High-molecular PTC temperature sensor

Abstract

The invention belongs to the technical field of a sensor, and particularly to a high-molecular PTC temperature sensor. The high-molecular PTC temperature sensor comprises a pin, a buffer rubber plate,a metal wire, a positioning hole, a first connecting plate, a connecting sleeve, a sensor outer film, a heat insulating housing, a sealing connecting pipe, a heat sensing copper plate, a temperaturesensing probe, a connecting ring, a second connecting plate, a rubber connecting rod, a rubber bonding plate and a silica gel connecting pipe. According to the high-molecular PTC temperature sensor, through respectively arranging the first connecting plate and the second connecting plate at two sides of the connecting sleeve, the distance between two temperature sensors can be limited through thefirst connecting plate and the second connecting plate which are connected with two adjacent temperature sensors when a plurality of temperature sensors are serially connected in use, thereby preventing temperature detecting effect reduction caused by oversmall sensor distance caused by long-time equipment vibration, and facilitating integral serial fixed mounting of the plurality of temperature sensors.

Description

Technical field [0001] The invention belongs to the technical field of sensors, and specifically is a polymer PTC temperature sensor. Background technique [0002] The PTC temperature sensor is actually a thermistor with a positive temperature coefficient. The resistance changes in proportion to the temperature. The two wires can be connected to the signal input at will. The thermistor is made of semiconductor materials, mostly with a negative temperature coefficient, that is, the resistance value. Decrease with temperature increase, temperature change will cause a large resistance change, so it is the most sensitive temperature sensor, but the linearity of the thermistor is extremely poor, and has a lot to do with the production process, the manufacturer can not give standardization The thermistor curve. [0003] Existing polymer PCT sensors generally require multiple sensors to be connected in series to monitor an area. Due to the large vibration or movement in the operating env...

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Problems solved by technology

[0002] The PTC temperature sensor is actually a thermistor with a positive temperature coefficient. The resistance value changes proportionally with the temperature. The two wires can be connected to the signal input terminal arbitrarily. The thermistor is made of semiconductor materials, and most of them have a negative temperature coefficient, that is, the resistance value. As the temperature increases, it decreases, and the temperature change will cause a large change in resistance value, so it is the most sensitive temperature sensor, but the linearity of the thermistor is extremely poor, and it has a lot to do with the production process, and the manufacturer cannot give a standardization The thermistor curve of

[0003] Existing polymer PCT sensors generally require multiple sensors to be connected in series to monitor an area. Due to the large vibration or movement of some machines, it is easy to cause the distance between different sensors to be difficult to fix, thus The temperature monitoring effect is affected, and the vibration environment is easy to cause damage to the temperature sensor and affect the service life

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