Magnetic Reed Switch

This is the tiny reed switch found in the sensor unit for the Sigma BC series bicycle computers, popular with many motorcycle riders. It can also be used to replace the reed switch found in the fuel level sensor in late model Guzzis. This switch is normally open but closes when subjected to a magnetic field. It is rated at 0.5 amps (6 watts at 12 vdc).

Price is $2.00 each including shipping within the USA. Send check or money order to:

DesignTech Engineering, LLC.
P.O. Box 293
Beaver Dam, WI  53916

E-mail us for faster service, questions or price quotes for shipping outside the USA.


Sigma Sensor Repair 

Pry off the end

Slide the circuit board out of the case

Clamp a heat sink onto the reed switch lead before soldering