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Welcome to Praecis™ Engineering—
Customized environmental controls for rooms and chambers.

Custom enclosures controlling
temperature, humidity, filtration, vibration, and shielding—
all integrated into a single device.

Temperature conrol to ± 0.005 °C.

The core of the Praecis Environment system, the Praecis Air Temperature Control Unit (ATCU) maintains the Critical Point stability up to ± 0.005 °C..

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Præcis uses a laminar-flow air shower to hold the temperature at the Critical Point

Praecis Environment: Total climate control.

Praecis builds customized environmental enclosures that require precise air temperature, humidity, filtration, and pressure.

A Praecis system can maintain a Critical Point anywhere within the enclosure to the following:

  • Air temperature to ± 0.005 °C.

  • Humidity to ± 0.1% RH.

  • ISO cleanroom standard 14644-1 down to Class 1.

  • Pressure to ± 1 Pa.

Praecis delivers complete turnkey systems. Our systems do not require user interaction and will operate indefinitely without adjustment. If there is a significant change in the operating conditions or ambient variables, Praecis can monitor and adjust the system control software from our headquarters.

Quantum Computing
Semi-Conductor Fabrication
Optics Manufacturing
In the above example, the Praecis system maintained a temperature ratio of 150:1 (room temperature and critical point). The blow up shows a period of ten hours with no disturbances—the Praecis ATCU maintained the critical point temperature to within…

In the above example, the Praecis system maintained a temperature ratio of 150:1 (room temperature and critical point). The blow up shows a period of ten hours with no disturbances—the Praecis ATCU maintained the critical point temperature to within 0.002 °C.

Who is using Praecis Environment systems?

Some of our clients:  3M, Aerospace, Aerotech, Ametek, Apple Computers, Chinese Academy of Sciences, Coherent Inc., Hewlett Packard, Intel, Johnson and Johnson, Konica Minolta, India Space Agency, NASA, nanoPrecision Products, NiPro, Ophir Optronics, OPCO Laboratory Optical Components, Optometrics, Physik Instrumente, Precision Optechs, Precitech, Pennsylvania State University, Shanghai Institute of Optics and Fine Mechanics,  Spanish Institute of Space Sciences, TNO Scientific Research.

Learn more 

<span style="color:rgba(0,174,239,1);font-family;Europa; font-size:1.33em">Praecis ATCU:<br>Ultra-precision air temperature control.</span>

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