Environmental Test Chamber

Air Conditioning Unit Chambers

Thanks to ACS Air Conditioning Unit Chamber, it is possible to simulate the desired temperature and humidity inside the chamber and push the moisture into an external testing unit.
The chamber can operate in either stand-alone mode, in which the chamber functions autonomously with its temperature and humidity control, or in remote unit mode, where the chamber acts as an air conditioning generator.

Air Conditioning Unit Product Range

The chamber models indicated in the table below can be provided in Air Conditioning Unit configuration:

Field T -40/+180°C Field T -20/+180°C Field T -40/+180°C Field T -40/+180°C Field T -70/+180°C
DM340 (T)
DM600 (T)
DM1200 (T)
DM1600 (T)
DM340 E
DM600 E
DM1200 E
DM1600 E
DM340 (T) ES
DM600 (T) ES
DM1200 (T) ES
DM 250 C (T) ESS
DM 500 C (T) ESS
DM 1000 C (T) ESS
DM 1400 C (T) ESS
Field T -70/+180°C   Field T -70/+180°C Field T -70/+180°C  
DM340 C (T)
DM600 C (T)
DM1200 C (T)
DM1600 C (T)
  DM340 C (T) ES
DM600 C (T) ES
DM1200 C (T) ES
FM340 C
FM600 C
FM1200 C

Air Conditioning Unit Datasheet

Please refer to each specific datasheet by clicking on the interested model and adjusting the performance according to the Air Conditioning Unit datasheet chart.


Air Conditioning Unit Datasheet Chart

General featuressingle stage modelsdouble stage models (C)
Increase of external dimension (H) respect to the standard 550 550
Flow rate external fan 600 600
Pipes length 2 x 4 2 x 4
Min temperature in the chamber (2) -35 (-154) -70° C
Max temperature in the chamber (2) 180 180
Decrease rate of change performance (2) 10 10
Humidity range (2) (5) +10 ÷ +90 +10 ÷ +90
Humidity range (2) (5) 10 ÷ 95 10 ÷ 95
Dew point range (2) (5) +4 ÷ +90 +4 ÷ +90
Min temperature (1) (3) -30 (-104) -50
Max temperature (1) (3) +150 +150
Humidity range (1) (3) (5) +20 ÷ +80 +20 ÷ +80
Humidity range (1) (3) (5) 20 ÷ 80 20 ÷ 80
Dew point range (1) (3) (5) +5 ÷ +75 +5 ÷ +75

(1)  Measured values at the end of the pipes with the by-pass configuration
(2)  Measured values with covers configuration
(3)  Measured value with external pipes configuration
(4)  Min temperature for E models
(5)  Only for climatic chambers


Control and management system and interfaces
Controlled by PLC and Advanced HMI.

Remote access
There is a wide range of possibilities thanks to the built-in MyKratos™ and MyAngel24™; multichamber control also available upon request.

Electromagnetic closing system

Ensures the security of environmental tests.

Air treatment system
Ensures a precise control of the climatic parameters inside the chamber with minimal thermal inertia; an axial fan allows rapid temperature variations of both air and specimen.

Humidification system (only climatic version)

The humidifier with a self-contained heater and dedicated controlling S/W offers two great advantages:
- it does not require distilled or demineralised water to operate properly
- it uses ‘dry’ vapour in order to avoid condensation on the specimens and to reproduce real environmental conditions

Air circulation system:
This system is equipped with an air circulation fan that draws air from the chamber environment and sends it to the external unit.

Flexible hoses:

The flexibility of these hoses allows the customer to position the external unit according to his needs; their insulation guarantees optimal performance.

Service panel:

The system is equipped with a PT100 temperature probe that can be moved to any area of the external unit, and an electronic chamber alarm thermostat.


Complete basic configuration

  • MyKratos™ and MyAngel24™: top of  the line HMI for remote control 
  • 10'' touch screen on-board display
  • Inspection window: multiple-crystal, with double heated transparent film, 550 h X 450 mm size 
  • Ecological refrigerant gas in line with EU Regulation 517/2014
  • Internal lighting
  • Self feeding system (tap water through chamber embedded softener)
  • Wheels and feet
  • Electromagnetic closing system
  • Silicone portholes: 80 mm (left side) and 150 mm diameter (right side) fitted with silicone cap. They allow internal-external electrical, mechanical or hydraulic connections.
  • Digital min./max. thermostat: with independent probe
  • No. 1 internal grid shelf
  • Auxiliary contacts (specimens, alarms)



