The Thermo Scientific Orion Star A112 Benchtop Conductivity Meter measures conductivity, total dissolved solids (TDS), temperature, and has an IP54-rated housing that can withstand splashes. The meter has linear temperature compensation, one-point manual calibration or automatic calibration, selectable cell constant, and selectable reading reference temperature of 20 or 25 degrees C for an accurate result. The LCD screen with onscreen prompts displays the measurement and temperature simultaneously. The electrode arm and holder (included) helps to place and hold probes in samples. The AUTOREAD feature locks the stable reading onscreen, and the memory can store up to 50 data points. The meter can be wall-mounted to save table space. Certifications include CE, TUV, and FCC Class A limits. Conductivity meters are commonly used in the water-quality testing, waste-water treatment, hydroponics, agriculture, and aquaculture industries, in cosmetics manufacturing, and in laboratory research. Conductivity meters, also known as electrical conductivity (EC) meters, measure the ability of a solution or material to conduct an electrical current. This measurement helps determine if the solution is, for example, contaminated or contains too much saline. In general, pure solutions, such as distilled water, have low conductivity. More saline- or nutrient-rich solutions, such as seawater or fertilizers, have high conductivity. Conductivity measurements are often used with total dissolved solids (TDS) measurements, which are typically expressed in ppm (parts per million). TDS consist of dissolved minerals and salts. To determine the amount of TDS, conductivity is measured, and the result is converted to a TDS measurement. Different meters provide results for conductivity, TDS, or both, and the application determines meter selection. Conductivity meters are used in research laboratories and a variety of industries, such as water-quality testing, waste-water treatment, hydroponics, agriculture, aquaculture, and cosmetics manufacturing. Thermo Fisher Scientific manufactures analytical instruments, laboratory equipment, consumables, and software under the Thermo Scientific, Fisher Scientific, and Nalgene brands, among others. The company is headquartered in Waltham, MA.
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