$750

Fluke PM6690 300MHz Universal Frequency Counter

$72.25

Hewlett-Packard 528B Frequency Converter Unit 100- 220mhz, AS IS UNTESTED

$175

ABB ACS510-01-03A3-4 1.1 kW Frequency Converter 380V-480

$20.33

Crystal Oscillator Frequency Counter Tester Meter, DIY 1Hz-50Mhz Frequency Indic

$195

Neatek HL1-V Counter/Timer Module

$32.22

ENM T1121BB Hour Meter,LCD,2-Hole,4.5 to 28VDC 2PAR5

$38.63

Black Walkie Talkie Frequency Counter Meter Tester Decoder Analog/Mute Counter

$89.95

BK PRECISION 1803 100 MHz Frequency Counter

$14.28

DC 5V Frequency Counter 200Hz–100MHz Frequency Test Pen 0.91-inch OLED Display

$299

AGILENT (HP) 10811-60160 HIGH STABILITY TIMEBASE (OPTION 010) *LOOK* (REF: 706M)

$60

Airpax,79U8D2,Frequency Detector Module

$12.21

Automatic Range Conversion 1Hz-50MHz Crystal Frequency Counter Tester LED PCB D