NTC thermistor 564 series

High accuracy temperature thermistor probes with excellent stability • Accuracy to ± 0.001 °C • Affordable system accuracy to ± 0.004 °C or better • NIST-traceable calibration included from manufacturer; accredited calibration from Fluke Calibration optional If you want a high-accuracy temperature thermistor probe with excellent stability at a great price, the Model 5640 series Thermistor Standards Probes give you all three in a great package. Why pay for an SPRT when you can get ±0.001 °C accuracy from 0 °C to 60 °C in a calibrated thermistor probe for about one-third the cost of an uncalibrated SPRT alone? Each temperature thermistor probe uses an ultra-stable glass thermistor enclosed in a thin-wall stainless steel tube. The basic semiconductor element is a bead of manganese, nickel, and cobalt oxides mounted on 0.1 mm platinum wires. For long-term stability, the thermistor is aged at various temperatures for 16 weeks. During the aging process, verification of the probe’s stability is done to ensure performance to published specs. The 5640, 5641, and 5642 thermistor probes are designed for the temperature range of 0 °C to 60 °C. The 5643 and 5644 probes span the 0 °C to 100 °C temperature range. They offer stability of either ±0.002 °C or ±0.005 °C. These stability levels are guaranteed for one full year. Precision thermistor calibration, traceable to NIST, is provided with each temperature probe. A computer-generated table in increments of 0.01 °C is furnished with each calibration based on the formula: R=exp(A + B/T + C/T2 + D/T3) The constants for the formula are obtained from a polynomial regression performed on the calibration data obtained.