Products › Encoder Tester 7 Pin Image 1 of 5 Image 2 of 5 Image 3 of 5 Image 4 of 5 Image 5 of 5 Encoder Tester 7 Pin $300.00 Encoder tester used to verify operation of 7 pin encoders. The Encoder tester is powered by a 9 Volt Battery. Add To Cart Added! Encoder tester used to verify operation of 7 pin encoders. The Encoder tester is powered by a 9 Volt Battery.