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Balun Technology Co., Ltd
Catalog excerpts
The BL618 Standard Platinum Resistance Thermometer (SPRT) is a precision instrument designed to measure temperature by detecting changes in electrical resistance in a platinum wire. It serves as the designated interpolation instrument for the International Temperature Scale of 1990 (ITS-90), operating between 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 SPRT's transfer function is based on electrical resistance as a function of temperature, making accurate resistance measurement against a fixed resistance base crucial for precise temperature readings. 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: Fully meets all ITS-90 requirements for temperature measurement accuracy Reference Thermometer: Ideal for precise temperature measurements in the range of 0℃ to 661℃ 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 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 BL618 Standard Platinum Resistance Thermometer Wooden carrying case for secure transport and storage OPTIONAL ACCESSORIES AND SERVCIES ■ ■ Readout Device (available upon request) Standard Platinum Resistance Thermometer (SPRT) 6 7 8 ≤ 0.5mk annual drift, ≤ 3mk stability ≤ 1mk annual drift, ≤ 4mk stability ≤ 3mk annual drift, ≤ 8mk stability 25 100
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