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Traceability   C800 Series R800 Series IR-RST Series IR-R0 Series IR-R0 (6, 7, 8) IR-R0 (24, 26, 27)    Type   Standard Sensors Standard IR Thermometers Blackbody Furnaces     R800 Series Standard 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 Models 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