RTD Sensors

RS Philippines offers a wide range of RTD sensors for precise temperature monitoring in industrial and laboratory environments. Our collection includes popular options like the Pt100 RTD and Pt 1000 resistance temperature detectors, known for their accuracy and reliability. As a trusted supplier in the Philippines, RS provides fast delivery and top-quality products to meet your temperature measurement needs. Whether you're working with industrial systems or lab equipment, our RTD sensors ensure optimal performance and dependable results.

What Is an RTD Sensor?

Resistance Temperature Detectors or RTDs are used to sense varying temperature ranges and levels of resistance in industrial and commercial applications by correlating changes in electrical resistance to temperature variations. An RTD typically consists of a resistance element and insulated copper wires.

The resistive element is usually made of platinum, nickel, nickel-iron, or copper as these materials offer high accuracy, fast response time, and a wide temperature range. RTD sensors provide precise and repeatable readings, making them ideal for industrial, commercial, and scientific applications. The main function of an RTD is to probe increases and decreases in temperature and control them accordingly for accurate temperature control.

How Do RTD Sensors Work?

RTD sensors are manual measurement tools that work by measuring the change in electrical resistance of a metal, typically platinum, as temperature increases. The RTD resistor is placed in the area where the temperature measurement is required. As the electrical current passes through the metal, the resistance element measures the change in electrical resistance. When the temperature rises, the resistance increases, which is measured in Ohms.

These resistance values are then converted into temperature readings. The ratio of resistance change can vary based on the element used for the resistor. RTD sensors are commonly used in precision monitoring and control circuits to ensure accurate and reliable temperature measurements.

Types of RTD Sensors

The common types of RTD sensors are:

Pt100 RTD

The most common Pt100 RTD measures 100 Ohms at 0°C and is known for its high accuracy, stability, and repeatability. This temperature sensor is IEC 60751 compliant, making it ideal for laboratory-grade and industrial applications.

Pt1000 RTD

PTt1000 RTD sensor has a higher resistance of 1000 Ohms at 0°C, making it suitable for longer cable runs or low-power applications. While it provides similar temperature ranges and tolerances as the Pt100, the resistance value is ten times higher for the same temperature.

Wiring Configurations

• 2-wire: Simplest and least expensive but less accurate due to lead resistance affecting measurements.
• 3-wire: Common in industrial applications; compensates partially for lead resistance assuming equal wire lengths.
• 4-wire: Provides the highest accuracy by fully compensating for lead resistance through separate current and voltage measurement leads, ideal for precision laboratory use.

RTD Probes

Available in a variety of sheath materials and sizes, making them suitable for both industrial and lab setups. For instance, Pt100 RTD probe is ideal for gas and air applications.

How to Choose the Right RTD Sensor?

Choosing the right RTD sensor at reasonable prices ensures accurate and reliable temperature measurement tailored to your specific application. Consider the following factors when buying a sensor in the Philippines:

• Accuracy Requirements: Choose a Pt100 temperature sensor for high precision applications. Opt for Pt1000 if you need longer cable runs without signal loss.
• **Wiring Setup: **A 2-wire configuration is the simplest and most cost-effective but is less accurate due to the inability to compensate for lead wire resistance. A 3-wire setup offers a good balance between simplicity and improved accuracy by partially correcting for lead resistance. For the highest precision, especially in lab-grade or critical measurements, a 4-wire configuration is recommended, as it fully compensates for lead wire resistance and ensures highly accurate readings.
• Temperature Range: Ensure the sensor is rated for your system’s operating temperature to avoid inaccurate readings or sensor failure.
• Probe Type and Sheath Material: Select an appropriate probe style (surface, immersion, or air probes) and sheath material (stainless steel for corrosive environments, ceramic for high temperatures) depending on your operating environment. The RTD Pt100 probe offers versatile options for all types.
• Industry Use: Confirm sensor compatibility with your application environment. For example, use stainless steel sheaths for food, pharma, or corrosive environments.

Where Are RTD Sensors Used?

RTD sensors are widely used in industries where accurate and stable temperature monitoring is essential.

Manufacturing and Process Control

RTD sensors are used to monitor critical temperatures in boilers, HVAC systems, and automation equipment, helping ensure industrial safety and process efficiency.

Laboratory and Scientific Applications

Pt100 RTD sensors are commonly used for precise temperature tracking in research, electronics testing, and calibration environments, where reliability and repeatability are key.

Food, Beverage, and Pharmaceutical

Industrial RTD sensors are ideal for hygienic or chemically sensitive environments, delivering stable and accurate measurements required for regulatory compliance and quality control.

Benefits of RTD Sensors

There are many benefits to using resistance temperature sensors in industrial processes. Here are some of them:

• High Accuracy and Stability: RTD sensors provide precise temperature readings with excellent repeatability over time.
• Wide Temperature Range: A resistance temperature detector can be purpose-built to be suitable for applications ranging from cryogenic to high-temperature environments.
• Linear Response: Platinum RTD sensors offer a near-linear resistance-temperature characteristic simplifying measurement and calibration.
• Durability: RTDs are robust and can be housed in protective probes for harsh industrial conditions.
• Compatibility with Existing Hardware: Available in multiple wiring configurations to suit different accuracy and installation needs.
• Low Self-Heating: Minimal current reduces sensor self-heating, improving measurement accuracy.

Buy RTD Sensors in the Philippines

Looking to buy RTD sensors in the Philippines? RS offers a wide selection of high-quality RTD sensors, including Pt100, Pt1000, and various probe-type models suitable for both industrial and laboratory use. Whether you need a resistance temperature detector for automation, research, or process control, RS provides reliable solutions from trusted brands including Jumo, Endress+Huaser, Prosensor and more at competitive prices. Enjoy next-day delivery across the Philippines. For more delivery related information, refer to our delivery section.