Temperature Probes

A temperature probe is a sensing instrument used to measure the temperature of surfaces, liquids, gases, machinery, food, laboratory samples, and industrial processes. A device may also be described as a temperature probe sensor, a long temperature probe, or a high temperature probe thermometer, and the right choice depends on temperature range, sensor type, probe design, response time, accuracy, and instrument compatibility.

RS Philippines stocks an extensive range of RTD, thermistor, and thermocouple temperature probes in immersion, penetration, surface, air, and long-reach formats, with a variety of probe lengths, sheath materials, and connector types for laboratory, industrial, and facilities applications.

Types of Temperature Probes

Three sensor technologies are widely used for industrial and laboratory temperature measurement: RTDs, NTC thermistors, and thermocouples. Each offers different characteristics in terms of range, accuracy, response speed, and stability. These sensor types are also available in surface, immersion, penetration, air, flexible, and long temperature probe formats.

RTD Temperature Probes

An RTD (Resistance Temperature Detector) measures temperature by monitoring the change in electrical resistance of a metallic element, most commonly platinum. Pt100 and Pt1000 sensors are the most widely used RTDs and are standardized under IEC 60751.

RTD temperature probes are commonly used in laboratories, industrial monitoring, process control applications, and HVAC systems where high accuracy, repeatability, and long-term stability are required. They generally provide more accurate and stable measurements than thermocouples, although response times may be slower depending on the probe design.

NTC Thermistor Temperature Probes

An NTC (Negative Temperature Coefficient) thermistor is a semiconductor sensing element whose resistance decreases as temperature increases. These temperature probe sensors are widely used in HVAC equipment, electronics, battery-management systems, medical devices, and appliances. They offer high sensitivity and fast response times over a relatively limited temperature range but are typically less linear than RTDs across wider temperature spans.

Thermocouple Temperature Probes

A thermocouple consists of two dissimilar metal conductors joined together to produce a thermoelectric voltage that varies with temperature. Thermocouple probes are widely used in machinery, ovens, furnaces, exhaust systems, and other high-temperature industrial applications. Standardised thermocouple types, including K, J, and T, are defined by IEC 60584, with each type offering different operating characteristics and temperature ranges.

Thermocouples generally provide faster response times and wider temperature ranges than RTDs, making them well suited to demanding industrial environments. However, they may offer lower long-term stability and accuracy than RTD-based probes.

Common Temperature Probe Designs

Beyond internal sensor technology, temperature probes are also categorized by their mechanical design and how they physically interface with the target medium.

• Immersion Probes: Designed for use in liquids, tanks, vessels, and temperature-controlled baths.
• Penetration Probes: Feature pointed sensing tips for insertion into food products, soft materials, and packaged goods.
• Surface Probes: Use flat, spring-loaded, or contact-style tips to measure temperature on pipes, machinery, plates, and other solid surfaces.
• Air and Gas Probes: Optimized for measuring ambient air, duct temperatures, oven environments, and gas streams.
• Flexible Probes: Suitable for routing around equipment or accessing restricted locations.
• Long Temperature Probes: Provide additional reach for deep vessels, containers, tanks, and equipment housings.
• High-Temperature Probes: Use specialized sheath, insulation, and sensor materials designed for elevated-temperature industrial applications across the Philippines.

Industrial Applications of Temperature Probes

Temperature probes and sensors at RS are used in many professional and industrial environments across the Philippines.

• Industrial Maintenance: Monitoring motors, bearings, pumps, process equipment, pipelines, and machinery.
• HVAC Systems: Measuring air, duct, refrigeration, and building-services temperatures.
• Laboratories: Monitoring samples, environmental chambers, controlled experiments, and calibration equipment.
• Food Processing and Catering: Measuring ingredients, liquids, storage temperatures, and production processes.
• Electronics: Monitoring batteries, power electronics, circuit assemblies, and thermal-management systems.
• Industrial Heating Applications: A specialized high temperature probe thermometer is used to measure temperatures in furnaces, ovens, kilns, exhaust systems, and thermal-processing equipment.

The Leading Supplier and Distributor of Temperature Probes in the Philippines

RS Philippines is your trusted source for high-quality temperature probes. We stock an extensive range from industry leaders like RS PRO, Testo, and Chauvin Arnoux. Our selection includes various sensor types and probe lengths, with prices varying depending on the sensor technology, measurement range, accuracy, probe length, diameter, sheath material, cable type, and connector configuration.

We also carry other essential test and measurement accessories, such as temperature calibrators and data loggers, to complete your setup. Buy your RTD temperature probe, thermocouple temperature probe, NTC thermistor probe, and other accessories online today. For more details on our ordering process, delivery services, and delivery fees, please refer to our delivery page.