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Platinum thermal resistance temp. sensor

A temperature sensor, platinum thermal resistance technology, used in thermometers, thermometers and instruments with directly sensitive electrical/magnetic components, etc., can solve the problems of corrosion resistance, volume increase, thermal inertia and measurement accuracy, and reduce Production cost, product life extension, volume reduction effect

Inactive Publication Date: 2003-03-26
上海浦东新区台华仪电科技研究所
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a platinum thermal resistance temperature sensor to solve the problems of corrosion resistance, volume increase, thermal inertia and measurement accuracy of temperature measurement in acid solution in the prior art.

Method used

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Embodiment Construction

[0017] From figure 1 It can be seen that the present invention is composed of a polytetrafluoroethylene sleeve 2, a platinum thermal resistance 3, a heat shrinkable tube 4, and a lug 5; wherein the platinum thermal resistance 3 is connected to the lug 5 through the heat shrinkable tube 4 through a wire, and the platinum thermal resistance Resistor 3, wire and heat shrinkable tube 4 are covered with polytetrafluoroethylene sleeve 2, platinum thermal resistance 3 is close to the tube wall of polytetrafluoroethylene sleeve 2 and the inner wall of PTFE sleeve bottom cover 1, heat shrinkable tube The outer wall of 4 is socketed with the tube wall of polytetrafluoroethylene sleeve 2.

[0018] The key process of the present invention is the welding back cover of the polytetrafluoroethylene casing, which requires absolutely tight and no gaps at the welding place, and it can perform temperature measurement operations in corrosive liquids or gases exceeding 250 degrees Celsius under nor...

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Abstract

This invention relates to a sensor for testing temperature according to the law of conductor resistance varing along with the of temperature which comprises a Teflon jacket tube, a Pt thermal resistor, a pyrocondensate tube, wiring plate in which the Pt thermal resistor ic onnected with the wiring plate via conducting wire passing through the pyrocondensate tube the Pt thermal resistor, the conducting wire and pyrocondensate tube are sleeved with Teflon jacket tubes, the Pt thermal resister is close to tube wall and inside wall of sealing bottom of the Teflon, the outer wall of the pyrocondensate tube is sleeved with the wall of the Teflon jacket mainly used in testing temperature in aid solution above 250 deg.C.

Description

technical field [0001] The invention relates to an instrument for temperature measurement and control, in particular to a temperature sensor for measuring temperature according to the change law of conductor resistance with temperature. Background technique [0002] The most commonly used resistance thermometers use temperature-sensing elements wound with metal wires. There are mainly platinum resistance thermometers and copper resistance thermometers. Precision platinum resistance thermometers are currently the most accurate thermometers. Existing platinum thermal resistance temperature sensors generally use metal materials as outer protection tubes, and metal materials are often made of stainless steel, but in general acid liquids, their corrosion resistance is very poor, so the temperature is measured in an acidic environment higher than 250 degrees Celsius. A polytetrafluoroethylene sleeve is often placed outside the stainless steel protection tube. Although this solves...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/18
Inventor 刘家相
Owner 上海浦东新区台华仪电科技研究所
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