PMCG constant humidity generator

Article no.
PT-PMCG
€3,510.50 €2,950.00
Delivery time:
4-5 weeks
For keeping constant the relative humidity in museum showcases up to 4 m³. Maintenance free without water tank.
PMCG constant humidity generator is available to buy in increments of 1

PMCG - Active microclimators for museum showcases

The PMCG range of active microclimators is a novel way of keeping the humidity in museum cabinets constant. The functionality of PMCG devices is based on solid state technology. The big advantage over other devices is that the PMCG units can run for many years without the need to fill or empty a water tank. After installing the unit, the humidity in the showcases will be kept constant for years without having to control the amount of water, add water or perform any other maintenance. Humidity values of <20% to 65% RH can be set at room temperatures from 0°C up to 40°C.

The PMCG units have a modular structure: A main unit (master module) can be connected to numerous expansion units (slave modules) in order to achieve the necessary performance for the respective application. Due to this modular design, the customer pays only the really required capacity. The devices are extremely quiet (<19 dB), their power consumption is extremely low and they need no special ventilation.

Models

The model ist selected according to the volume of the showcase to be conditioned:

Modell Showcase volume (max.)
Dimensions (H x W x D)
Weight (kg)
PMCG 2 2 m³

150 x 105 x 277 mm (horizontal arrangement)

173 x 105 x 252 mm (vertical arrangement)

1,4
PMCG 4 4 m³

150 x 105 x 343 mm (horizontal arrangement)

173 x 105 x 318 mm (vertical arrangement)

2
       

Our comment: these numbers seem a bit optimistic to us, especially for model DH. All data is just valid under certain conditions, such as an air tight built showcase with an air exchange rate of 0,1 per day.

 

Further Options to choose from:

  • DD - only suitable for dehumidification. DD units are the ideal solution for a very dry showcase climate (eg 17% rh) and if the humidity of the ambient air is always higher than the desired humidity in the showcase.
  • HH - only for humidification. HH devices are suitable for applications in which the desired humidity in the showcase is always higher than that of the ambient air.
  • DH - suitable for dehumidification and humidification. DH devices can be used for all applications. This model always only uses one of the two membranes. Therefore it only has got half the efficiency of above models.

Standard connection arrangement: one connection on the rear, one connection on the top of the machine.

  • Vertical arrangement with hose connectors on top of the machine
  • Horizontal arrangement with hose connectors on the back side of the machine

 

Installation / Operation

The device does not require constant monitoring. The device works without liquid water, so no water level has to be monitored, as is the case with other devices.

The PMCG devices can be placed in the immediate vicinity of the showcase (eg in the base of the showcase base). The instrument is connected to the showcase by 2 hoses with 20 mm inner diameter. Apart from sufficient ventilation of the space where the PMCG devices are housed, no further special features need to be considered. The power supply is mains current 240 V / 50 Hz.

The time required for the PCMG to set a specific humidity value in a showcase depends on several factors in addition to the display cabinet size:
- Humidity values <25% RH require more time than humidity values between 35-55%.
- Volume and air tightness of the showcase.
- Humidity difference between showcase and ambient climate
- Quantity of hygroscopic materials inside the showcase. Large wood panels and the like can drastically extend the time required to acheive the desired humdity level. Once the desired humidity is reached, the machine will be able to keep it stable.

The PMCG can be used in combination with silica gel. As a result, the  showcase climate remains constant even in the event of a power failure and also in the event of a device defect / or during maintenance breaks. The silica gel will be automatically adjusted to the desired moisture level over time by the PMCG.

The devices are ideally connected in an upright position. In this position, the life of the device can be assumed to be more than 10 years.

 

Delivery

  • PMCG master device
  • Humidity sensor with cable (1.8 m) and telephone plug 3.5 mm
  • Power cord (1.8 m) with standard computer 3-pin plug and grounded European power plug. Other plugs available without surcharge - please let us know what you need. 
  • Silicone air hose 2 m
  • Hose adaptor with gasket
  • WIFI antenna

 

Example: maximum showcase sizes of the individual PMCG 2 models (manufacturer data)

model Showcase volume (target value <25% rh) Showcase volume (target value> 25% rh)
DD 1.25 m³ 2.25 m³
HH 1.25 m³ 2.25 m³
DH 1.0 m³ 1.75 m³

Our comment: We would recommend DH for showcases up to 0,5 m³ maximum.

All data are based on the assumption of a well fitted showcase with an air exchange rate of 0.1 per day. When using slave modules, care must be taken that they have the same mode as the master module (DD, HH or DH). However, different performance variants can be used together. The data in the table above are indicative only. Please contact us before opting for one of the models.

 

Warranty

Four year warranty by exchange. The guarantee is unlimited in the first year. During the following three years, the customer will be charged for freight and delivery costs for repairs and replacement. The warranty on the humidity sensor is one year. We recommend having the sensor checked or replaced after 2 years. All warranty claims will be voided if the unit has been opened or exposed to large amounts of water.

THERE ARE ONLY SERVICE-FREE COMPONENTS INSIDE.

 

 

Specifications
Data transfer WIFI, Cloud
Futher Properties
Model PMCG 2 PMCG 4 PMCG 8
Showcase Volume (max.) 2 m³

4 m³

8 m³

Dimensions Vertical Arrangement (H x B x T)

173 x 105 x 252 mm

173 x 105 x 318 mm 173 x 202 x 318 mm
Dimensions Horizontal arrangement (H x B x T) 150 x 105 x 277 mm 150 x 105 x 343 mm 150 x 202 x 343 mm
Power Connection 100 - 240 V, 50 - 60 Hz, 1.5 A
Power Consumption (max.) 16 W 25 W 50 W
Achievable RH level <25% - 65 %
Permissible Ambient Conditions for Operation 0 - 60 °C
Sensor Accuracy
±3%
Noise Emmission <25 dB
Weight 1.4 kg 2 kg 3 kg
Dehumidifying Power DH Model (g/d) 40 80 160
Dehumidifying Power DD Model (g/d) 80 160 320
Display
Touchscreen

Delivery Device incl. 1 humidity sensor with 1.8 m cable (master only) and telephone plug 3.5 mm (M1-C), 1 power cable (1.8 m) with standard computer 3-pin plug and grounded europ. Power plug (MP-E), 1 silicone air hose 2.5 m (MH), hose adapter with gasket (ME-1), CD with user manual and SD card.
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