Magnetic Platinum Thermistor-2025

Magnetic platinum thermistorIt is a temperature sensor that uses the characteristic of platinum material's resistance changing with temperature to measure temperature. Its principle is based on the thermoelectric effect, where the temperature gradient formed between two different metals generates an electromotive force that is temperature dependent.

The working principle of platinum thermistor is to measure temperature by utilizing the characteristic of platinum material's resistance changing with temperature. The resistance value of platinum thermistor increases linearly with the increase of temperature. Therefore, by measuring the resistance value of platinum thermistor, the temperature of the measured object can be calculated.

Platinum thermistors have the advantages of high accuracy, good stability, and fast response time, and are widely used in various industrial controls and laboratory measurements. In practical applications, the measurement range of platinum resistance thermometers is usually between -200 ℃ and+1000 ℃, and different models and specifications can be selected according to needs. In addition, platinum thermistors also have characteristics such as corrosion resistance, high temperature resistance, and oxidation resistance, making them suitable for temperature measurement in various harsh environments.

Magnetic platinum thermistorTechnical Specifications:

Measurement temperature range: -200 ℃ to 850 ℃

Nominal pressure: 1.6Mpa

Division number: Pt10/Pt50/Pt100/Pt200/Pt300Pt500/Pt1000/Pt2000. Using German ABB thin film platinum resistance elements, accuracy level: (0.15+0.002t) and B level (0.3+0.005t)

Resistance category: Thin film platinum resistance/Thick film platinum resistance/Ceramic platinum resistance Mica platinum resistance/Glass platinum resistance.

Installation points:

1. In order to ensure sufficient heat exchange between the measuring end and the measured medium, the location of the measuring point should be selected reasonably, and thermal resistors should be avoided as much as possible near dead corners of valves, elbows, pipelines, and equipment.

2. With protective sleeves, there is heat transfer and dissipation loss. In order to reduce measurement errors, thermocouples and thermistors should have sufficient insertion depth.

(1) For measuring the temperature of the fluid at the center of the pipeline, the measuring end of the thermistor should generally be inserted into the center of the pipeline (vertically or obliquely installed). If the diameter of the tested fluid pipeline is 200 millimeters, the insertion depth of the thermistor should be selected as 100 millimeters.

(2) For temperature measurement of high temperature, high pressure, and high-speed fluids (such as main steam temperature), in order to reduce the resistance of the protective sleeve to the fluid and prevent the protective sleeve from breaking under the action of the fluid, shallow insertion of the protective tube or the use of a hot sleeve thermistor can be adopted. The shallow insertion type thermal resistance protective sleeve should be inserted into the main steam pipeline at a depth of not less than 75mm; the standard insertion depth for the hot sleeve type thermal resistance is 100mm.

(3) If it is necessary to measure the temperature of the flue gas inside the flue, even though the diameter of the flue is 4m and the insertion depth is 1m, it is sufficient.

(4) When the insertion depth of the measuring element exceeds 1m, it should be installed vertically as much as possible, or support frames and protective sleeves should be added.

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