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Bayonet RTD Pt100s - Mineral Insulated (Type 71A)

Plastics Industry RTD Pt100 Sensors

RTD, PRT, Pt100 Sensor Mineral Insulated Bayonet

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Suitable for plastics machinery and general purpose applications these bayonet RTD Pt100s are available as standard in tolerance classes B or A with an industry standard one slot adjustable bayonet cap fitting. The fitting can be fine tuned for positioning on site and is suitable where several applications in your plant require individual positioning of the assembly. The sensor is mineral insulated with a diameter of 4.5mm as standard but a 3.0mm option is available and rated to 350°C and can therefore be bent after installation for exact positioning (but not near the tip). A choice of leads is available including stainless steel braided cable (SSB) or flexible stainless steel conduit (SSC). Available as a 3 or 4-wire configuration.

Mineral Insulated Bayonet Enquiry Form

1. Tolerance of Element

	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

2. Wiring Configuration

	Wiring Configuration (IEC 60751)	Select
3	3 wire (most popular)
4	4 wire

3. Sheath Diameter

4. Sheath Length 'L1'

mm

5. Cable Length 'L2'

mtrs*

6. Optional Plug Style

Illustration	Select
CE7 - Miniature Plug Plastic, rated to 220ºC (normal)
CE6 - Standard Plug Plastic, rated to 220ºC (normal)

7. Quantity Required

Qty Required

Contact Details

Company Name

Your Name

Title/Dept.

Email

Telephone

Additional Information

If your enquiry is for more than one style of sensor, please email us with your requirements or use the box below

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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!