From patented glass contact thermometersto analytical measurement technology

JUMO's success story is closely linked to glass technology. It began in 1907 with Hermann Juchheim, father of Moritz Juchheim, the founder of the present company M. K. JUCHHEIM GmbH & Co KG. The Gebrüder Juchheim (Juchheim Bros.) company was established back in 1934, in Ilmenau in Thuringia, and manufactured glass industrial thermometers. Since 1947, laboratory and industrial thermometers have been produced at a new location, Fulda, in Hesse (Germany), under the JUMO brand name. In the seventies, on the basis of these experiences in working with glass as a material, JUMO started to produce glass parts for electrochemical sensors for pH value, redox potential, conductivity and temperature. The modern- day JUMO Analytical Measurement product line emerged from these beginnings. Since then, production of pH and redox electrodes has out- stripped the success of the glass thermometer. Today, JUMO is one of the largest manufacturers of electrochemical sensors in Europe. Many customers purchase their electrodes from JUMO marked with their own company logo – the production of such OEM versions and special styles is one of our strengths. As well as the pH and redox electrodes, we also manufacture the neces-sary protection fittings, electronic instrument amplifiers and controllers. Measuring cells for electrolytic conductivity, dissolved oxygen, chlorine, chlorine dioxide, and a patented hydrogen peroxide sensor round off the product spectrum. Nowadays, the manufacture of electrochemical sensors is carried out insemi-automated and fully-automated production stages. As a result, a consistently high quality is achieved. In addition, computer-aided measurement stations, e.g. during the final inspection, ensure that quality- related parameters are maintained. Each individual JUMO industrial electrode is therefore routinely tested before dispatch. Experienced staff in the glass- blowing shop produce items ranging from individual sensors to mass production runs in many different styles, for almost all conceivable applications. Right from the start, the important thing was obtaining the expertise inmembrane glasses. These “recipes” are an essential component of a top- quality ph electrode. Today, JUMO can supply pH membrane glasses for the widest possible range of applications, based on their own internal research. However, the other components of a pH and redox electrode also have to be optimized for the corresponding application. Liquid, high- viscosity reference electrolyte and high-temperature gels up to 135°C with a cartridge system ensure a stable reference voltage; this is a guarantee for reproducible values with potentiometric measurements.JUMO pH and redox electrodes are used in almost all sectors: drinkingwater and swimming pool water, urban and industrial waste water, neutralization plants, final inspection, chemical industry, process and rinsing water, food technology, laboratory measurement, biotechnology and aquaria.