Frequency Meters / Tachometers with limits

923
Multifunction (Pulse, Frequency, Time) 60 kHz, 1-6 presets.
Power supply: AC+DC
Number of Digits: 6
924
Multifunction (Pulse, Frequency, Time) 60 kHz, 1-6 presets.
Power supply: AC+DC
Number of Digits: 6
716
Multifunction (Pulse, Frequency, Time).
Power supply: AC+DC
Number of Digits: 6
717
Multifunction (Pulse, Frequency, Time), also with Ex.
Power supply: AC+DC
Number of Digits: 6
560
Multifunction (Pulse, Frequency, Time), help texts.
Power supply: AC+DC
Number of Digits: 6
571
Impulse, Frequency, Time (also reciprocal). With analogue output or serial interface.
Power supply: AC+DC
Number of Digits: 6