PLATINUM/COBALT RESISTANCE THERMOMETER FOR INDUSTRIAL USE MODEL R800-6 (4K to 375K) R800-7 (15K to 375K) The Platinum/Cobalt resistance thermometer is the temperature sensor for cryogenic temperature by utilizing Platinum/Cobalt thin alloy in the sensing part, and is for the temperature measurement from cryogenic temperature area to room temperature. The Platinum/Cobalt thin alloy is Platinum alloyed with trace amounts of Cobalt, and has superior characteristics as a cryogenic temperature sensor because its resistance value and sensitivity in cryogenic temperature range are far bigger than precious metals like as Platinum. Two kinds of thermometers, R800-6 up to 4K and R800-7 up to 15K, are available. O The temperature from the cryogenic temperature (R800-6 4K, R800-7 15K) to the room temperature (300K) can be measured by a single sensor. O The accuracy in the whole measuring range is high (±0.5K) and the sensor is interchangeable. O The thin capsule metal type durable construction offers low heat capacity and excellent stability. O Due to 4-wire type, precision measurement by a DC potentiometer can be executed. TExternal Dimensions TGeneral Specifications Measuring element: Platinum/Cobalt thin alloy Measuring temperature: 4K to 375K (R800-6) 15K to 375K (R800-7) Resistance value at 0ºC: 100Ω ± 0.15Ω Sensitivity: Min. 0.09Ω/K at 12K Max. 0.40Ω/K Repeatability: Within 10mK Nominal current: 2mA Self-heat characteristic: 4mK/1mA (in LN2) Temperature measurement construction: Spiral coil type aluminum ceramic construction Protective tube: Capsule type brass with gold plated Ø2.0mm x L23mm Lead wire: 4-wire type, Polyester covered copper wire Ø0.2m x L1000mm Response time: 5 seconds at 90% response (0ºC → Liquid oxygen) Protective tube Brass with gold plated Copper wire covered by polyester (Ø0.2) Filled with Stycast for low temp

TTemperature – Resistance Characteristics TTemperature – Sensitivity Characteristics TTemperature – Resistance Value Table Temperature (K) Specifications subject to change without notice. 32-8, KUMANO-CHO, ITABASHI-KU, TOKYO 173-8632 PHONE: +81-3-3956-2171 FAX: +81-3-3956-0915 E-mail: [email protected] Website: http://www.chino.co.jp