High-precision 3D Electronic Compass Veneer (plane Calibration)

ER-EC31B(0.5°) Main characteristics
● Azimuth accuracy: 0.5°~0.8°
● Inclination measurement range: ±85°
● Inclination resolution: 0.1°

Product Details

High-precision 3D Electronic Compass Veneer (plane Calibration)


ER-EC31 High-precision 3D Electronic Compass Veneer (plane Calibration) is a high-precision 3D electronic compass that uses a 2D planar calibration algorithm. Calibration eliminates the need for three-dimensional attitude tilting, and the calibration process is completed by simply rotating the plane one turn. Using the hard magnetic and soft magnetic calibration algorithms of the US patent technology, the compass can achieve the best effect through the three-dimensional calibration method in the environment with magnetic interference. ER-EC31B integrates the three-axis fluxgate sensor and is real-time through the central processing unit. Solving heading and using a three-axis accelerometer to compensate for heading over a wide range of tilt angles, ensuring that the compass provides high-precision heading data at tilt angles up to ±85°. The electronic compass integrates high-precision MCU control and diversified output modes. The standard interface includes RS232/RS485/TTL interfaces, and other communication interfaces can be customized.

ER-EC31B is small in size, low in power consumption, and can be applied in many fields such as antenna stabilization, vehicle and system integration. High shock resistance and high reliability also make the compass work in extremely harsh environments, which is more suitable for today's small Chemical military high precision measurement integrated control system.



Azimuth accuracy: 0.5°~0.8°

Inclination measurement range: ±85°

Inclination resolution: 0.1°

Inclination accuracy: 0.3°

Wide temperature range: -40°C~+85°C

Size: L43×W35×H8mm

With hard magnetic, soft magnetic and tilt compensationoutput interface

Standard RS232/RS485/TTL

DC 5V power supply

2D plane calibration


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Special occasion robot

Unmanned aerial vehicle


ER-EC31B performance parameter indicator

Compass heading parameter

Optimum heading accuracy

0.5° oblique<10°

1.0° oblique<30°

2.0° oblique<40°

2.5° oblique<70°



Compass inclination parameter

Pitch accuracy

0.1°<15°(Measuring range)

0.2°<30°(Measuring range)

0.3°<60°(Measuring range)

0.3°<85°(Measuring range)

Pitch oblique range


Roll accuracy

0.1°<15°(Measuring range)

0.2°<30°(Measuring range)

0.3°<60°(Measuring range)

0.3°<85°(Measuring range)

Roll oblique range




Compass tilt optimal compensation angle range



Hard iron calibration


Soft iron calibration


Magnetic field interference calibration method

One rotation of the plane (two-dimensional calibration)

Physical characteristics




20 g

RS-232/RS485/TTL interface connector

5PIN connection terminal

Interface characteristics

Start delay

<50 ms

Maximum output rate


Communication rate

2400~ 19200baud

Output format

Binary high performance protocol

power supply

Supply voltage

(default) DC +5V

(custom) DC 9 ~ 36V
Current (maximum)


Ideal mode


Sleep mode



Operating range


Storage temperature


Anti-vibration performance


Electromagnetic compatibility

According to EN61000 and GBT17626

Mean time between failures

≥40000 hours/time

Insulation resistance

≥100 MΩ

Impact resistance

100g@11ms, three axes and the same (half sine wave)

Vibration resistant



40g (without cable)

Product size chart



1. What is your quotation condition?

If you have DHL or Fedex account ,we can quote EXW price ,otherwise CIF or FOB price.

2.Do you have any discount when procurement? 

We will quote sample price at first and we will quote volume price if you need more quantity.

3.How long is the delivery time?

For sensors,parts,modules : in stock-one week;no stock-2-4weeks; For systems,generally ,8-12 weeks.

4.How to deal with the quality problems?

If confirmation of product quality problem we can replace it freely for customer in the shortest period.

If interested in High-precision 3D Electronic Compass Veneer (plane Calibration), pls contact us : info@ericcointernational.com