Resistance Thermometer Swaged Tip with Terminal Entry Gland

Three styles of RTD Pt100 (PRT) sensor are available; Type 17's, our most popular style, are economical, semi flexible and suited to a wide variety of industrial applications up to 500°C. Type 18's are best suited for applications up to 600°C or where a high accuracy element is incorporated and Type 16's, which are ideal for rigid stem applications or where the sensor is shorter than 50mm, rated to 250°C
Custom built to your specification and terminated in either a brass or St./Steel 16mm ISO x 1.5mm gland with a choice of temperature ratings. Supplied with either short tails as shown or a longer 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

Sheaths can generally be bent and twisted to suit the application (do not bend within 50mm of the tip)

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!

Number of Elements	Select
Simplex (1 element)
Duplex (2 elements)
Triplex (3 elements)
Resistance value at 0ºC: 100Ω (standard) 130Ω 1000Ω

	Tolerance of Element (IEC 60751 for Pt100)		Select
Grade	Accuracy @ 0ºC	Accuracy @ 100ºC
B	±0.30°C	±0.80°C
A	±0.15°C	±0.35°C
1/3	±0.10°C	±0.27°C
1/5	±0.06°C	±0.16°C
1/10	±0.03°C	±0.08°C
Note: 130Ω elements are only available in Grade B

Illustration	Select
Brass Compression Gland Seal 16mm ISO x 1.5mm - FIXED (sheath diameters 1.5mm to 8mm)
St./St. Compression Gland Seal 16mm ISO x 1.5mm - FIXED (sheath diameters 1.5mm to 8mm)
End Seal Temperature Rating: 135°C (standard) 235°C

Illustration	Select
PVC (rated to 105ºC)
PFA (rated to 250ºC)
Fibreglass with St./St. Overbraid (rated to 480ºC)
Please enter Cable length in metres mtrs

1	Sensor Style	Temperature Range
17	Type 17 - Semi flexible, Mineral Insulated Our most popular style	-100ºC to +500ºC
18	Type 18 - Semi flexible, Mineral Insulated Good for high accuracy, high temp applications	-100ºC to +600ºC
16	Type 16 - Semi flexible, Rigid Sheath Ideal for rigid stem applications or where the sensor is shorter than 50mm	-100ºC to +250ºC