PT100 / PT1000 Temperature Sensor Cable for Electrical Appliances

What is a PT100 / PT1000 temperature sensor probe cable?
A temperature sensor with an electronic thermometer refers to one or more PT1000 temperature sensors with special protection. The components include connectors, neck tubes, thermocouple sheaths or handles, etc. The sensor element built into the temperature sensor is the PT1000 element that actually performs the temperature measurement, converting the measured temperature into an electrical signal.

Temperature sensors in the field of industrial temperature measurement are divided into two types according to the following measurement principles:
thermocouple type
Resistive
PT100 / PT1000 temperature sensor with thermocouple

Thermocouples are suitable for high temperature measurements up to +1,600 °C. Compared with resistance thermometers, small-diameter armored thermocouple temperature sensors have faster response times.

Thermocouples are made of two different metals that are bound together to form a “thermocouple.” The connection point (hot junction) is the actual measurement point of the temperature sensor, and the wire end is designated as the cold junction. When the temperature at the measurement point of the temperature sensor changes, a voltage will be generated between the hot end and the cold end due to the difference in metal electron concentration and temperature. This voltage is approximately proportional to the temperature at the measuring point of the temperature sensor (Seebeck effect).

Resistance thermometers have their advantages in the low and medium temperature range of -200 … +600 °C. In industry, resistance thermometers mainly use Pt100 or Pt1000 as the measuring resistor. If a temperature sensor’s sensing element detects an increase in temperature, its resistance will also increase (positive temperature coefficient). The Pt100 resistance thermometer has a resistance of 100 Ohm at 0 °C, while the Pt1000 resistance thermometer has a resistance of 1,000 Ohm.

Generally speaking, two types of measuring resistors are commonly used in temperature sensors: film measuring resistors and wire-wound measuring resistors. The advantages of thin film measuring resistors are their small overall size, strong vibration resistance, and the ability to adopt suitable structures. Provided that their temperature range is not exceeded (measuring range of temperature sensors with accuracy class B: -50 … +500 °C for thin-film measuring resistors. -200 … +600°C for wire-wound measuring resistors). Thin film measuring resistors are standard design.

pt100, PT1000 temperature sensor is a commonly used temperature measurement instrument and an indispensable temperature measurement component in various industries. PT100 temperature sensor is widely used in industry, electronics, electric power, petroleum, chemical industry, machine tools and other fields.

PT100, PT1000 temperature sensors are composed of thermocouples or thermal resistors and temperature transmitter modules. Adopting 2, 3, and 4-wire system, with non-linear correction circuit, it can directly measure the temperature of liquid, gas media and various special media in the range of -200°C to +1600°C in industrial processes. Convert the temperature signal into a 4-20mA current output signal that is linear with the temperature signal, and can be transmitted to the display, adjustment recording instrument or computer for centralized control.

Pt100, PT1000 temperature sensor is an instrument that converts temperature variables into a transmittable standardized output signal. Mainly used for measurement and control of temperature parameters in industrial processes.

A transmitter with a sensor usually consists of two parts: the sensor and the signal converter. The sensor is mainly a thermocouple or thermal resistor; the signal converter is mainly composed of a measurement unit, signal processing and conversion unit. Some transmitters have added display units, and some also have fieldbus capabilities.

Working principle of pt100, PT1000 temperature sensor
pt100 and PT1000 temperature sensors are used as temperature measurement sensors and are usually used in conjunction with temperature transmitters, regulators and display instruments to form a process control system. It is used to directly measure or control the temperature of liquid, steam and gas media and solid surfaces in the range of -200℃-500℃ in various production processes. Thermal resistance uses the characteristic that the resistance of a substance changes when its temperature changes to measure temperature. When there is a temperature gradient in the measured medium, the measured temperature is the average temperature in the medium within the range of the temperature sensing element. Although the shapes of various thermal resistors are very different, their basic structures are roughly similar, generally consisting of temperature sensing elements, insulating sleeves, protective tubes, and junction boxes.

