The most accurate Low-SWaP magnetic sensor on the planet.

RM3100 Magnetic Sensor

Incredible resolution with low power, low mass, small size and large dynamic range.


Impeccable signal to noise, no drift, and precise magnetic field measurements make integration of the RM3100 sensor simple and ideal for underwater, air, satellite, and spacecraft application.


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.


Stable and reliable over time and temperature and extremely radiation tolerant.


I2C and SPI interfaces.


Proven in real world across a wide range of applications requiring a Low-SWap heading sensor.


Download results from Lawrence Berkeley Cyclotron radiation and heat test below.

Technical Specifications

Cycle Counts
Field Measurement Range± 1100 µT
Noise30 nT20 nT15 nT
Gain @ 3V (LSB/µT)20 µT38 µT75 µT
Linearity over ± 200 µT0.5% (typical)
Sensitivity50 nT26 nT13 nT
Max 3-Axis Sample Rate534 Hz284 Hz147 Hz
Current Usage @ 8 Hz, 3 Axes70 µA135 µA260 µA
Circuit Oscillation Frequency180 kHz
InterfaceSPI and I2C
Operating Temperature Range-40°C to +85°C
Size (L x W x H)SEN XY
RM3100 Breakout Board
6.0 x 2.1 x 2.2
3.88 x 2.98 x 6.35 mm
4.0 x 4.0 x 0.75 mm
25.4 x 25.4 x 7.1 mm

Downloads for RM3100

Related Articles

Single-event effect testing of the PNI RM3100 magnetometer for space applications

Investigation of a low-cost magneto-inductive magnetometer for space science applications

Try our products for yourself

Order one of our RM3100 Breakout Boards to easily evaluate the performance of our RM3100 sensor suite.

RM3100 Breakout Board Unit

Price per unit:


Available to ship September 15, 2023.

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 ten (10) units. Please contact if you wish to purchase larger quantities.

SKU: 14190-1 / 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

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