Milwaukee SE220 Replaceable Double Junction pH Probe with 1 Meter Cable and KCL Gel Filled

The Milwaukee combination electrode has a double-junction reference to protect against silver wire contamination and to help prevent clogging 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. Its epoxy body is impact resistant, durable, and sealed and filled with an electrolyte solution gel for minimal maintenance.

It is available in both pH and ORP models. The pH model has a measurement range of 0.00 to 14.00 pH. The oxidation reduction potential (ORP) model has a platinum sensor for measuring dissolved oxygen in aqueous solutions and a measurement range of +/-2,000 mV. It withstands temperatures from 0 to 70 degrees C (32 to 158 degrees F). The electrode is 12mm in diameter and 120mm long, and has a 1m cable with a Bayonet Neill-Concelman (BNC) connector for attaching to meters with a BNC connection. pH electrodes measure the acidity or alkalinity of a substance. ORP electrodes, also known as redox electrode, measure the ability of aqueous solutions to act as oxidizing or reducing agents. Both pH and ORP electrodes 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.

Milwaukee Instruments manufactures electrochemical instrumentation and solutions for water analysis under the Milwaukee and Martini brands. The company, founded in 1998, is headquartered in Rocky Mount, NC.

What's in the Box?

• Milwaukee electrode
• 1m cable