnetic field data accuracy. Whether for land, underwater, aerial, or space navigation, the RM3100 ensures precise measurements, unlocking new possibilities for navigation, positioning, and scientific exploration.
Exceptional Sensitivity, Stability & Noise Performance.
Getting accurate navigation and position data depends on having accurate magnetic field measurement to begin with. Unlike traditional Hall-effect sensors, the RM3100 magneto-inductive sensor has over 23 times better resolution and 33 times less noise resulting in far more precise data outputs.
Proven reliability under extreme conditions, including thermal shock, mechanical impact, radiation, and temperature fluctuations.
Installed in over tens of millions of devices worldwide, and trusted by leading military and commercial companies for use in key equipment. And it’s tested and approved by NASA.
The RM3100 delivers impeccable signal-to-noise, drift-
free, precise magnetic field measurements, ideal for
underwater, ground, air, and space applications. It offers pinpoint resolution with low power, low mass, small size and large dynamic range features.
Detects magnetic fields as low as 2.7 nT at 1Hz, with an industry-leading noise floor of 4 pT/√Hz at 1Hz.
Maintains a linear response across 100,000 nT, ensuring accurate field measurement in dynamic environments.
Stable and reliable over time and temperature and extremely radiation tolerant, the RM3100 has I2C and SPI interfaces.
Technical Specifications
Technical SpecificationsTechnical Superiority — Specifications That Set a New Standard
The RM3100 Tri-axis Magnetometer is engineered for unmatched precision, stability, and efficiency. With an ultra-low noise floor, high sensitivity, and minimal power consumption, it provides industry-leading performance across a wide range of applications. Below are the key technical specifications that make the RM3100 the preferred choice for navigation, aerospace, and scientific measurements.
| Sensitivity | 13nT |
| Noise | 15nT |
| Linearity over +/- 200 uT | 0.50% |
| Field Measurement Range | +/- 1100 uT |
| Current @ 8Hz, 3 Axes | 260 uA |
| Interface | SPI and I2C |
| Operating Temperature | -40°C to +85°C |
Downloads for RM3100
Related Articles & Sample Codes
Abstract for the Lawrence Berkeley National Lab testing
Single-event effect testing of the PNI RM3100 magnetometer for space applications
RM3100 Arduino Sample Code
RM3100 Arduino Uno Sample Code
Arduino RM3100 Driver
RM3100 Driver for CircuitPython
What Makes the RM3100 the Industry Standard?
The RM3100 Magneto-Inductive Magnetometer Sensor stands out as the benchmark for precision magnetometry, delivering unrivaled accuracy, stability, and resilience in diverse environments. Unlike other low SWaP magnetometers, it offers exceptional signal-to-noise performance, zero bias drift, and superior environmental resistance, making it the trusted choice for mission-critical applications—from navigation and robotics to aerospace and deep-space exploration. Here’s what sets the RM3100 apart:
Unmatched Resolution & Accuracy
Delivers industry-leading magnetic field resolution and accuracy; magnetic sensing inputs necessary to ensure ultra-precise navigation and positioning.
Resilience Against Environmental Variability
Maintains measurement stability over time and temperature fluctuations, ensuring reliable performance in all conditions.
Superior Signal-to-Noise Ratio & Stability
Minimizes measurement uncertainty, providing a clear, stable signal.
Wide Dynamic Range & High Resolution
Ensures precise data capture across a broad magnetic field range, maintaining accuracy across applications.
Zero Bias Drift for Magnetometers
Eliminates long-term measurement uncertainty due to drift. Reliable measurements at all times.
Radiation-Hardened for Space Applications
NASA-approved, rigorously tested for radiation tolerance, making it the preferred choice for satellites and deep-space missions. Low SWaP-C makes it ideal for small Space systems.
Trusted Across Millions of Devices in Critical Applications
Deployed in tens of millions of devices worldwide, the RM3100 is the go-to solution for demanding environments. Its low-SWaP (Size, Weight, and Power) design makes it ideal for:
- Underwater Navigation – Ensuring precise geolocation in GPS-denied environments.
- Ground-Based Systems – Enhancing geophysical surveys and subsurface exploration.
- Aerospace & Satellites – Providing critical magnetic data for spacecraft attitude control.
- Autonomous Vehicles & Robotics – Supporting AI-driven navigation with high-resolution field sensing.
Experience the RM3100 Difference—Unrivaled Precision Starts Here!
Order one of our RM3100 Breakout Boards to easily evaluate the performance of our RM3100 sensor suite.
RM3100 Breakout Board Unit
Price per unit:
$25.00
3-axis Magnetometer Sensor Suite Evaluation Board
This Breakout Board incorporates both I2C and SPI interfaces for system design flexibility and easily connects to Arduino, Raspberry Pi, and other microcontroller boards.
Note: Maximum order quantity is 100 units. Please contact sales@pnisensor.com if you wish to purchase larger quantities.
SKU: 14190 (RM3100 Breakout Board) / Category: Magnetic Sensors
RM3100-CB Unit
Price per unit:
$50.00
Ruggedized 3-axis Magnetometer Sensor Suite on Compact Board
Maximum order quantity is 100 units. Please contact sales@pnisensor.com if you wish to purchase larger quantities.
SKU: 14754 (RM3100 Compact Board) / Category: Magnetic Sensors
RM3100 Sensor Suite Units
10 RM3100 Sensor Suite Sets:
$25.00
3-axis Magnetometer Sensor Suite
The RM3100 Sensor Suite is sold in MOQ (minimum order quantity) of 10 sensor suites. Each sensor suite has 2 SEN-XY (PN 13104), 1 SEN-Z (PN13101) and 1 ASIC drive circuitry (PN13156).
We recommend the RM3100 Breakout Board (PN 14190) for quick and easily evaluation.
Note: Price is $250 for 10 RM3100 Sensor Suite kits. Please contact sales@pnisensor.com if you have any questions or if you need a quote for more than 50 pcs.
SKU: 90053 (RM3100 Sensor Suite) / Category: Magnetic Sensors
Other PNI products you might be interested in:
Prime Pro ⇒
Digital Magnetic Compass
NaviGuider ⇒
IMU orientation module system for UAVs, robots and buoys
RM3100-CB ⇒
Ruggedized to withstand extreme vibration
Ask our experts
Get direct advice from our engineers in less than 24 hours. We are available Monday through Friday, 9:00 am to 4:00 pm, Pacific Time.
Phone
(707) 566-2260
Quotes:sales@pnisensor.com
Support:
support@pnisensor.com
Address
501 American Way
Windsor, CA 95492