Frequency Meters / Tachometers with limits

923
Multicolour display, decade keyboard, 60 kHz count frequency.
Power supply: AC+DC
Number of digits: 6

924
Multicolour display, decade keyboard, 60 kHz count frequency.
Power supply: AC+DC
Number of digits: 6

716
Opt. serial interface.

Power supply: AC+DC
Number of digits: 6

717
ATEX version available, opt. Serial interface.
Power supply: AC+DC
Number of digits: 6

560
LED multifunction preset counter, 14 segment LED, automatic help texts.
Power supply: AC+DC
Number of digits: 6

new
571
Timer (also reciprocal), analogue output, serial interface.
Power supply: AC+DC
Number of digits: 6