GS Yuasa Power Supply Ltd. Industry Business Unit Japan Storage Battery has developed the galvanic cell type oxygen sensor based on its technologies in fuel cells and lead-acid batteries. While the conventional galvanic cell type oxygen sensor was affected by CO2 and its life was short, because an aqueous solution of KOH was used as the electrolyte, our oxygen sensor using a weak acid electrolyte is not affected by any acidic gas and its life is 10 to 20 times as that of the conventional sensor. Therefore, our oxygen sensor will find new and wide range of applications. Medical Use / Anesthesia, Respirator, Oxygen concentrator Bio-Technology / Oxygen Incubator, Anaerobic Cultivator Food / Refrigerator, Vegetable Factory Home Security System / Air-Conditioning & Oxygen deficiency Alarm System, Fire Alarm System Measuring on industry / Exhaust gas, Combusion devices Extremely long life (5 to 10 years) No affection by carbon dioxide High stable output voltage No outside electric source for driving sensor Operative in the normal temperature No warming time Economical 1.A click familiarizes an expansion image with looking. Our oxygen sensor comprises a lead-oxygen battery consisted of a lead anode, an oxygen cathode made up of gold and a week acid electrolyte, as depicted in Fig.1. The gold electrode is bonded onto a non-porous Teflon FEP membrane. A small amount of oxygen permeating through the membrane is reduced electrochemically at the gold electrode. A resistance and a thermistor for temperature compensation are connected between the cathode and the anode and therefore, the lead-oxygen battery is always discharged. The current which flows through the resistance and the thermistor is proportional to the oxygen concentration (strictly speaking, Oxygen partial pressure) of the ambient atmosphere in contact with the Teflon FEP membrane. Therefore, by measuring the voltage between the ends of the resistance an Spec/Model KE-50 KE-25 Features Long life Quick response, high accuracy O2 Range 0-100% O2 0-100% O2 Accuracy ± 2% ± 1% Temperature Range 5-40 °C 5-40 °C 90% Response Time 60 seconds 12 seconds Life Expectancy 180 X 104%h (10 years in20°C Air) 90 X 104%h (5 years in20°C Air)       Spec/Model KE-12 SK-25 Features Very quick response Quick Response,high accuracy O2 Range 0-100% O2 0-30% O2 Accuracy ± 1% ± 1% Temperature Range 5-40 °C 5-40 °C 90% Response Time 5 seconds 15 seconds Life Expectancy 45 X 104%h (2.5 years in20°C Air) 45 X 104%h (2.5 years in20°C Air)         1.Viewpoint of sensor life The life expectancy of the oxygen sensor is expressed with the value of ( % of oxygen concentration)×(hr of time).Yet, it is in the case that a sensor used it under the regular conditions of 60% relative humidity, 1013hpa air pressure, and 20°C temperature. For example, a sensor of 10,000%h life expectancy has 100h life time during the 100% oxygen. 2.KE-12 model is the order received raw product.           [ KE-50 / KE-25 / KE-12 ] * Form can be changed according to a use. [SK-25]   << A click familiarizes an expansion image with looking. Catalog Download The files are in Adobe Acrobat Format. To view them you will need to download the Adobe Acrobat Reader Those who wish to have a Catalog need to click following this picture. * The contents of our cataloges may be changed without a preliminary announcement by specification change of our products etc. * Since you may be unable to purchase by the reason of having already stopped production about our product carried by our website, please approve beforehand. KE series Catalog(2.591KB) SK series Catalog(2.652KB)