2Kohm 3470K Glass NTC Thermistor is the glass bead NTC thermistor which is applied in home appliances, vehicles, and industrial devices. R25=2Kohm±1%B25/50=3470K±1%

Product Description:

2Kohm 3470K Glass NTC Thermistor is a glass coating NTC thermistor which is made of dumet wires, NTC thermistor, and glass bead.

It is applied for industrial devices, vehicles, and home appliances.

Features：

High temperature resistant

Operating temperature range: -40℃~300℃

Glass encapsulation

R25=100KΩ±1%，B25/50=3950±1%

Glass probe 1.3mm

Application:

Automotic electronics

Home appliances

Industrial device

Structure and Dimension：

structure of 2Kohm 3470K Glass NTC Thermistor

The main characteristics of the sensor

The static characteristic of the sensor refers to the relationship between the output of the sensor and the input of the static input signal. Because the input and output are independent of time at this time, the relationship between them, that is, the static characteristics of the sensor, can be an algebraic equation without time variables, or the input is used as the abscissa, and the corresponding output is The characteristic curve drawn by the ordinate is described. The main parameters that characterize the static characteristics of the sensor are: linearity, sensitivity, hysteresis, repeatability, drift, etc.

Linearity: refers to the degree to which the actual relationship curve between the sensor output and the input deviates from the fitted straight line. Defined as the ratio of the maximum deviation value between the actual characteristic curve and the fitted straight line to the full-scale output value in the full-scale range.

Sensitivity: Sensitivity is an important indicator of the static characteristics of the sensor. It is defined as the ratio of the increment of the output quantity to the corresponding increment of the input quantity that caused the increment. Sensitivity is denoted by S.

Hysteresis: The phenomenon that the input and output characteristic curves of the sensor do not overlap during the change of the input quantity from small to large (positive stroke) and the input quantity from large to small (reverse stroke) becomes hysteresis. For the input signal of the same size, the forward and reverse stroke output signals of the sensor are not equal in size, and this difference is called the hysteresis difference.

Repeatability: Repeatability refers to the degree of inconsistency in the characteristic curve obtained when the input quantity of the sensor is continuously changed several times in the same direction over the full range.

Drift: The drift of the sensor refers to the change of the sensor output with time when the input is constant. This phenomenon is called drift. There are two reasons for the drift: one is the structural parameters of the sensor itself; the other is the surrounding environment (such as temperature, humidity, etc.).

Resolution: When the input of the sensor increases slowly from a non-zero value, the output changes observably after a certain increment. This input increment is called the resolution of the sensor, that is, the minimum input increment.

Threshold: When the input of the sensor increases slowly from zero, the output changes observably after reaching a certain value. This input value is called the threshold voltage of the sensor.

Sensor dynamics

The so-called dynamic characteristics refer to the characteristics of the output of the sensor when the input changes. In practical work, the dynamic characteristics of the sensor are often represented by its response to some standard input signals. This is because the response of the sensor to the standard input signal is easy to obtain experimentally, and there is a certain relationship between its response to the standard input signal and its response to any input signal, and the latter can often be inferred by knowing the former. The most commonly used standard input signals are step signal and sinusoidal signal, so the dynamic characteristics of the sensor are also commonly expressed by step response and frequency response.

Linearity

Typically, the actual static characteristic output of the sensor is a curve rather than a straight line. In practical work, in order to make the meter have a uniform scale reading, a fitted straight line is often used to approximately represent the actual characteristic curve, and the linearity (non-linear error) is a performance indicator of this approximation.

There are many ways to select the fitting line. For example, take the theoretical straight line connecting the zero input and the full-scale output point as the fitting straight line; or take the theoretical straight line whose sum of squares of deviations from each point on the characteristic curve is the smallest as the fitting straight line, and this fitting straight line is called the least squares fitting. Line up.

Sensitivity refers to the ratio of the output change △y to the input change △x under the steady state working condition of the sensor.

It is the slope of the output-input characteristic curve. If there is a linear relationship between the sensor output and the input, the sensitivity S is a constant. Otherwise, it will vary with the amount of input.

The dimension of sensitivity is the ratio of the dimensions of output and input. For example, for a displacement sensor, when the displacement changes by 1mm, the output voltage changes by 200mV, then its sensitivity should be expressed as 200mV/mm.

When the dimensions of the output and input of the sensor are the same, the sensitivity can be understood as the magnification.

Improve the sensitivity, can get higher measurement accuracy. However, the higher the sensitivity, the narrower the measurement range and the worse the stability.

Resolution

Resolution refers to the ability of a sensor to perceive the smallest change in the measurand. That is, if the input quantity changes slowly from some non-zero value. When the input change value does not exceed a certain value, the output of the sensor will not change, that is, the sensor cannot distinguish the change of the input quantity. Its output changes only when the input quantity changes by more than the resolution.

Usually the resolution of each point in the full-scale range of the sensor is not the same, so the maximum change value in the input quantity that can produce a step change in the output quantity in the full-scale range is often used as an index to measure the resolution. If the above indicators are expressed as a percentage of full scale, it is called resolution. Resolution has a negative correlation with the stability of the sensor.

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　　This is Hefei Jingpu Sensor Technology Co.,Ltd. Jingpu Sensor is a national high-tech enterprise integrating R&D, production and sales of thermistors and temperature sensors. The products include various epoxy-encapsulated and glass-encapsulated thermistors, as well as various temperature sensor assemblies, which are widely used in medical (eg: supporting monitors, medical equipment, bacterial incubators, medical refreigerators, etc.), smart wear, Auto (eg: water temperature, oil temperature, air conditioner, filter, intake pressure temperature, steering wheel, rearview mirroe, tire, battery pack, etc.), domestic appliances (eg: air conditioner, refrigerator, electric water heater, induction cooker, boiling water boiler, electronic Calendar, etc.), power, fire alarm, meteorology, ocean and other fields.