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RTD Sensors – Precision Platinum Resistance Thermometers

We manufacture RTD sensors (Resistance Temperature Detectors) for high-accuracy industrial temperature measurement. Available from stock or with short lead times in the USA, our sensors use IEC 60751-compliant Pt100 and Pt1000 elements and offer exceptional precision and stability, even in harsh environments.

From standard 3-wire setups to custom high-temperature probes with 4-wire outputs, we supply RTDs built to your specifications, with NIST-traceable calibtration available and fast U.S. support and delivery.

Typical RTD Sensors - Pt100 Resistance Thermometers

Mineral Insulated
RTDs Various Mineral Insulated RTD SensorsOur most popular RTD sensor, ideal for most applications. With connector, pot seal, wire or an alloy or plastic head.Rigid Stem
RTD Temperature Sensor Rigid Stem RTDs with lead an connectorsIdeal for rigid stem applications or where the sensor is shorter than 2" long, limited to 480°F. Simplex and duplex. Hand Held
RTD SensorsHand Held Pt100 Sensors A range of hand held RTD Sensors to suit a variety of applications from general purpose to surface and air temperature measurements RTD Sensors for
Surface Measurements Various RTD Temperature Sensors for Surface MeasurementsA wide range of RTD sensors for surface measurements including self adhesive patch, pipe, magnetic, bearing etc. Miniature Pt100
RTD Sensors Miniature Pt100 Sensors 0.062" and 0.080" diameter sensors ideal for precision fast response measurements or minimal displacement is required Other Popular Styles
of RTD Sensors Popular RTD Sensor StylesA wide range of RTD Sensors to suit many applications. Bayonet, bolt, stator slot, basic element styles etc. Reduced Tip
RTD Sensors Reduced Tip resistance thermometers Fast response RTD sensors ideal for industrial and other applications Autoclave
RTD SensorsAutoclave RTD Pt100 Sensors RTD sensors designed specifically for the harsh environments in autoclaves

Why Choose Our RTD Sensors?

  • Available from stock or with fast turnaround in the USA for OEMs and industrial users
  • High-accuracy Class A and up to 1/10 DIN Pt100 elements available
  • 2-wire, 3-wire and 4-wire wiring options
  • Wide temperature ranges up to 1110ºF / 600°C (probe-dependent)
  • Stainless steel sheaths, wide range of extension cables, terminal heads and plug/jack termination available
  • NIST-traceable calibration available for quality and compliance

What Is an RTD Sensor?

An RTD (Resistance Temperature Detector) is a temperature sensor that uses the change in resistance of a platinum element to measure temperature. The most common type is the Pt100, which has a resistance of 100 ohms at 0°C. As temperature increases, the resistance rises in a predictable way - allowing for accurate conversion into temperature readings via compatible instruments.

Wiring Configurations

  • 2-wire: Basic connection; includes lead resistance in measurement
  • 3-wire: Compensates for lead resistance assuming matched wires
  • 4-wire: Most accurate; cancels out lead resistance entirely

We offer RTDs with flexible leads, including PVC, PFA or fiberglass insulated leads, terminal heads and connectors.

RTD vs Thermocouple – Which Should I Use?

RTDs are more accurate and stable than thermocouples over moderate temperature ranges (up to ~600°C). They’re ideal for precision applications in industries like food processing, pharmaceuticals, power generation, HVAC, and manufacturing. Thermocouples remain the better choice for higher temperature extremes or fast response needs.

Applications

  • Food & Beverage Processing
  • Pharmaceutical Manufacturing
  • Biotech & Laboratory Equipment
  • Energy / Power Plants
  • HVAC Systems
  • Chemical & Petrochemical

Need a Custom RTD Sensor?

We specialize in custom RTD builds for OEMs, integrators, and end users. Whether you need a special diameter, flange fitting, IP-rated assembly, or non-standard temperature range - we can help.

Get a Quote or Ask a Question

Frequently Asked Questions

  • What’s the temperature range for your RTDs?
    Depending on construction, our sensors can operate from -200°C to +600°C. Contact us for designs tailored to your application.
  • How accurate are RTD Pt100 sensors?
    RTD Pt100 sensors offer high accuracy and stability, with industrial-grade elements ranging from Class B (±0.3ºC at 0ºC) to Class A (±0.15ºC at 0ºC). Higher precision options, such as 1/10 class elements, provide an accuracy of ±0.03ºC at 0ºC. These sensors are widely used in industrial, laboratory, and scientific applications requiring high precision. Additionally, we offer calibration services in our NIST traceable laboratory.
  • Can you supply RTDs with plugs or connectors?
    Yes - we offer a full range of plug/jack, terminal head, and industrial connector options. Let us know your instrumentation setup and we’ll match it.