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Air Temperature Control Unit-18

The ATCU-18 accommodates enclosure size range:

Area:  4 to 20 m² 
Volume:  8 to 40 m³ 

ATCU-18 All

Ultra-Precision Temperature Control For Drum Roll Lathes and Custom Build Cleanrooms.


• We guarantee that a Præcis air temperature control system will maintain the temperature control at the Critical Point to ± 0.003 °C.

• 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 alarm.

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

See ATCU-18 Maximum Enclosure Size

See 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:  4 to 20 m².
Enclosure volume:  8 to 40 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.