Transmitters have developed from sensors that can output standardized signals. The ETS 4100, an electronic temperature transmitter, features a sturdy design, making it especially well-suited for temperature measurements in industrial hydraulics scenarios. By employing a PT 100-based temperature sensor and corresponding evaluation electronics, it can measure temperatures within the range of -25°C to +100°C. Standard 4…20 mA and 0…10 V analog output signals are provided, facilitating integration into modern control systems. The ETS 4000, with a pressure resistance of up to 600 bar and outstanding EMC performance, is highly suitable for use even in severe environments. The ETS 4548-H, an electronic temperature transmitter with HSI sensor detection, is designed to be used in conjunction with HYDAC measuring devices such as HMG 500, HMG 510, HMG 3000, and CM ∪1000. For data transfer, the ETS 4548-H is equipped with an HSI interface (HYDAC Sensor Interface). This enables the HSI sensors to be automatically recognized by the aforementioned HYDAC measuring devices, and all essential basic device settings are promptly and automatically executed. Variants with pressure-resistant encapsulation and triple certification in accordance with ATEX, CSA, and IECEx are widely employed in hazardous environments.

Temperature transmitters

Temperature transmitter function:

　　A device that converts a physical measurement signal or a common electrical signal into a standard electrical signal output or a device capable of outputting a signal by means of a communication protocol. Temperature transmitter is the temperature variable is converted into a standardized output signal can be transmitted instrumentation, mainly used for industrial process temperature parameter measurement and control. Current transmitter is to be measured by the main loop AC current into a constant-current

　　The current transmitter converts the measured main loop AC current into a constant current standard signal, which is continuously transmitted to the receiving device.

Hygienic thermometers

　　2.Germany E+H temperature and current transmitter is the temperature sensor signal into current signal, connected to the secondary instrument, so as to display the corresponding temperature. For example, in the figure, the temperature sensor type for PT100, then the role of temperature and current transmitter is to transform the resistance signal into a current signal, input instrumentation, display temperature.

　　Potentiometer type displacement sensor, it through the potentiometer element will be converted to mechanical displacement and its linear or arbitrary function of resistance or voltage output. Ordinary linear potentiometers and circular potentiometers can be used as linear and angular displacement sensors, respectively. However, potentiometers designed for the purpose of measuring displacement require a definite relationship between the change in displacement and the change in resistance. Potentiometer type displacement sensors have movable brushes connected to the object to be measured.

　　The displacement of the object causes a change in resistance at the moving end of the potentiometer. The amount of change in resistance reflects the amount of displacement, and an increase or decrease in resistance indicates the direction of displacement. A supply voltage is usually applied to the potentiometer to convert the change in resistance to a voltage output. Wire-wound potentiometer because of its brush movement resistance to turn resistance as a step and change, its output characteristics are also stepped. If this displacement sensor is used as a displacement feedback element in a servo system, too large a step voltage will cause system oscillation. Therefore, in the production of potentiometers should minimize the resistance value of each turn. Another major disadvantage of the potentiometer sensor is easy to wear. Its advantages are: simple structure, large output signal, easy to use and inexpensive.

　　Magnetostrictive displacement sensors accurately detect the absolute position of the movable magnetic ring through non-contact measurement and control technology to measure the actual displacement value of the inspected product; the sensor’s high accuracy and high reliability has been widely used in thousands of practical cases.

　　Since the movable magnetic ring, which determines the position, is not in direct contact with the sensitive element, the sensor can be used in extremely harsh industrial environments and is not easily affected by oil, solution, dust or other contamination, with an IP protection rating of IP67 or higher. In addition, the sensor uses high-tech materials and advanced electronic processing technology, so it can be used in high temperature, high pressure and high oscillation environment. The output signal of the sensor is an absolute displacement value, even if the power supply is interrupted or reconnected, the data will not be lost, not to mention the need to re-zero. Since the sensitive element is non-contact, even if the detection is repeated, it will not cause any wear and tear on the sensor, which can greatly improve the reliability and service life of the detection.

Compact thermometers

　　3. Magnetostrictive displacement sensor, is the use of magnetostrictive principle, through the intersection of two different magnetic fields to produce a strain pulse signal to accurately measure the position. The measuring element is a waveguide, the sensitive element inside the waveguide is made of special magnetostrictive material. The measurement process consists of generating a current pulse inside the electronic chamber of the sensor, which is transmitted inside the waveguide, thus generating a circumferential magnetic field outside the waveguide. When this magnetic field intersects with the magnetic field generated by a movable magnetic ring that is applied to the waveguide as a change of position, due to the effect of the magnetostriction a strain-mechanical wave-pulse signal is generated in the waveguide, which is transmitted at a fixed acoustic speed, and is soon followed by a strain-mechanical pulse signal inside the waveguide. This strain mechanical wave pulse signal is transmitted and quickly detected by the electronic chamber.

　　Since the transmission time of this strain-mechanical wave pulse signal inside the waveguide is proportional to the distance between the active magnetic ring and the electronics chamber, this distance can be determined with a high degree of accuracy by measuring the time. Since the output signal is a true absolute value, rather than a scaled or amplified processed signal, there is no signal drift or change in value, much less the need for periodic rescaling.

　　Magnetostrictive Displacement Sensor is a high precision, long travel absolute position measurement displacement sensor manufactured according to the magnetostrictive principle. It adopts non-contact measurement method, because the movable magnetic ring for measurement and the sensor itself do not have direct contact, not to be friction, wear and tear, thus its long service life, environmental adaptability, high reliability, good safety, easy to system automation work, even in the harsh industrial environment, can also work normally. In addition, it can withstand high temperature, high pressure and strong vibration, and is now widely used in the measurement and control of mechanical displacement.

Thermowells

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