- Cal Test Electronics has been making a wide variety of electronic accessory and test products since 1995. Their product offering is being brought on as a supplement to our test instrument lines with over 3000 products in 7 major connection categories. As a sister company to B&K Precision, they have a symbiotic relationship. Cal Test Electronics will be able to provide customers with a wider variety of connections as well as custom test cable assemblies in low volumes for bench testing and prototyping.