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The Thermo Scientific Orion ROSS combination refillable pH electrode comes with a waterproof connector and has a flushable junction that expels contents by pressing on the cap to prevent clogs and contamination. The electrode provides readings to 0.01 pH in less than 30 seconds, and it has a double junction reference to protect against silver wire contamination when testing dirty water and solutions with heavy metals or organics. This combination electrode contains both the measuring half-cell and the reference half-cell to minimize electrostatic interference and provide consistent readings. It has an epoxy body that is impact resistant and durable. The electrode measures pH from 0 to 14, withstands temperatures from 0 to 100 degrees C (32 to 212 degrees F), and is 12mm in diameter and 120mm long. The electrode has a 1m cable with either a waterproof Bayonet Neill-Concelman (BNC) connector for attaching to meters with a BNC connection or a waterproof Deutsches Institut für Normung (DIN)-compliant connector for attaching to meters with a DIN connection. The electrode is refillable so the filling solution composition can be adjusted to suit the sample requirements, and it comes with a 60mL bottle of 3M KCl filling solution for refills. The electrode also includes a detachable bulb guard to protect the bulb. pH electrodes measure the acidity or alkalinity of a substance and are commonly used by researchers, manufacturers, and hobbyists in hydroponics, aquaculture, agriculture, and winemaking, among other applications.
An electrode, also called a sensor or probe, is an instrument used with a meter to test and measure parameters of a substance. All electrodes are probes or sensors, but not all probes are electrodes or sensors. Probes, such as temperature probes, are used to penetrate a material for measurement. Common electrode types are pH, total dissolved solid (TDS), oxidation reduction potential (ORP), and ion selective electrode (ISE). They come in standard models or in all-in-one (sometimes called 3-in-1) models, which have a built-in temperature sensor for automatic temperature compensation (ATC). Electrodes can be half-cell or full- (also called combination) cell type. They can be refillable or non-refillable. Housing material is typically glass or epoxy, and sensors are commonly made with stainless steel or a glass bulb. pH electrodes, which measure the pH of a substance, often have a glass bulb. The bulb senses hydrogen ions, and generates a millivoltage that is picked up by the filling solution and transferred to a wire that connects to the pH meter. ORP, also known as redox, electrodes measure dissolved oxygen in aqueous solutions to determine the level of contaminants and their ability to act as oxidizing or reducing agents. Ion selective electrodes (ISEs) respond selectively to ions in the presence of other ions. Electrodes are commonly used by researchers, manufacturers, and hobbyists in a wide variety of industries, such as aquaculture, agriculture, chemistry, food and beverage, wine-making and water-testing, and for scientific applications. An electrode can be used with a datalogger to assist in temperature measurement.
Thermo Fisher Scientific manufactures analytical instruments, laboratory equipment, consumables, and software under the Thermo Scientific, Fisher Scientific, and Nalgene brands, among others. The company was founded in 2006, and is headquartered in Waltham, MA.
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