Optoelectronics Frequency Counter Model 7010A - 600 MHz Untested

Optoelectronics Frequency Counter Model 7010A - 600 MHz - UNTESTED

Optoelectronics Frequency Counter Model 7010-S 600 MHz

DataScan MODEL C1400 10HZ-1..4GHZ FREQUENCY COUNTER * Untested

OPTOELECTRONICS OPTO-7000 FREQUENCY COUNTER - No Power cord

TFC-2700L High Frequency Counter 8 LED Display 100MHz-2.7GHz Long Wei

TFC-1000L Multifunctional High Precision Frequency Counter Meter 8-Bit LED Displ

BK B&K Precision Model 1823A 2.4GHz Universal Frequency Counter PARTS