The Thermo Scientific Orion ROSS 8611BNWP refillable combination sodium ion selective electrode (ISE) has a glass bulb sensor for measuring the sodium (Na+) concentration in steam condensates, clinical analysis samples, serums, food, wine, glass, sea water, and other aqueous solutions. This combination electrode contains both the measuring half-cell and the reference half-cell to minimize electrostatic interference and provide consistent readings. It has a double-junction ROSS reference to protect against silver wire contamination and help prevent clogging in dirty water and solutions with heavy metals or organics. The ROSS reference provides readings that are more prompt, stable, and accurate than conventional sodium ISEs. The electrode has a glass body for an improved seal and resistance to corrosive materials, organic compounds, and solvents, and its glass bulb sensor is formulated specifically for sodium ion measurement.

The ISE has a measurement range that is saturated to 0.02 parts per million (ppm) (saturated to 1E-6 M), and the main interfering ions are K+, Li+, Rb+, NH4+, Ag+, and Tl+. The electrode operates in temperatures ranging from 0 to 100 degrees C (32 to 212 degrees F) and is recommended for use in solutions with pH ranging from 6 to 12. It is 12mm in diameter and 120mm long, and has a 1m cable with a waterproof Bayonet Neill-Concelman (BNC) connector for attaching to meters with a BNC connection. The electrode comes with a 50 mL bottle of ROSS sodium electrode filling solution and one 475mL bottle each of sodium ionic strength adjustor (ISA), sodium known addition standard, 1,000 ppm sodium standard with ISA, 1,000 ppm sodium standard sodium reconditioning solution, and sodium electrode storage solution. The filling solution composition can be adjusted to suit the sample requirements. ISEs respond selectively to ions in the presence of other ions, and they are commonly used for water testing and analyzing biological samples in hydroponics, aquaculture, and agriculture, 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.

What's in the Box?

• Thermo Scientific Orion 8611BNWP sodium ISE
• 50 mL bottle of ROSS sodium electrode filling solution
• 475mL bottle of sodium ionic strength adjustor (ISA)
• 475mL bottle of sodium known addition standard
• 475mL bottle of 1,000 ppm sodium standard with ISA
• 475mL bottle of 1,000 ppm sodium standard
• 475mL bottle of sodium reconditioning solution
• 475mL bottle of sodium electrode storage solution
• 1m cable