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C-2500 HTS高温传导系统
C-2500 HTS高温传导系统
订货号: MM-37517-00
产地: 美国
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开发编号: N
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产品描述:

The Model C-2500-HTS Thermal Conductivity system is designed for measureing the thermal
conductivities of highly conducting materials from room temperatures to 1000
 
SPECIFICATIONS
Conductivity Range:
0.02 to 50 BTU/hr.ft. F
Temperature Range:
R.T. to 1000 C
Accuracy:
+/- 5%
Sensing Surfaces:
Nickle alloys/air cooling. Interface thermal
resistance correction curve supplied
Calibration:
ASTM C177-76
Heat Guard:
Automatic
Readout In Following Units:
Sample Heat Flux....BTU/hr.ft. (Dual Readouts)
Sample Ambient Temperature.......................... F
Sample Temperature Difference....................... F
 
THE HIGH TEMPERATURE, THERMAL
CONDUCTIVITY MEASUREMENT
TECHNIQUE
The contact(sensing) surfaces of the high temperature conductivity system are composed of traceable Alumel, whose thermoelectric and physical properties are known.
 
A disc of Chromel, whose properties are also known as a function of temperature, is placed in thermal, and electrical contact between the Alumel surfaces. At a constant heat flow, a temperature difference will be established across the Chromel disc, consequently, a thermoelectric voltage will be generated between the Alumel surfaces. This voltage is directly related to the heat flux through the Alumel surface Two such heat flux sensors encompass the sample to be measured, thus, the heat flux entering the sample can be averaged with the heat flux exiting the sample. The values so obtained obviate the necessity for guarded hot plates,
thus yielding greater accuracy
 
The temperature difference across the sample is sensed with two Type “K” Chromel/Alumel thermocouple discs which provide an average value over the entire sample surface.
 
When measuring highly conducting samples, the interface resistances between the sample surfaces and the sensing surfaces can be greater than the innate thermal resistance of the sample. A special technique has been developed to determine the actual surface temperatures of the sample and may be applied not only to high temperature conductivity measurements, but also to low temperature measurements.


品牌简介

美国International Thermal Instrument Company(ITI)国际热设备公司成立于1969年,旨在探索应用热电感应、热导率、热通量、地热能。在过去的30年里,国际热设备公司提供OE…美国International Thermal Instrument Company(ITI)国际热设备公司成立于1969年,旨在探索应用热电感应、热导率、热通量、地热能。在过去的30年里,国际热设备公司提供OEM服务和定制热电传感仪器于无数美国和外国国家实验室、美国国家航空和宇宙航行局、国家标准与技术局和许多私人和国立大学。产品广泛应用于暖气和空调、石油、化工、核能和发电等行业。

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