Traceability Standard Sensors R800 Series Standard Platinum Resistance Thermometers     The R800 series standard platinum resistance thermometers conforming to the International Temperature Scale, 1990 (ITS-90) have been commercialized under the guidance of the National Research Laboratory of Metrology.   Features The thermometers cover from vapor point of helium to freezing point of silver. Various models are prepared for low temperature and high temperature. Fixed point calibration and precision comparison calibration are available. Models Models Types R800-0 Standard platinum resistance thermometer for low temperature R800-2 Standard platinum resistance thermometer for medium temperature R800-3 Standard platinum resistance thermometer for high temperature R800-3L Low resistance type standard platinum resistance thermometer for high temperature R800-9 Standard platinum resistance thermometer R800-4 Platinum-Cobalt resistance thermometer for cryogenic temperature Specifications Model R800-0 R800-2 R800-3 R800-3L R800-9 R800-4 Measuring range 13K to 30°C 90K to 661°C 0°C to 962°C 90K to 300°C 4K to 0°C Resistance value (at 0°C) 2.55±1 2.55±0.1 0.25± 0.01 100± 1 100± 4 Measuring current 1mA 1 to 10mA 1mA Temperature characteristic R(-38.8344°C)/ R(0.01°C) 0.844235 R(29.7646°C)/ R(0.01°C) 0.844235 R(29.7646°C)/R(0.01°C) 1.11807 and R(961.78°C)/R(0.01°C) 4.2844 R(100°C)/ R(0°C) 1.3920 -- Sensitivity 0.1/K 0.01/K 1m/K 0.4/K Min. 0.09/K (at 12K) Max. 0.40/K Sealed gas Helium gas Mixture gas (argon and oxygen) Helium gas Connecting lead wire 4-conductor type platinum wire 0.3mm x 35mm 4-conductor type cabtyre cord 2m with gold plated 4-conductor type platinum wire 0.3mm x 35mm Frame Cross quartz Cross mica Cross quartz Protection tube Capsule type platinum sheath 5mm x 43mm Delustered quartz tube (7.0 ± 0.5mm x 600mm Delustered quartz tube (7.0 ± 0.5mm x 700mm Delustered quartz tube (7.0 ± 0.5mm x 600mm Capsule type platinum sheath 5mm x 43mm *PDF data sheet is available at "Download Center". Page Top BACK