{"id":67,"date":"2018-08-13T17:38:50","date_gmt":"2018-08-13T09:38:50","guid":{"rendered":"https:\/\/www.bihec.com\/asb\/?p=67"},"modified":"2018-08-13T17:39:23","modified_gmt":"2018-08-13T09:39:23","slug":"thermocouples-and-rtd-%e7%83%ad%e7%94%b5%e5%81%b6","status":"publish","type":"post","link":"https:\/\/www.bihec.com\/asb\/thermocouples-and-rtd-%e7%83%ad%e7%94%b5%e5%81%b6\/","title":{"rendered":"Thermocouples and RTD \u70ed\u7535\u5076"},"content":{"rendered":"

<\/p>\n

Thermocouples
\nA thermocouple is a sensor for measuring temperature. It consists of two dissimilar metals, joined together at one end. When the junction of the two metals is heated or cooled a voltage is produced that can interpreted by a temperature controller, high limit or display device. There are two common constructions for these: Tube and Wire and Mineral Insulated. The tube and wire uses an empty stainless tube with a wire inside which has a welded tip incorporating the wire junction. This construction is typically used to 900?F. The Mineral Insulated construction uses a highly compacted stainless sheath with solid conductors encased in magnesium oxide insulation. This construction offers a wider variety of diameters, allows for the sensors to be bent in the field and for temperatures to 2200?F. These sensors are available is a huge range of physical packages with a variety of lead wire, housing, and mounting options.
\n\u70ed\u7535\u5076
\n\u70ed\u7535\u5076\u662f\u6d4b\u91cf\u6e29\u5ea6\u7684\u4f20\u611f\u5668\u3002\u5b83\u7531\u4e24\u79cd\u4e0d\u540c\u7684\u91d1\u5c5e\u7ec4\u6210, \u4e00\u7aef\u8fde\u63a5\u5728\u4e00\u8d77\u3002\u5f53\u4e24\u4e2a\u91d1\u5c5e\u7684\u8fde\u63a5\u88ab\u52a0\u70ed\u6216\u51b7\u5374\u65f6, \u4ea7\u751f\u7684\u7535\u538b\u53ef\u4ee5\u7531\u6e29\u5ea6\u63a7\u5236\u5668\u3001\u9ad8\u9650\u5236\u6216\u663e\u793a\u88c5\u7f6e\u89e3\u91ca\u3002\u6709\u4e24\u4e2a\u5171\u540c\u7684\u7ed3\u6784\u4e3a\u8fd9\u4e9b: \u7ba1\u5b50\u548c\u5bfc\u7ebf\u548c\u77ff\u7269\u7edd\u7f18\u3002\u7ba1\u5b50\u548c\u5bfc\u7ebf\u4f7f\u7528\u4e00\u4e2a\u7a7a\u7684\u4e0d\u9508\u94a2\u7ba1\u4e0e\u5bfc\u7ebf\u91cc\u9762\u6709\u4e00\u4e2a\u710a\u63a5\u7684\u5c16\u7aef\u5305\u542b\u5bfc\u7ebf\u8fde\u63a5\u3002\u8fd9\u79cd\u7ed3\u6784\u901a\u5e38\u7528\u4e8e900\uff1ff. \u77ff\u7269\u7edd\u7f18\u7ed3\u6784\u91c7\u7528\u9ad8\u5ea6\u81f4\u5bc6\u7684\u4e0d\u9508\u94a2\u62a4\u5957, \u5e76\u5c06\u56fa\u4f53\u5bfc\u4f53\u5305\u88f9\u5728\u6c27\u5316\u9541\u7edd\u7f18\u4e2d\u3002\u8fd9\u79cd\u7ed3\u6784\u63d0\u4f9b\u4e86\u66f4\u5e7f\u6cdb\u7684\u76f4\u5f84, \u5141\u8bb8\u4f20\u611f\u5668\u5728\u73b0\u573a\u5f2f\u66f2\u548c\u6e29\u5ea6\u4e3a2200\uff1ff. \u8fd9\u4e9b\u4f20\u611f\u5668\u662f\u4e00\u4e2a\u5de8\u5927\u7684\u4e00\u7cfb\u5217\u7684\u7269\u7406\u5c01\u88c5\u4e0e\u5404\u79cd\u5f15\u7ebf, \u4f4f\u623f\u548c\u5b89\u88c5\u9009\u9879<\/p>\n

RTD’s Resistance Temperature Detectors
\n(RTDs) are temperature sensors that contain a resistor that changes resistance value as its temperature changes. RTDs are also available in a Tube and Wire and Mineral Insulated construction. They are more accurate than thermocouples and are typically used for temperature sensitive and laboratory applications. We offer these in a variety of constructions and physical packages but are constrained by the size of the resistor beads. There are restrictions to the diameter and lengths of the available constructions<\/p>\n

\u7535\u963b\u6e29\u5ea6\u63a2\u6d4b\u5668
\n(RTDs) \u662f\u6e29\u5ea6\u4f20\u611f\u5668, \u5176\u4e2d\u5305\u542b\u7535\u963b\u503c, \u968f\u7740\u6e29\u5ea6\u7684\u53d8\u5316\u800c\u53d8\u5316\u3002RTDs \u4e5f\u53ef\u5728\u7ba1\u9053\u3001\u7535\u7ebf\u548c\u77ff\u7269\u7edd\u7f18\u7ed3\u6784\u4e2d\u4f7f\u7528\u3002\u5b83\u4eec\u6bd4\u70ed\u7535\u5076\u66f4\u51c6\u786e, \u901a\u5e38\u7528\u4e8e\u6e29\u5ea6\u654f\u611f\u548c\u5b9e\u9a8c\u5ba4\u5e94\u7528\u3002\u6211\u4eec\u63d0\u4f9b\u8fd9\u4e9b\u5728\u5404\u79cd\u7ed3\u6784\u548c\u7269\u7406\u5305, \u4f46\u53d7\u5230\u9650\u5236\u7684\u5927\u5c0f\u7684\u7535\u963b\u73e0\u3002\u6709\u5bf9\u73b0\u6709\u7684\u7ed3\u6784\u7684\u76f4\u5f84\u548c\u957f\u5ea6\u7684\u5236\u7ea6<\/p>\n

 <\/p>\n

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Thermocouples A thermocouple is a sensor for measuring temperature. 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