Temperature sensors for high measurement requirements
When you choose a temperature sensor from SEIKOM Electronic, you can rely on years of expertise, in-depth professional competence and an extensive range of products that are 100% "Made in Germany". From outdoor temperature sensors to duct temperature sensors, you will find exactly the temperature sensor you need for your processes. Take a look around and get your non-binding offer.
Sophisticated temperature measuring devices from professionals
The foundation stone for SEIKOM Electronic was laid over 30 years ago. Since then, we have developed into one of the leading providers of innovative measurement and control technology. From temperature measurements with temperature sensors to pressure measurements with pressure transmitters and air quality measurements to HVAC systems, we offer high-quality equipment in our portfolio. Today, we are the first point of contact with TÜV-tested quality and equipment that we offer with Safety Integrity Level (SIL) 1 and 2 as well as explosion protection (ATEX) certification. In addition, our professional services include advising you individually at all times, ensuring a high degree of speed and taking care of your special requests.
What does a temperature measuring device offer?
A temperature sensor is one of the most important tools when it comes to detecting temperature differences and converting them into a measurable signal. Once a temperature measuring device has recorded and output a temperature, you can then process the signal further or use it immediately to control processes . Depending on the area of application for which you need a temperature sensor, it comes with different measuring principles , be it the resistance or thermoelectricity principle.
Which temperature sensors are the right ones?
Temperature sensors are divided into active temperature sensors and passive temperature sensors. With the former, sensors actively detect temperature-related changes in their environment themselves. This variant is mainly used in industrial and private control technology . The output signal is provided as a current signal (4-20 mA) or as a voltage signal (0-10 V). A temperature transmitter is embedded in the sensor itself, which converts the measured resistance values into the linear output signal.
A passive temperature sensor requires an additional energy source to detect changing temperatures in the environment. Such a temperature measuring device with passive sensors can have a resistive, capacitive and inductive sensor. Outdoor temperature sensors are an example of resistive sensors. Capacitive sensors are dependent on electrical capacitance, while inductive sensors generate an electromagnetic field.
Depending on the option, temperature sensors measure temperatures without contact or require a contact point. The best known include thermocouples, resistance thermometers (RTD) and thermistors.
Thermocouples are made up of two wires of different metals or alloys that are connected to each other at one end. They work according to the principle of comparative measurement and have a measuring point and a reference point. If the temperature at the measuring point differs from that at the reference point, an electrical voltage arises between the two wires, which is generated by the Seebeck effect . The recorded value can then be interpreted via the temperature sensor using a measuring instrument and converted into a temperature.
Resistance thermometers as temperature sensors, often referred to as RTDs (Resistance Temperature Detectors), measure temperature by using the change in electrical resistance of a metal conductor (often platinum) with temperature. The resistance of the platinum wire increases linearly with temperature. The best-known RTDs are Pt100 and Pt1000, where the resistance at 0 °C is exactly 100 ohms. RTDs are particularly well known for their high accuracy and stability . However, they generally react more slowly to temperature changes than thermocouples.
In contrast to RTDs, which are made of metals, thermistors are known among temperature sensors as semiconductor sensors . Their resistance change with temperature is strongly non-linear, which gives them high sensitivity in narrow temperature ranges. There are two main types of thermistors: PTC (Positive Temperature Coefficient), whose resistance increases with increasing temperature, and NTC (Negative Temperature Coefficient), whose resistance decreases with increasing temperature. NTC thermistors are the most commonly used and are characterized by a fast response time and high accuracy over limited temperature ranges. They are often found in household appliances, medical equipment and electronic devices, where they are used for temperature control and monitoring. As the temperature sensors can only monitor a limited range, they are designed for very narrow temperature ranges.