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Balun Technology Co., Ltd
Catalog excerpts
The BL617 Standard Platinum Resistance Thermometer (SPRT) is an advanced device used for measuring temperature through the change in electrical resistance of a platinum wire. The SPRT serves as the primary interpolation instrument for the International Temperature Scale of 1990 (ITS-90), operating within the defined fixed points, from 13.8033 K (the triple point of equilibrium hydrogen, equivalent to -259.3467°C) to 961.78°C (the freezing point of silver). The performance of the SPRT is based on the precise measurement of electrical resistance as a function of temperature, necessitating accurate resistance measurements relative to a fixed resistance standard. Temperature Range: -189.3442℃ to 419.527℃ Fused Quartz Sheathed: Provides durability and protection Resistance Values: W(Ga) ≥ 1.11807W(Ga) \geq 1.11807W(Ga) ≥ 1.11807 W(Hg) ≤ 0.844235W(Hg) \leq 0.844235W(Hg) ≤ 0.844235 Resistance at 0℃ (Rtpw): Available in 25Ω or 100Ω Compliance: Meets all ITS-90 requirements for high accuracy Part Number Temperature Range Rtpw Resistance ratio Measurement Current Annual drift @0.01℃ Stability Self-heating Platinum diameter Sensor length Sensor material Head diameter Head length Sheath diameter Sheath length Sheath material Insulation Resistance Characterizations Cable Connection leads Gas in sheath BL617 Standard Platinum Resistance Thermometer Wooden carrying case for secure transport and storage OPTIONAL ACCESSORIES AND SERVCIES ■ ■ Readout Device (available upon request) Reference Thermometer: Ideal for highly accurate temperature measurements in the range of -189℃ to +420℃ Comparative Calibration: Suitable for use in tube furnaces and liquid baths within the same temperature range Balun Technology Co., Ltd Add: 1322, F/3, Bldg 1, 33 Zique Rd, Haidian, Beijing100095, China Standard Platinum Resistance Thermometer (SPRT) 10 1 ≤ 0.5mk annual drift, Quartz sheath ≤ 1mk annual drift, Quartz sheath ≤ 3mk annual drift (Metal sheath) ≤ 3mk annual drift, Quartz sheath 25 100
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