RTD temperature probe
introduction
RTD temperature probes (Resistance Temperature Detectors) provide accurate and stable temperature measurement in a wide range of industrial applications. RTD probes are typically made of copper (cable) or stainless steel. The sensing elements themselves consist of a resistive material, usually platinum. Due to their high reproducibility and long service life, they are particularly well-suited for the process industry, mechanical engineering, and building systems.
Choose the right RTD temperature probe for reliable temperature monitoring in your (production) process.
RTD temperature probe with terminal head
RTD temperature probe with cable
Accessories for RTD temperature probes
Frequently Asked Questions
Here you will find answers to the most frequently asked questions about RTD temperature probes
What is an RTD temperature probe?
What is a multipoint RTD temperature probe?
Pt100, Pt500 and Pt1000 - what are the differences?
What types of connectors are available for RTD temperature probes?
When should you choose an RTD temperature probe with a terminal head?
When should you choose a wired RTD temperature probe?
What is the advantage of an integrated transmitter?
What is the difference between screw-in and plug-in RTD temperatur probes?
What is the difference between a plug and bayonet connector?
What should you keep in mind when installing an RTD temperature probe?
<br/>
What is an RTD temperature probe?
An RTD (Resistance Temperature Detector) temperature probe operates on the principle of electrical resistance. This resistance changes depending on the temperature. RTD probes are highly reliable and can measure temperature with great accuracy.
<br/>
What is a multipoint RTD temperature probe?
A multipoint RTD temperature probe is a single temperature sensor with multiple measurement points. The difference between this and a dual or triple RTD is that, in a multipoint configuration, the measurement points are located at different locations within the sensor. This makes it possible to accurately map temperature distribution in processes or systems.
<br/>
Pt100, Pt500 and Pt1000 - what are the differences?
RTD temperature probes are often referred to as Pt100, Pt500, or Pt1000. These types differ in their nominal resistance. Note: This does not affect measurement accuracy. The difference lies in the nominal resistance:
Pt100: 100 ohms resistance at 0 °C
Pt500: 500 ohms resistance at 0 °C
Pt1000: 1000 ohms resistance at 0 °C
One of the main reasons for using an RTD with a higher resistance value is to minimize the impact of measurement errors in the measurement circuit, such as those caused by the connecting cable. The higher the resistance, the less impact the cable resistance has.
In our table, you’ll find the right model for your application.
<br/>
What types of connections are available for RTD temperature probes?
RTD temperature probes are available in various connection types and configurations. The difference lies in the measurement accuracy and the effect of cable resistance. We distinguish between:
2-wire: simple, but cable resistance affects the measurement
3-wire: partially compensates for cable resistance (most commonly used)
4-wire: highest accuracy, full compensation.
<br/>
When should you choose an RTD temperature probe with a terminal head?
A terminal head is chosen when robust cabling and good protection of the electrical connection are required, for example in industrial environments and process plants.
<br/>
When should you choose an RTD temperature probe with a connection cable?
RTD temperature probes with a connection cable are suitable for compact applications with limited space and for quick installation, such as in OEM applications and measurement setups.
<br/>
What is the advantage of an integrated transmitter?
A transmitter converts the sensor signal into a standardized output signal (e.g., 4–20 mA), which ensures:
• Better signal transmission over longer distances
• Greater resistance to interference
• Easy integration into control systems
<br/>
What is the difference between screw-in and insertion RTD temperature probes?
Screw-in probes are screwed securely into a process and provide a sturdy, pressure-resistant mounting. Insertion sensors are inserted into a process and are easier to remove or replace.
<br/>
What is the difference between a plug and a bayonet connection?
A plug connection is a quick electrical connection that can be easily disconnected—plug and play. A bayonet connection is a mechanical fastening in which the sensor is secured with a quarter-turn.
<br/>
What should you keep in mind when installing an RTD temperature probe?
During installation, it is important to consider the following:
- Correct positioning (measuring point)
- Protection against mechanical stress
- Minimal influence of environmental factors
- Proper cabling and connection
The most suitable connection for your application depends on the process conditions, mounting options, and maintenance requirements. Check out our selection guide to find the best option.
<br/>
Related news and information
Related documents
Innovative temperature measurement
Heating and Cooling Energy Management
Smart feature for temperature measurment
We'd be happy to help you!
do you have any questions?
Give us a direct call at:
Sales
T: +31 294 49 14 92
Service & support:
T: +31 294 49 14 93