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You are here → Home > Temperature Sensors > Resistance thermometers > RTD Pt100 with Pot Seal

RTD Pt100 resistance thermometer with pot seal and cable

Resistance Thermometers - Pt100 Sensors

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Which RTD Pt100 sensor do I need?

  • Type 16 – Rigid Stem: The everyday choice for most applications, with a rigid probe typically up to 500 mm long and rated up to 250°C.

  • Type 17 – Mineral Insulated: Choose when a semi-flexible construction is preferred or for higher temperatures, rated up to 500°C.

  • Type 18 – High Temperature / High Accuracy: Semi flexible for temperatures up to 600°C or when a 1/5 or 1/10 DIN high-accuracy sensing element is required.
  • Custom built to your specification and terminated in a wide choice of pot seal styles and temperature ratings. Supplied with either short tails or a longer PVC, PFA or fibreglass insulated extension lead
  • Alternatively, we have a large range of sensors available to buy online in various diameters and lengths
  • High accuracy, repeatability and reproducibility as simplex, duplex or triplex element assemblies
  • Wide operating temperature range of -100ºC to +600ºC
  • Available in 2, 3 and 4 wire configurations, in grade B, A, 1/3, 1/5 or 1/10 accuracy
  • 316L Stainless Steel sheathed and manufactured to IEC 60751
  • Type 17 and Type 18 sheaths can generally be bent and twisted to suit the application (do not bend within 50mm of the tip)

RTD Pt100 Sensor Quote Request

Use this form to configure a single sensor style. If you require multiple sensor styles, please list them in the Additional Information box at the end of the form or contact us for assistance.

1. Sensor Basics

Not sure which RTD style you need? Compare the three RTD Pt100 sensor styles.

Not sure which tolerance you need? Read more about RTD Standards and Tolerances

mm
2. Wiring Configuration

Different wiring schemes are used to minimise errors caused by lead resistance:

2-wire RTD
2 Wire
Simplest, but lead resistance adds error.
3-wire RTD
3 Wire
Common in industrial applications; compensates for most of the error caused by lead resistance (assuming wires are equal).
Recommended
4-wire RTD
4 Wire
Highest accuracy; eliminates lead resistance completely, often used in labs and calibration.
Number of elements:

For a more detailed explanation of RTD wiring, please see our guide to 2, 3 and 4-wire RTDs

3. Pot Seal Style
CE2L
CE2L
for sheath diameters up to 3mm
CE2CTRL
CE2CTRL
with anti chafe spring - for sheath diameters up to 3mm
CE4CL
CE4CL
for sheath diameters from 3mm to 8mm
CE4CTRL
CE4CTRL
with anti chafe spring - for sheath diameters from 3mm to 8mm
CE3L
CE3L
8mm ISO x 1mm threaded pot - for sheath diameters up to 3mm
CE5
CE5
Brass Compression Gland Seal, 16mm ISO x 1.5mm - FIXED for sheath diameters 1mm to 8mm
CE5S
CE5S
St./St. Compression Gland Seal, 16mm ISO x 1.5mm - FIXED for sheath diameters 1mm to 8mm
End Seal Temperature Rating
4. Extension Cable

Sensors with a pot seal are supplied with PFA tails as standard, as shown above. However, for many applications, a length of cable is more practical. If you require longer leads, please select a cable from the list below:

5. Optional Reduced Tip

A reduced tip is a short section at the end of the sensor sheath that is reduced to a smaller diameter. This can improve response time where faster temperature measurement is required. Select this option if you would like the probe tip reduced.

6. Optional Compression Fitting
St.St. fitting
Stainless Steel
Brass fitting
Brass Fitting
7. Contact Details

Frequently Asked Questions

  • What is an RTD Pt100 sensor, and how does it work?
    An RTD (Resistance Temperature Detector) Pt100 sensor measures temperature by detecting changes in electrical resistance. The "Pt" stands for platinum, the material used in the sensing element, and "100" refers to the resistance value of 100 ohms at 0°C. As the temperature changes, the resistance of the platinum element varies, allowing for accurate temperature measurements.
  • 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 UKAS accredited laboratory.
  • What is the temperature range for RTD Pt100 sensors?
    The temperature range of an RTD sensor depends on factors such as the construction, sheath material and insulation used in the construction. While some platinum elements can withstand temperatures up to 850°C, the overall sensor design will limit the maximum temperature rating. Please check the product specifications for the exact temperature range based on the sensor’s construction. If you need any advice, our engineers are happy to assist!