{"product_id":"5640-series-thermistor-standards-probe","title":"5640 Series Thermistor Standards Probe","description":"\u003cp\u003e5640 temperature thermistor probes are affordable, accurate \u0026amp; provide great stability over wide range of temperature. Thermistor calibration traceable to NIST.\u003c\/p\u003e\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eEach 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.\u003c\/p\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003cp\u003ePrecision 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:\u003c\/p\u003e\u003cp\u003eR=exp(A + B\/T + C\/T2 + D\/T3)\u003c\/p\u003e\u003cp\u003eThe constants for the formula are obtained from a polynomial regression performed on the calibration data obtained. Over the range of 0 °C to 60 °C, thermistor calibration is performed at the triple point of water (0.01 °C) and 15 °C, 25 °C, 30 °C, 37 °C, 50 °C and 60 °C. For the 0 °C to 100 °C temperature range, the additional calibration points of 80 °C and 100 °C are used.\u003c\/p\u003e\u003cp\u003eEach temperature thermistor probe is individually calibrated and includes a report of calibration from the manufacturer. Contact Fluke Calibration for calibration in our accredited lab.\u003c\/p\u003e\u003cp\u003eThermistor standards are rugged, precision temperature sensors suitable for use as secondary or working temperature standards for laboratory metrology applications. Because they generally are not affected by shock and vibration, you can use them in the most difficult field environments without worrying about calibration integrity.\u003c\/p\u003e\u003cp\u003eCombine these thermistor probes with a 1560 Fluke Calibration Black Stack thermometer to read directly in °C, °F, or K. This combination gives you resolution of 0.0001 degrees and total system accuracy is better than ±0.004 °C.\u003c\/p\u003e\u003cp\u003eCompare the cost of a 5640 calibrated temperature thermistor probe and a Black Stack thermometer to the cost of one uncalibrated SPRT. Between 0 °C and 100 °C, nothing beats the value of the 5640 Series Thermistors.\u003c\/p\u003e\u003cdiv\u003eModels\u003cul\u003e\n\u003cli\u003e5640-X\u003c\/li\u003e\n\u003cli\u003e5641-X\u003c\/li\u003e\n\u003cli\u003e5642-X\u003c\/li\u003e\n\u003cli\u003e5643-X\u003c\/li\u003e\n\u003cli\u003e5644-X\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e“X” in a model number denotes the probe termination (e.g. A = INFO-CON for 914X, B = bare wire, D = 5-pin DIN, G = gold pins, J = banana plugs, L = mini spade lugs, M = mini banana plugs, P = INFO-CON for 1523\/1524, S = spade lugs). Please specify when enquiring.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eSpecifications: 5640 Series Thermistor Standards Probes\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003ctd colspan=\"8\"\u003e\u003cstrong\u003eThermistor Specifications \u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel \u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e Diameter x Length \u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e Range \u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eDrift\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e °C \/Year \u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eAccuracy (Mfr.)\u003csup\u003e†\u003c\/sup\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e 0–60 °C 60–100 °C \u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e Wires \u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eNominal Resistance\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eat 25 °C \u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5640 \u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6.35 x 229 mm\u003cbr\u003e(0.25 x 9 in)\u003c\/td\u003e\n\u003ctd\u003e0 °C–60 °C \u003c\/td\u003e\n\u003ctd\u003e± 0.005 °C \u003c\/td\u003e\n\u003ctd\u003e± 0.0015 °C \u003c\/td\u003e\n\u003ctd\u003en\/a \u003c\/td\u003e\n\u003ctd\u003e4 \u003c\/td\u003e\n\u003ctd\u003e4.4 kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5641 \u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.18 x 114 mm\u003cbr\u003e(0.125 x 4.5 in)\u003c\/td\u003e\n\u003ctd\u003e0 °C–60 °C \u003c\/td\u003e\n\u003ctd\u003e± 0.002 °C \u003c\/td\u003e\n\u003ctd\u003e± 0.001 °C \u003c\/td\u003e\n\u003ctd\u003en\/a \u003c\/td\u003e\n\u003ctd\u003e4 \u003c\/td\u003e\n\u003ctd\u003e5 kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5642 \u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.18 x 229 mm\u003cbr\u003e(0.125 x 9 in)\u003c\/td\u003e\n\u003ctd\u003e0 °C–60 °C \u003c\/td\u003e\n\u003ctd\u003e± 0.002 °C \u003c\/td\u003e\n\u003ctd\u003e± 0.001 °C \u003c\/td\u003e\n\u003ctd\u003en\/a \u003c\/td\u003e\n\u003ctd\u003e4 \u003c\/td\u003e\n\u003ctd\u003e4 kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5643 \u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.18 x 114 mm\u003cbr\u003e(0.125 x 4.5 in)\u003c\/td\u003e\n\u003ctd\u003e0 °C–100 °C \u003c\/td\u003e\n\u003ctd\u003e± 0.005 °C \u003c\/td\u003e\n\u003ctd\u003e± 0.0015 °C \u003c\/td\u003e\n\u003ctd\u003e± 0.0025 °C \u003c\/td\u003e\n\u003ctd\u003e4 \u003c\/td\u003e\n\u003ctd\u003e7.5 kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5644 \u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.18 x 229 mm\u003cbr\u003e(0.125 x 9 in)\u003c\/td\u003e\n\u003ctd\u003e0 °C–100 °C \u003c\/td\u003e\n\u003ctd\u003e± 0.005 °C \u003c\/td\u003e\n\u003ctd\u003e± 0.0015 °C \u003c\/td\u003e\n\u003ctd\u003e± 0.0025 °C \u003c\/td\u003e\n\u003ctd\u003e4 \u003c\/td\u003e\n\u003ctd\u003e7.5 kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"8\"\u003e\n\u003csup\u003e†\u003c\/sup\u003eDoes not include long-term drift, resistance traceability adds additional ± 0.0025 %. \u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdiv role=\"tabpanel\" aria-labelledby=\"models-label\" class=\"tab-pane\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Fluke","offers":[{"title":"5640-X","offer_id":54038945956134,"sku":"5640-X","price":0.0,"currency_code":"HKD","in_stock":true},{"title":"5641-X","offer_id":54038946021670,"sku":"5641-X","price":0.0,"currency_code":"HKD","in_stock":true},{"title":"5642-X","offer_id":54038946054438,"sku":"5642-X","price":0.0,"currency_code":"HKD","in_stock":true},{"title":"5643-X","offer_id":54038946087206,"sku":"5643-X","price":0.0,"currency_code":"HKD","in_stock":true},{"title":"5644-X","offer_id":54038946119974,"sku":"5644-X","price":0.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/9797\/0214\/files\/ca7a7c92-64b2-43ab-b2f6-b308011f9f19_original__size.jpg?v=1791381038","url":"https:\/\/nplab.shop\/products\/5640-series-thermistor-standards-probe","provider":"NP LAB","version":"1.0","type":"link"}