The FC-660 is a bench type professional digital frequency counter capable of measuring frequency up to 100MHz.

The FC-660 frequency counter has the following features:

• 8 digits of 0.5, green 7-segment LED display.
• Trigger level can be adjusted from -2.5V to +2.5V or set to 0V.
• Low Pass Filter (LPF) up to 100KHz can be switched on to reject high frequency noise when a low frequency signal is measured.
• AC or DC coupling can be selected.
• Meets IEC-1010-1 (EN61010-1) safety requirements.