The Sensorex combination pH electrode with a flat surface sensor includes an adapter for attaching to pipe fittings to monitor pH in inline installations. The adapter has 3/4"male National Pipe Thread (NPT) threads for attaching to 3/4" female NPT pipe fittings and is made of 20% glass-filled polypropylene for rigidity and durability. The electrode's flat surface sensor resists becoming coated and is self-cleaning in turbulent environments. This combination electrode contains both the measuring half-cell and the reference half-cell to minimize electrostatic interference and provide consistent readings. The 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 organic compounds. Its chlorinated polyvinyl chloride (CPVC) body is heat resistant, has better corrosion resistance than PVC, and is sealed and filled with an electrolyte solution gel for minimal maintenance.

The electrode has a measurement range of 0 to 14 pH, and it withstands temperatures up to 75 degrees C (167 degrees F) at pressures up to 100 pounds per square inch gauge (psig) and temperatures up to 80 degrees C (176 degrees F) at pressures up to 85 psig. The electrode is 0.75" in diameter and 4.25" long, and has a 10-foot cable with a Bayonet Neill-Concelman (BNC) for attaching to meters with a BNC connection. pH electrodes measure the acidity or alkalinity of a substance and are commonly used by researchers, manufacturers, and hobbyists in hydroponics, aquaculture, agriculture, and wine-making, 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.

Sensorex manufactures pH, oxidation-reduction potential (ORP), and conductivity sensors, as well as other analytical sensors and accessories. The company, founded in 1972 and headquartered in Garden Grove, CA, meets International Organization for Standardization (ISO) standard 9001:2008, and is compliant to the European Union directives on Waste Electrical and Electronic Equipment Directive (WEEE) and Restriction of Hazardous Substances (RoHS).

What's in the Box?

• Sensorex S660CD pH electrode
• FC66P 3/4" NPT adapter
• S653/10/BNC cap/cable assembly