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Air Temperature Control Unit-18

The ATCU-18 accommodates enclosure:
Area: Up to 17 m² 
Volume: Up to 34 m³ 

ATCU-18 All

Ultra-Precision Temperature Control
For cleanrooms and large precision equipment.


•  We guarantee that a Præcis air temperature
    control system will maintain the temperature
    at the Critical Point to 0.01 °C p-v (± 0.005).

• . Præcis systems provide long-term temperature
     stability and do not require operator
     intervention. The ATCU screen displays the
     temperature in real time, and if the temperature
     should go out of range, the ATCU will sound an

•  If your Præcis Environment system should need
    adjustment, Præcis provides remote tuning from
    its headquarters.

  ATCU-18 maximum enclosure size.

ATCU-18 maximum enclosure size.

ATCU-18 Specifications



Stability at Critical Point: ± 0.003 °C.
Set-point: Troom ± 2 °C.
Set-point Resolution: 0.001 °C.
Operating Conditions: 18 - 22 °C.
Air Flow Rate: 20 - 120 m³/min.
Sound Level: 66 dba.
Dual Settings: For different environment conditions, such as winter/summer.


Voltage:  230 ± 10% V.
Phase:  1 or 3.
Frequency:  50 or 60 Hz.
Nominal Current - Cooling:  36/15 A.
Nominal Power Consumption:  6.2/4.7 kW.
Breaker/Fuse Size:  70/25 A.
Supply Power Wire Size:  6/12 AWG.


Refrigerant Type:  R-407c.
Refrigerant Charge:  1.7 kg.

Enclosure Size

Enclosure area:  Up to 17 m².
Enclosure volumeUp to 34 m³.


Height:  2.49 m. 
Height without vent:  
2.34 m.
Depth:  0.92 m.
Width:  1.26 m.
Sensors:  Eight.
Width without handles:  1.18 m.
Weight:  305 kg.
Air damping:  Automatic.
Condensate:  Pumps to remote location.
HEPA Filtration:  Optional.

User Interface

Computer Screen:  10.4-in touch-screen.
Data storage:  Thermograph/PC.
Data recording format:  Excel, text. 
Channels:  Up to 8 channels of data.
Software:  Robust and user-friendly.
High/Low temperature alarm:  Yes.
Selectable sampling intervals:  Yes.
Moving average filtering:  Yes.
Adjustments:  Programmable set points.
Remote tuning from Præcis:  Yes.
User manuals:  English.