PT200, PT500 and PT1000 RTD Temperature Sensor

A. Product Overview

PT200, PT500 and PT1000 are different types of RTD temperature sensors made using platinum sensing elements. The number in each sensor name refers to its nominal resistance value at 0 degree Celsius. PT200 has a resistance of 200 ohms, PT500 has a resistance of 500 ohms and PT1000 has a resistance of 1000 ohms at 0 degree Celsius.

These sensors are widely used where accurate and repeatable temperature measurement is required. Compared to many other temperature sensors, platinum RTD sensors offer excellent stability, good linearity and reliable performance over a wide temperature range.

PT200, PT500 and PT1000 RTD sensors are available in different designs such as wire-wound, thin-film and surface-mounted elements. They can also be supplied with different probe sizes, sheath materials, cable types, terminal heads and wiring configurations based on the application requirement.

B. Working Principle

PT200, PT500 and PT1000 RTD sensors work on the principle of resistance change with temperature. Platinum is used as the sensing material because its electrical resistance changes in a predictable and nearly linear way as temperature changes.

When the temperature increases, the resistance of the platinum element also increases. This change in resistance is measured by a temperature controller, indicator, transmitter, data logger or PLC system. The instrument then converts the resistance value into a temperature reading.

For example, a PT1000 sensor has 1000 ohms resistance at 0 degree Celsius. As the temperature rises, the resistance increases according to a defined RTD temperature-resistance curve. This makes it possible to measure temperature accurately and consistently in industrial processes.

C. Why It Is Used

PT200, PT500 and PT1000 RTD sensors are used because they provide accurate, stable and repeatable temperature measurement. They are preferred in applications where temperature accuracy is important for process control, product quality, safety and equipment performance.

PT1000 sensors are often selected where higher sensitivity and better signal strength are required. Due to their higher resistance value, they can offer better performance in certain applications where signal noise or cable resistance may affect measurement.

PT200 and PT500 sensors may be preferred where the application requires specific resistance values, lower self-heating effects or compatibility with existing instruments and control systems.

These RTD sensors are commonly used in temperature monitoring systems, HVAC equipment, laboratory instruments, industrial machines, process plants, control panels and automation systems.

D. Suitable Buyers

PT200, PT500 and PT1000 RTD temperature sensors are suitable for buyers who need reliable temperature measurement in industrial and commercial applications.

Suitable buyers include:

• OEM machine manufacturers
• Automation system integrators
• HVAC contractors
• Panel builders
• Maintenance engineers
• Instrumentation engineers
• Process industries
• Pharmaceutical industries
• Food and beverage industries
• Chemical plants
• Laboratory equipment manufacturers
• Research and development departments
• Electrical and control panel manufacturers
• Industrial equipment suppliers
• Purchase teams looking for replacement RTD sensors

FAQ

1. What is the difference between PT200, PT500 and PT1000 RTD sensors?

The main difference is the nominal resistance value at 0 degree Celsius. PT200 has 200 ohms, PT500 has 500 ohms and PT1000 has 1000 ohms resistance at 0 degree Celsius. The selection depends on the application, sensitivity requirement and instrument compatibility.

2. Which RTD sensor gives better sensitivity?

PT1000 generally gives better sensitivity because it has a higher resistance value. This can improve signal strength and make it useful in applications where precise temperature measurement is required.

3. Where are PT200, PT500 and PT1000 RTD sensors used?

These sensors are used in industrial process control, HVAC systems, automation panels, laboratories, scientific instruments, machinery, food processing, pharmaceutical equipment and commercial temperature monitoring systems.

4. Are PT200, PT500 and PT1000 sensors made from platinum?

Yes, these RTD sensors use platinum sensing elements. Platinum is preferred because it gives stable, accurate and repeatable resistance change with temperature.

5. Can these RTD sensors be used with temperature controllers?

Yes, PT200, PT500 and PT1000 RTD sensors can be used with compatible temperature controllers, indicators, transmitters, PLC modules and data loggers. The instrument must support the selected RTD input type.

6. What wiring options are available for RTD sensors?

RTD sensors are commonly available in 2 wire, 3 wire and 4 wire configurations. 3 wire and 4 wire RTD sensors are preferred where better accuracy is required because they help reduce the effect of lead wire resistance.

7. Which is better, PT1000 or PT200?

PT1000 is better for applications requiring higher sensitivity and stronger signal output, while PT200 may be selected for specific instrument compatibility or application requirements. The best choice depends on the system design and measurement conditions.

8. Can these sensors be customized?

Yes, PT200, PT500 and PT1000 RTD sensors can be customized based on probe length, probe diameter, sheath material, cable length, cable insulation, terminal head, process connection and wiring configuration.

9. Are these sensors suitable for industrial temperature measurement?

Yes, these RTD sensors are highly suitable for industrial temperature measurement due to their accuracy, stability and reliable long-term performance.

10. How do I select the right RTD sensor?

To select the right RTD sensor, check the required temperature range, accuracy class, wiring type, probe size, sheath material, process connection, cable length and compatibility with the temperature controller or PLC.