Frequency meters are instruments that provide analog outputs as frequencies that vary as a function of the applied input.

Phase-locked loop (PLL) frequency synthesizers are electronic devices that produce frequencies coherent to a reference frequency

Frequency counters are digital indicating meters for accurate measurement and display of square wave and pulse input signals

Metering pumps are precision pumps, which dispense an exact amount of material.

Sound level meters and noise dosimeters are used in sound and noise analysis.

Analog panel meters measure and display processes and electrical variables with a simple dial display

Signal generators and waveform generators are used to test and align all types of transmitters and receivers, to measure frequency and to generate a signal, waveform or noise source.