telephone icon

Call +44 (0) 1342 717102

Heading Sensors - Electronic 3-Axis Compass Modules - TCM-XB & TCM-MB

Sub 1º Accuracy in Real World Conditions

TCM 5LT Electronic Module

Provides pinpoint-accurate pitch, roll and compass heading in real-world conditions, performing reliably and repeatably in the field — not just in the factory.

Where GPS is compromised or unavailable — whether underwater or underground, beneath a bridge or inside a building — PNI’s FieldForce® TCM tilt-compensated compass modules provide reliable, pinpoint-accurate pitch, roll and compass heading.

The TCMs use advanced algorithms to counter the effects of hard and soft iron interference, providing highly accurate heading information in most any environment and any orientation. PNI’s patented magneto-inductive sensors and pioneering measurement technology combine to provide all this performance under a low power budget that extends mission duration

The TCMs’ unmatched performance in real-world conditions makes them ideal for applications that require consistency and accuracy in the field — far target location, object tracking, and more.

3-Axis measurement
High Resolution / Accuracy
Hard- and soft- iron correction
Low Power Consumtion

TCM XB Electronic Compass Module  

Sub 1° accuracy...

The TCM is a high-performance, low power consumption, tilt-compensated electronic compass module that provides industry-leading heading accuracy.  The TCM combines PNI's patented 3-axis geomagnetic sensors and 6-axis MEMS accelerometer with PNI's proprietary factory calibration algorithms to ensure absolute accuracy. real world conditions.

PNI recognises there's a difference between performing well in the factory and perfoming well in the field. The TCM's advanced field calibration algorithms account for these differences by correcting for local magnetic distortions. Applications may have physical constraints for doing calibration, the TCM provides 4 different calibration methods, as well as the ability to recalibrate the accelerometers to ensure long-term accuracy.

The TCM's measurement technology inherently ensures the module is free from offset drift and provides high measurement resolution, which is critically important at high and low latitudes where the dip angle (inclination) limits the usefulness of other compasses. So the TCM performs well in the field, not just in the factory.


 Heading Accuracy < 0.3 ˚rms ≤65 ˚of tilt after full range calibration
< 2.0˚rms ≤5 ˚of tilt after 2D calibration

< 2.0˚rms ≤2 times the calibration tilt angle

after limited-tilt calibration

Repeatability 0.05° rms
Resolution 0.1°
Accuracy 0.2° rms
Repeatability 0.05° rms
Resolution 0.01°
Maximum Dip Angle (functional) 85°
Calibrated Field Measurement Range ±125 µT
Maximum Sample Rate ≈30 samples/second
Communication Interface TCM MB Binary CMOS/TTL UART
TCM XB Binary RS232
Power Requirements XB Average Current Draw (@ max. sample rate)  20 mA
MB Average Current Draw (@ max. sample rate) 17 mA
XB Current Draw in Sleep Mode 0.3 mA
MB Current Draw in Sleep Mode 0.1 mA
Supply Voltage TCM XB 3.6 ~ 5VDC (unregulated)
Supply Voltage TCM MB 3.3 ~ VDC (unregulated)
Dimensions (L x W x H) TCM XB 3.5 x 4.3 x 1.3 cm
TCM MB 3.3 x 3.1 x 1.3 cm

* Subject to change 


For more information and pricing on the TCM XB and TCM MB high performance compass modules:  Contact Willow +44 (0) 1342 717102


Willow Technologies Ltd. Unit 3 Borers Yard, Borers Arms Road, Copthorne, West Sussex, RH10 3LH, UK

Tel: +44 (0) 1342 717102, Fax: +44 (0) 1342 717014, Email:

CORPORATE: Solid State Group

Privacy Policy • Cookie Policy
Developed by Paramount Web Technology