2D Datarecording
2D is a supplier of sensors and systems primarily used for racing applications. The 2D products are used by all the main teams both in car and bike racing.
http://www.2d-datarecording.com/home.html

Corrsys Datron
Corrsys Datron supply the Correvit® range of optical non-contact speed sensors. The sensors are available in either one axis or two axis (slip) sensors.
http://www.corrsys-datron.com/optical_sensors.htm

Isaac Instruments Inc
Isaac Instruments Inc make a full range of compact data recorders and sensors for use in a wide variety of industries where mobile applications are required.Isaac systems are in use on cars,trucks,mountain bikes,construction vehicles,quad-bikes and even powered wheelchairs.
http://isaac.ca

Oxford Technical Solutions
Oxford Technical Solutions provide the RT Inertial Navigation Systems. Please contact us to discuss your application.
http://www.oxts.co.uk

Raffenday
Raffenday provide wiring solutions from single lead preparartion to full wiring harnesses.
http://www.raffenday.co.uk