With an astonishing 0.3º RMS heading accuracy

Digital Magnetic Compass

For applications that require consistency and accurate heading, pitch and roll in all latitudes globally, TCM-XB and TCM-MB are high-performance, low-power consumption, tilt-compensated electronic 6-axis digital compass modules with 0.3° RMS heading accuracy.


Not recommended for new designs.


PNI’s TCM was the first electronically tilt compensated compass to replace gimbled flux gate compasses that only worked when level. PNI pioneered the first digital magnetic compass that worked in real-world conditions and Its reliability has been field tested for over 20 years.


Two form factors are available — the TCM-MB offers the same features and accuracy as the TCM-XB in a smaller footprint with TTL output.


Unlike other digital magnetic compasses, TCM-XB and TCM-MB with PNI’s high sensitivity magnetic sensors provides accurate heading even at high latitudes where magnetic compassing signals are small, making accurate determination of heading difficult.


​ITAR-free and made in the U.S.A

Technical Specifications

Heading Accuracy
(full range calibration)
Tilt Accuracy0.2° rms
Supply VoltageTCM XB: 3.8 – 9 VDC
TCM MB: 3.3 - 9 VDC
Average Current Draw
(max sample rate)
TCM XB: 20 mA
TCM MB: 17 mA
Sleep Mode Current Draw0.1 mA
Maximum Sample Rate Hz30 Hz
Communication InterfaceTCM XB: RS232 UART
DimensionsTCM XB: 35 x 43 x 13 mm        
TCM MB: 33 x 31 x 13 mm
WeightTCM XB: 6.8 gm
TCM MB: 5.3 gm
Operating Temperature-40° to +85° C

Download Documentation

Try our products for yourself

Order one of our Evaluation Kits and try out our products and amazing technology for yourself.

Other PNI products you might be interested in:

TargetPoint 3 ⇒

Low-SWaPC Targeting Compass for target locating

Headway ⇒

Calibration-free Low SWaP-C AHRS Targeting Module

Prime Pro ⇒

Digital Magnetic Compass

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.


(707) 566-2260




2331 Circadian Way
Santa Rosa, CA 95407

 Order your

Eval Kit

Fill out the following form to order your TCM-XB and TCM-MB Eval Kits.