Handheld gas detectors and wall-mounted gas detectors/transmitters (Honeywell). Gases: chlorine, oxygen, hydrogen sulfide (H2S), etc.
Turbidimeters, chlorine analyzers, streaming current monitor, online UV % transmission analyzers, biodegradable turbidity standards (NTU) and DPD reagent dispensers.
Measuring instruments including voltmeters, ammeters, anemometers, infrared thermometers and even more.