Keep the Power Flowing

                       Keep the Vehicle Running 


Diligent  is synonymous with intense concentration and hard-working. We will keep improving our quality and enhancing our abilities, which make a commitment to the high technology necessary to keep pace with the changing needs of our customers.

About us

Diligent Instruments is a provider of electric testing tools and measuring instruments for electrical power applications and automotive aftermarket industry. We focus on electrical test and measurement areas.  Our reliable products range from insulation resistance tester and ground resistance tester, to automotive battery analyzer as well. Also as many as what meet your need keep being reached out with our profession and concentration. 


Diligent Instruments offers safety products that meet the highest standards for quality. We are experienced in measurement products which are easy to use and also with competitive prices.