Encoder Products Company TR3 Accu-Coder™ Heavy Duty Tru-Trac™ is an integrated heavy duty encoder and spring-loaded measuring wheel assembly all in one, easy-to-use, compact unit. Available in both single and optional dual-wheel format, the TR3 Heavy Duty Tru-Trac™ is a versatile solution for tracking velocity, position or distance over a wide variety of surfaces in many industrial applications. Its spring-loaded torsion arm provides a simple-to-adjust torsion load, allowing the TR3 Heavy Duty Tru-Trac™ to be mounted in any orientation, even upside-down. The TR3 Heavy Duty Tru-Trac™ housing is an all-metal work horse, specifically designed to take on your toughest application environments at operating speeds up to 3000 feet per minute. Just one look and it’s easy to see the TR3 Heavy Duty Tru-Trac™ is the ideal solution for countless applications.