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Temperature Transmitter with High Insulation and Pt100 Sensor Input - P44000

The P44000 temperature transmitters are designed for precise temperature measurement on high electrical potential up to significantly more than 1000 V.

When temperatures are measured using Pt100 resistance thermometers in high-voltage environments, standard temperature transmitters are often unsuitable due to their insufficient insulation.

Resistance thermometers can be insulated against high voltage. In practice, however, the available installation space is often too small. Moreover, the insulation is weakened by thermal and mechanical aging.

For temperature measurement on power electronics components, P44000 provides maximum safety by high-voltage resistant galvanic isolation. A typical application is the monitoring of the winding temperature of electric motors, generators or transformers.

The new P44000 transmitters convert the resistance of a 2-, 3- or 4-wire Pt100 resistance thermometer into a 4 to 20 mA signal with high accuracy and short delay times.

The output signal is galvanically isolated from the input signal and the voltage supply. The isolation is designed for working voltages of up to 6.6 kV AC/DC. During routine testing, the test voltage is 15 kV AC. Vacuum encapsulation protects the circuit against environmental influences and ensures that the extraordinary isolation properties are maintained.

The product line covers the standard ranges of 0 to 150 °C, 0 to 200 °C and 0 to 300 °C. The transmitters are available in 67.5 mm and 22.5 mm modular housings to suit different requirements.

Key features

Transmitters for Pt100 temperature sensors with 2-, 3- or 4-wire connection

Fixed range models for 0 to 150 °C, 0 to 200 °C and 0 to 300 °C input ranges

Impressed output current of 4 to 20 mA

Compact modular housings: 67.5 mm (D3) and 22.5 mm (D1)

High isolation up to 6.6 kV AC/DC basic insulation and up to 2.5 kV AC/DC reinforced insulation with overvoltage category III and pollution degree 2 (input against output and power supply)

22.5 mm housing for less demanding isolation requirements up to 2 kV AC/DC (basic insulation)

Measurement error of just ±1 K (typically ±0.5 K) and short T90 delay time of 100 ms

Broad-range power supply for 22 ... 230 V AC/DC ensures safe operation even with unstable power grids

Resistant to environmental influences through vacuum encapsulation

Suitable for extreme environments: ambient temperature during operation –40 ... +85 °C

5-year warranty

Family-owned company with high quality standards

We have been developing, producing and selling high-quality products and services, with a focus on interface technology and process analytic for more than 80 years. As a family-owned and run company with more than 300 employees, the city of Berlin has been the center of our economic activities since our inception in 1945.

Our innovations are based on an intensive exchange of knowledge and expertise between us and our suppliers, customers and sales partners. Our “Knick transducer”, for example, has been a synonym for high-precision transmitters for decades, and in modern liquid analysis, Memosens technology has been established as process standard.

Temperature Transmitter with High Insulation and Pt100 Sensor Input - P44000