90.7031 Humidity and temperature converter 907031/20-1-15-021/000 90.515- F12
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Measuring transducers of relative humidity (with hygrometric polymer fibers) and temperature
(current, voltage) or with a temperature resistive output
100% (channel version)
(without regeneration) Humidity measuring transducers of the series 907031 hygroscopic properties of special polymer fibers are used to measure air humidity. The polymer fiber sensing element is capable of absorbing moisture. The external manifestation of this process that can be measured is the change in length. A precision mechanism registers a humidity-dependent change in length and converts it into a mechanical movement of the potentiometer slider. A linearized (bridge circuit) resistive signal is applied to the output terminals of the converter The values of the resistive humidity output signal range from 100 ohms to 138.5 ohms, which is an analog of the calibration characteristic of the Pt100 resistance thermometer. This allows the humidity converter to be connected to standard measuring instruments, regulators, recorders for processing the measured signal, originally intended for recording and measuring temperature Other versions of the device with a different output resistive characteristic from the standard, with a normalized output signal for current or voltage, as well as with an additional temperature measurement channel, complement the production line Humidity measuring transducers are suitable for both ventilation and air conditioning applications, and for industrial applications. A special advantage of this series of transducers is that the sensor element is resistant to water, which allows the device to be used in conditions of high humidity up to the saturation level. Under normal atmospheric conditions, the sensor element requires almost no maintenance. Any contamination resulting from the presence of an element in a dust-saturated environment can be washed away with water. The operating range of the sensor element is 30-100% rH at an acceptable ambient temperature of -40...+80 °C. The version of the device with a resistive output has additional advantages, related to the absence of the need for the installation of the device. The main areas of application are ventilation and conditioning, tasks of humidification and drying, application in fruit and vegetable storages. |
