RTD กับ PT100: ความต้านทานของเซ็นเซอร์ในโพรบวัดอุณหภูมิ

Differences between RTD thermal resistors and PT100
The main difference between an RTD and a Pt100 is the material used for the sensing element:
RTD：A general term for temperature sensors that use a metal’s resistance to temperature to measure temperature. The metal used can be platinum, nickel, or copper.
RTDs are used in many industries, including laboratories, air conditioning, and food processing. Pt100s are a popular choice because of their accuracy and stability.
RTDs work by measuring the change in resistance of a metal when it’s heated. The change in resistance is converted into a voltage signal, which is then calibrated to determine the temperature.
Although PT100 is a type of RTD thermal resistor, not all RTDs are PT100. In fact, RTD thermal resistors can be divided into several types according to the materials used:

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RTD vs PT100 Resistance Sensor Temperature Measurement Probe

1. Material differences:
– PT100 uses pure platinum as a temperature sensing element.
– Other common RTD materials include metals such as copper (Cu) and nickel (Ni), each of which has different temperature coefficients and applicable ranges.

2. Temperature range:
– PT100 is suitable for a wide temperature measurement range, especially in low temperature environments.
– Other RTD types may have advantages in certain specific temperature ranges, such as nickel-based RTDs are more common in high temperature measurements.

3. Cost:
– Due to the high price of platinum, the cost of PT100 is relatively high.
– RTD thermal resistors made of other materials are lower in cost, but may be slightly inferior in performance.

Among temperature sensors, RTD thermal resistors reflect temperature through resistance changes. PT100 is a commonly used RTD with platinum as the element, high precision and good stability. RTD has a variety of materials, suitable for different temperature ranges and cost requirements, and is widely used in industry, scientific research and daily fields.
In industrial production and scientific research, accurate temperature measurement is essential to ensure product quality and experimental results. As an important tool to achieve this goal, temperature sensors are of various types and have their own characteristics.

Overview of RTD thermal resistors
RTD thermal resistors are temperature sensors that reflect temperature changes by measuring resistance changes. Its working principle is based on the property that the resistance of conductors or semiconductor materials increases (for most metal materials) or decreases (for some semiconductor materials) as the temperature increases. RTD thermal resistors have the advantages of good stability, ความแม่นยำสูง, and fast response speed, and are suitable for occasions that require precise temperature control.

PT100 thermal resistors
PT100 is a specific type of RTD thermal resistor, and its name comes from “Platinum” (platinum) และ “100” (100 ohms at 0°C). It is the most commonly used RTD sensor and is widely used in industrial process control, laboratory measurement and other fields that require high-precision temperature monitoring. The advantages of PT100 include:
1. High accuracy: PT100 thermal resistor can provide very accurate temperature readings, and its error range is usually within ±0.1°C.
2. Stability: Because it uses platinum as a temperature sensing element, PT100 has excellent chemical inertness and physical stability, and can maintain its performance over a wide temperature range.
3. Good linearity: In the operating temperature range of -200°C to +850°C, the resistance value of PT100 is approximately linear with temperature, which is easy to calibrate and calibrate.
4. Strong reliability: Platinum material is highly corrosion-resistant and not easily affected by environmental factors, making it suitable for long-term use.

Application scenarios
1. Industrial production:
– In the chemical, electric power, metallurgical and other industries, PT100 is widely used in temperature control and monitoring due to its high precision and stability.
– Other types of RTD thermal resistors are selected according to actual needs.

2. Scientific research:
– In laboratory environments, PT100 can provide accurate data support to help researchers conduct in-depth analysis.

3. Daily applications:
– Household appliances such as ovens and air conditioners also use RTD thermal resistors to monitor internal temperatures to ensure normal operation of the equipment.