Digital thermometers are portable temperature sensing devices that have permanent probes and a digital display

Frequency meters are instruments that provide analog outputs as frequencies that vary as a function of the applied input. They display values on a dial, usually with a needle or moving pointer

Temperature instruments use contact or noncontact methods to measure temperature. Products include dial, digital, industrial and laboratory thermometers; temperature probes, indicators, and sensors; RTD elements and transmitters; and thermistors, thermocouples, thermopiles, and thermal switches. 

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

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

Digital multimeters (or multi-meters) are used to measure electrical quantities such as voltage, current, resistance, frequency, temperature, capacitance, and time period measurements

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

Liquid flow meters are used for measuring the flow or quantity of a moving fluid

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. Signal generators can use AC energy, audio frequency (AF) and radio frequency (RF) to function

Gas flow meters are used for measuring the flow or quantity of a moving gas in an enclosed pipe or passage.

Sound level meters and noise dosimeters are used in sound and noise analysis. Applications include industrial safety, traffic noise studies, and scientific noise measurement

Digital pressure gauges use electronic components to convert applied pressure into usable signals. The gauge readout has a digital numerical display

Digital voltmeters are instruments that measure voltage or voltage drop in a circuit. They use solid-state components and display values digitally

Digital ammeters are instruments that measure current flow in amperes and display current levels on a digital display. These devices provide information about current draw and current continuity in order to help users troubleshoot erratic loads and trends

Flow meters (flowmeters) and flow sensors are devices used for measuring the flow rate or quantity of a moving fluid or gas