Dissolved oxygen sensors are used to measure the amount of oxygen dissolved in a unit volume of water.

Flow computers, totalizers, and rate indicators integrate the functions of flow and temperature measurement, computation, data acquisition, input / output (I/O) standardization, and closed loop control.

Positive displacement flow meters measure the volume or flow rate of a moving fluid or gas by dividing the media into fixed, metered volumes.

Gas sensors interact with a gas to initiate the measurement of its concentration.

Gas and air instruments detect, monitor or analyze gases present in an environment.

Calibration instruments use electrical signals or physical quantities to calibrate sensors and meters.

pH and oxidation reduction potential (ORP) instruments measure or monitor pH (relative concentration of hydrogen ions [H+] in a solution) as well as ORP.