Request an Offer



  • Additional portholes: 80 and 150 mm
  • Water condenser: for the chambers which are normally equipped with air condenser.
  • UV lamp: for ageing tests on painted surfaces, plastic materials, rubber, etc.
  • Handling port hole: Ø125 mm, positioned on the door near the inspection window. It allows handling specimens inside the chamber (available for models from 500 litres up).
  • Internal shelves: AISI 304 stainless steel, adjustable in height, grid shelves to be added to the one supplied.
  • Reinforced floor: max 500 kg distributed load
  • Notch 50x70mm
  • Set of no. 4 analogic inputs 0÷10 V for user’s data acquisition (no. 1 set max)
  • Set of no. 4 PT100 inputs (no. 1 set max)
  • Set of no. 4 PT100
  • Set of no. 8 auxiliary contacts (no. 1 set max)
  • No break power unit for PLC
  • Compressed air dehumidification kit
  • Capacitive probe: RH Controlling and monitoring (activated by control system)
  • Temperature and Humidity (for climatic chambers) analogic retransmission
  • Temperature extension to +200° C
  • Air fan motor speed adjustment
  • Specimen switching off in case of chamber alarm
  • Air flow booster
  • Capacitive Probe: Capacitive probe for monitoring and control relative humidity inside the external box
  • MyKratos Multichamber: software, installed on a PC, for monitoring and control multiple chambers (to be supplied upon request)

chamber floor loading and specification details

  • Max. floor load 100 kg/m² approx. (equally distributed)
  • Max. load of the shelf 50 kg approx. (equally distributed)
  • Internal test space is made of stainless steel (material 1.4301, equivalent of AISI 304)
  • All seams are TIG welded and vapour tight

air treatment system

System includes the following components:

  • Cooling evaporator
  • Heating system
  • Dehumidification system (only climatic version)
  • Thermoregulation air circulation fan
  • Temperature and humidity probe


Mechanical cooling based on single stage system (-40°C) or cascade systems (–70°C). The cooling system is realized with semi-hermetic alternative type compressors including an automatic injection-type protection system. This protects the compressors when they are cooling down from high temperatures.


The chamber is heated by means of electrical heaters, protected by safe thermostats that disconnect overall chamber main power components (such as compressors, fans and heaters) in case of accidental over-temperature.

humidification and dehumidification (climatic models)

Direct humidification occurs through an electrical vapour humidifier.
The chamber is equipped with a water storage tank (about 18 l capacity) and a water connection on the back of the chamber for automatic refilling.

There are three ways to ensure the water supply needed for any kind of climatic tests:

  • Connecting the chamber to normal tap water network by means of suitable water connection
  • Manually refilling the tank with demineralised water
  • Connecting the chamber to demineralised network

In order to reduce water consumption, water recycling can be activated through a button on the control panel (only possible when the specimen does not contaminate the water during the test).
Dehumidification is performed by the condensation cooler (dew point cooler) directly connected to the refrigeration circuit. This principle permits high stability of parameters in conjunction with energy-efficient dehumidification.


Temperature Measurement with Pt100 thermal probe Class A, max precision 0,3K.
Relative humidity measurement with Assmann psychrometric system complete with Pt100 thermal probes. 
Relative Humidity range from 10% to 95% within the temperature range [+10°C; +90°C].

  •          AREA 2, Range in Stand-Alone configuration (with covers), DEW POINT (5)+4 ÷ +90°C
  •          AREA 3, Range in Air Conditioning Unit configuration (with pipes), DEW POINT(1) (5)+5 ÷ +75°C

The values refer to the basic version at ambient temperature of +22°C, with temperature and humidity measurement made in the air inlet.

(1)  Measured values at the end of the pipes with the by-pass configuration

(5)  Only for climatic chambers


The chamber is equipped with a PLC (Programmable Logic Controller) for managing all the chamber’s functions and safety interlocks. The HMI system consists of a 10'' on-board panel and a remote control via mobile and desktop devices. MyKratos™ software (including MyAngel24™ Interactive Assistance System), is available both from the on the on-board panel and remote devices with the same user-friendly graphical interface. 

On-Board Panel: 10'' Touch Panel, 16 M colours with a touch menu with related pop up screens, allowing the control of all the chamber functions. 



Learn More on My Kratos Control System


Configure your test chamber

Type of chamber

Air Conditioning Unit

Temp. Changing Rate
(K/ min) Heating/ Cooling

User guide

Next Step

Reset configurator

Subscribe to Newsletter

Let's subscribe to ACS newsletter to be up-to-date on the latest news, product launches and promotions.