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The PD2 by Rosahl is a compact flat-membrane dehumidifier module for volumes of up to 2 litres.
Like all Rosahl dehumidifiers the PD2 is based on a solid-state polymer membrane. When supplied with a 3V DC voltage, moisture on one side is being decomposed into Hydrogen ions and Oxygen, the Hydrogen ions pass the membrane and recombine with air Oxygen to moisture again on the other side and get discharged.
The Rosahl PD2 dehumidifer requires a 3V DC supply voltage and draws in continous operation i.e., when the moisture level in the volume stabilized to a low level, just around 80mW power.
Due to the membrane being intrinsically hygroscopic, it absorbs humidity if no supply voltage is present. This moisture needs to be discharged on startup and leads to a significantly higher inrush-current that the regular operating current. During startup the supply voltage shall still not drop below 2V, otherwise moisture discharge is not possible or significantly delayed. Suitable current supplies are fold-back current limiting sources, which regulate the output current further down than pure constant current sources and hence maintain a certain output voltage. We provide suitable USB-C voltage regulator modules with fold-back current limiting:
Applicable Volume | ~2000ccm (2l) |
Dehumidifying Performance | 84mg/day |
Supply Voltage | 2.9-3.3VDC |
Power Consumption | 80mW (20°C/60%rH) |
Rated Current | 50mA (dep. of rH) |
Inrush Current | 500mA |
Operating Temperature | -10°C - +50°C |
Connecting Type | Soldering |
Manufacturer Information
RYOSAI TECHNICA CO., LTD., 8-1-1 Tsukaguchi-Honmachi, Amagasaki-City, Hyogo, 661-0001 Japan, Email: ryosai_sales@ryoyo.co.jp
This Product was added to our catalogue on 21/11/2024.