Negative temperature coefficient (NTC) temperature sensor

A temperature sensor, high temperature technology, used in thermometers, instruments, scientific instruments, etc., can solve the problem of sensitivity difficult to meet market requirements, and achieve the effect of considerable production capacity, reasonable shape and structure design, and improved service life.

Inactive Publication Date: 2012-09-19
JURONG BOYUAN ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The response time can also be 5~15 seconds, but its sensitivity is still difficult to meet market requirements,

Method used

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  • Negative temperature coefficient (NTC) temperature sensor
  • Negative temperature coefficient (NTC) temperature sensor
  • Negative temperature coefficient (NTC) temperature sensor

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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with embodiment. It should be pointed out that those skilled in the art can make some improvements without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

[0015] Such as figure 2 As shown, a kind of NTC temperature sensor comprises silica gel wire 5, NTC thermistor 1, and the end of silica gel wire 5 is welded together with NTC thermistor 1; Part of the outside is sealed with a high-temperature encapsulating adhesive layer 2 with an encapsulating length of 15 mm, and a high-temperature encapsulating adhesive layer 4 is covered outside the high-temperature encapsulating adhesive layer 2, and a casing 3 is covered outside the high-temperature encapsulating adhesive layer 4 . Shell 3 uses bullet-type stainless steel shell 3 and its head is put into special material. The high-temperature ...

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Abstract

The invention discloses a negative temperature coefficient (NTC) temperature sensor which comprises a silica gel lead and an NTC thermistor. The end of the silica gel lead is welded to the NTC thermistor, a high temperature encapsulating rubber layer is encapsulated on the outer side of the NTC thermistor and the outer side of an exposed portion of the silica gel lead, and a high temperature potting rubber layer and a casing are sequentially wrapped on the outer side of the high temperature encapsulating rubber layer. The NTC temperature sensor has great breakthrough in NTC thermistor response time, the response time is controlled within one second, and reliability and repeatability are verified through long-term experiments. In addition, the NTC temperature sensor has high dielectric strength and can sustain 1 minute without breakdown under the voltage of 3000VAC. The NTC temperature sensor is firm, durable and stable and reliable in performance, can greatly improve service life, is installed conveniently for remote temperature measurement and control, meets requirements of industries such as food equipment and military equipment which have high requirements on temperature variation to a great extend, and fills market vacancy.

Description

technical field [0001] The invention relates to a temperature sensor, in particular to a high-sensitivity NTC temperature sensor. Background technique [0002] The response time of the NTC thermistor is the same as the thermal time constant, which is an important technical parameter indicating the sensitivity of the NTC thermistor. The difference is that the definition and test method are different. Test method: When the ambient temperature of the thermistor changes sharply, the thermistor quickly moves to a constant temperature high temperature oil tank with a temperature of 85 °C after reaching the nominal resistance value in a constant temperature low temperature oil tank with a temperature of 25 °C. In this way, the time required for the resistance value (Rt) to change by 63% from the initial temperature of 25°C to the final temperature of 85°C is called the response time. Its calculation method: [(R25-Rs) / (R25-R85)]*100%≥63%. The relationship between the elapsed time ...

Claims

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Application Information

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IPC IPC(8): G01K7/22
Inventor 王梅凤
Owner JURONG BOYUAN ELECTRONICS
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