Membrane product range
Rosahl membranes
Five ranges are available depending on the type of installation and size of enclosure. They are:
PD2/3 Series for dehumidifying enclosures up to 2 litres.
See table below for specification and performance.
Types PD2 and PD3 are a screw-in membrane dehumidifiers suitable for dehumidifying enclosures up to 2 litres. The PD2 has soldered connectors and PD3 has push connectors. Both models use a fine pitch M12 fixing (M12 x P0.5). The flange diameter is 17mm and length 11mm and no gasket is supplied. A 3V dc power supply is required. Optional locking rings are available of required.
2. RD Series for dehumidifying enclosures up to 2 litres.
See table below for specification and performance.
Type RD is a flat membrane dehumidifier also for enclosures up to two litres and measures 24 x 30 x 5.5mm. The standard version is model RD3 which is designed to be mounted on the outside of the enclosure. Model RD4 is almost identical but designed to be installed inside the enclosure to be dehumidified: a gasket is supplied. A 3V dc power supply is required.
3. RS Series for dehumidifying enclosures up to 5 litres.
See table below for specification and performance.
The type RS is a flat membrane dehumidifier for enclosures up to five litres and measures 21 x 28 x 13.5mm. The RS1 uses soldered terminals and the RS2 uses push connectors. They both mount on the the outside of the enclosure. Model RS1 and RS2 have the same dimensions and only differ in the electrical connections . They need a 3V DC power supply.
4. Type MDL for dehumidifying enclosures from 0.5 to 2m³.
See table below for specification and performance.
The MDL Series is a thin flat membrane dehumidifier 2.3mm deep and available in three models according to enclosure size. Volumes over 2m³ can be controlled using two or more membranes. A 3V dc current limiting power supply is required. MDL models are normally installed inside the enclosure.
5. New M Series for dehumidifying enclosures from 0.25 to 4m³.
See table below for specification and performance.
With a wider range of seven models and simpler installation, the new M Series membranes are mounted in pre-drilled stainless steel frames and supplied with a pre-formed gasket. As with the existing MDL Series, multiple membranes may be used for larger enclosures. A 3V dc current limiting power supply is required. M Series models are normally installed inside the enclosure.
| M-Series | M-1J1R | M-2J1R | M-3M1R | M-3J1R | M-5J1R | M-7J1R | M-10J1R |
|---|---|---|---|---|---|---|---|
 |  |  |  |  |  | ||
| Dehumidifying (grams/day)*1 | 1 | 2.0 | 2.9 | 4 | 8 | 16 | 29 |
| Applicable volume m³ See note *2 | <125 litres | <250 litres | <350 litres | <500 litres | <1 m³ | <2 m³ | <4 m³ |
| Element voltage | 3V DC | ||||||
| Power consumption (W) *3 | 1.0 | 1.5 | 2 | 2 | 3 | 6 | 12 |
| Dimensions (mm) *4 | 52.5 x 50 x 16.5 | 67.5 x 50 x 16.5 | 65 x 62 x 16.5 | 74 x 58 x 16.5 | 89 x 84 x 16.5 | 117 x 105 x 17.5 | 162.5 x 155 x 17.5 |
| Dimensions (mm) including terminals height/width/depth | (67.5 x 50 x 15.5) | (65 x 62 x 15.5) | (74 x 58 x 15.5) | (89 x 84 x 15.5) | (117 x 105 x 16.5) | (162.5 x 155 x 16.5) | |
| Weight (g) | 70 | 85 | 90 | 95 | 150 | 340 | 580 |
| Operating temperature | -10 to +50C | -10 to +50C | -10 to +50C | -10 to +50C | -10 to +50C | -10 to +50C | -10 to +50C |
| Terminals | Push connector | Push connector | Push connector | Push connector | Push connector | Push connector | Push connector |
| *4 Height x Width x Depth. Including terminals |
Notes
*1 The initial value at the temperature of 30°C and humidity of 60%. (The dehumidifying capacity of the membranes will degrade over time depending on the operating environment
*2 IMPORTANT: When selecting Rosahl membranes for a container, the volume and target humidity are critical to avoid under performance. To achieve low humidity levels, oversizing the membrane for a given volume is needed. Minimising the ingress of moist air into the container is also important See Selection table here
*3 The annual average power consumption in average conditions in Japan.
Rosahl
micro-dehumidifier
micro-Entfeuchter
micro-déshumidificateur
micro-deshumidificador
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Westside International Ltd
Registered in England
Registration No. 4018025
VAT No. 768327395
EIN 98-1234498