{"product_id":"5699-high-temperature-metal-sheath-sprt","title":"5699 High-Temperature Metal-Sheath SPRT","description":"\u003cp\u003eFluke Calibration's 5699 SPRT has a protective sheathing material that allows use in calibration furnaces or calibration baths with high temperatures of up to 670 °C.\u003c\/p\u003e\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eDesigned and manufactured by our primary standards metrologists, the strain-free sensing element in the 5699 meets all ITS-90 requirements for SPRTs and minimizes long-term drift.\u003c\/p\u003e\u003cp\u003eAfter one year of regular usage, drift is less than 0.008 °C (\u0026lt; 0.003 °C is typical). Even lower drift rates are possible depending on care and handling. A fifth wire for grounding is added to the four-wire sensor to help reduce electrical noise, particularly for AC measurements. Finally, you can get an improved version of an old industry-standard Inconel-sheathed SPRT.\u003c\/p\u003e\u003cp\u003eThe 5699 is constructed with a 0.219-inch-diameter Inconel sheath for high durability and fast response times. Inside the sheath, the sensing element is protected by a thin platinum housing that shields the sensor from contamination from free-floating metal ions found within metal environments at high temperatures. Reduced contamination means a low drift rate—even after hours of use in metal-block furnaces at high temperatures.\u003c\/p\u003e\u003cp\u003eIf you choose not to calibrate the 5699 yourself, a wide variety of options are available from Fluke Calibration’s own primary standards laboratory, including fixed-point calibrations covering any range between –200 °C and 661 °C.\u003c\/p\u003e\u003cp\u003eAt Fluke Calibration, we use SPRTs every day. We design them, build them, calibrate them, use them as standards, and know what it takes to make a reliably performing instrument. Why buy from anyone else?\u003c\/p\u003e\u003cp\u003ePlease note that the Fluke 5699 does not come calibrated with accreditation by default. If calibration is required, we recommend reaching out directly to Fluke Corporation or contacting your local Fluke representative to arrange for the specific accreditation needed across your desired temperature ranges.\u003c\/p\u003e\u003cdiv\u003eModels\u003cul\u003e\u003cli\u003e5699-S\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch2\u003eSpecifications: 5699 High-Temperature Metal-Sheath SPRT\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003eSpecifications\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e–200 °C to 661 °C (recommended annealing temperature \u003cbr\u003e665 °C) \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal RTPW\u003c\/td\u003e\n\u003ctd\u003e25.5Ω (± 0.5Ω)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\u003ctd\u003e1 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResistance Ratio\u003c\/td\u003e\n\u003ctd\u003eW(302.9146 K) ≥ 1.11807\u003cbr\u003eW(234.3156 K) ≤ 0.844235\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitivity\u003c\/td\u003e\n\u003ctd\u003e0.1 Ω\/ °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrift Rate\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.008 °C\/year (\u0026lt; 0.003 °C\/year typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRepeatability\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 1 mK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelf-heating at TPW\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.001 °C under 1 mA current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReproducibility\u003c\/td\u003e\n\u003ctd\u003e± 0.001 °C or better\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRTPW Drift After Thermal Cycling\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.001 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter of Pt Sensor Wire\u003c\/td\u003e\n\u003ctd\u003e0.07 mm (0.003 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLead Wires\u003c\/td\u003e\n\u003ctd\u003eFour sensor wires plus grounding wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtective Sheath\u003c\/td\u003e\n\u003ctd\u003eInconel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter:\u003c\/td\u003e\n\u003ctd\u003e5.56 mm ± 0.13 mm (0.219 in ± 0.005 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength:\u003c\/td\u003e\n\u003ctd\u003e482 mm (19 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulation Resistance\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 100 MΩ at 661 °C\u003cbr\u003e\u0026gt; 1000 MΩ at 20 °C\u003c\/td\u003e\n\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":"5699-S","offer_id":54038946971942,"sku":"5699-S","price":0.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/9797\/0214\/files\/40c095b4-9acb-4303-8856-b308010c6945_original__size.jpg?v=1791381079","url":"https:\/\/nplab.shop\/products\/5699-high-temperature-metal-sheath-sprt","provider":"NP LAB","version":"1.0","type":"link"}