Thermal resistance uses the characteristic that when the temperature of a substance changes, its resistance also changes to measure temperature. When the resistance value changes, the working instrument displays the temperature value corresponding to the resistance value. It has the characteristics of compression spring temperature sensing element, good shock resistance, high temperature measurement accuracy, high mechanical strength, good pressure resistance, imported thin film resistor element, reliable and stable performance.

The physical parameters of the temperature sensor that change with temperature include expansion, resistance, capacitance, electromotive force, magnetic properties, frequency, optical properties, thermal noise, etc. With the development of production, new temperature sensors will continue to emerge.

arduino pt1000 rtd sensor circuit datasheet

3 wire PT1000 temperature sensor probe

4 wire 1000 ohm rtd PT1000 sensor

jumo PT100 - PT1000 temperature sensor plug controller

The pt100 temperature sensor converts non-electrical physical quantities into electrical quantities, thereby enabling precise temperature measurement and automatic control of semiconductor devices. Temperature sensors have a wide range of uses and can be used for temperature measurement and control, temperature compensation, flow rate, flow and wind speed determination, liquid level indication, temperature measurement, ultraviolet and infrared light measurement. Therefore, the gap between the thermocouple protection tube and the furnace wall hole should be blocked with heat-resistant materials such as refractory clay or asbestos rope to prevent hot and cold air convection from affecting the accuracy of temperature measurement. The cold end of the thermocouple is too close to the furnace body, causing the temperature to exceed 100°C. Thermocouples should be installed away from strong magnetic fields and strong electric fields as much as possible.

The amplitude of the temperature fluctuation detected by the pt100 temperature sensor is smaller than the amplitude of the furnace temperature fluctuation. The greater the measurement lag, the smaller the amplitude of the thermocouple fluctuations and the greater the difference from the actual furnace temperature. When a thermocouple with a large time constant is used for temperature measurement or temperature control, although the temperature displayed by the instrument fluctuates very little, the actual furnace temperature may fluctuate greatly.

PT100, PT1000 temperature sensors are sensors packaged with platinum resistance PT100, PT1000 components. Depending on the temperature range and installation method of the use environment, different materials are used to package the sensor into a sensor that can be directly used for on-site temperature measurement. PT100 and PT1000 components themselves are very fragile and cannot be used directly for on-site temperature measurement. Although the temperature measurement range of PT100 and PT1000 components is very wide, the PT100 temperature sensor does not guarantee the service life and temperature measurement accuracy within the temperature range. In other words, the service life and temperature measurement accuracy of the PT100 temperature sensor are determined by the packaging form. Therefore, if the PT100 temperature sensor is a temperature probe that can be used directly for temperature collection after packaging, the parameters of the temperature sensor are not equivalent to the parameters of electronic components. If you want to buy electronic components, you only need to find the manufacturer or agent of the component. But if you want to buy a PT100 temperature sensor, you need to find a manufacturer that specializes in temperature sensor packaging, and clearly communicate the specific technical requirements with the manufacturer’s technical staff. Only in this way can we ensure that we get a temperature sensor with suitable temperature measurement range and installation method and guaranteed service life.

The pt100 temperature sensor is a platinum thermal resistor, and its resistance changes as the temperature changes. The 100 after PT means that its resistance is 100 ohms at 0°C, and its resistance is approximately 138.5 ohms at 100°C. Its working principle: When the PT100 is at 0 degrees Celsius, its resistance is 100 ohms, and its resistance will increase at an approximately constant rate as the temperature rises. But the relationship between them is not a simple proportional relationship, but should be closer to a parabola.
The calculation formula for how the resistance of a platinum resistor changes with temperature: -200<t<0℃ Rt=R0[1+At+Bt+C(t-100)t]
(1) 0<t<850℃ Rt=R0 (1+At+Bt2)
(2) Rt is the resistance value at t℃, and R0 is the resistance value at 0℃.
A, B, and coefficients in the formula are experimentally determined.
The standard coefficients are: A=3.90802*10-3℃; B=-5.802*10-7℃; C=-4.27350*10-12℃