Demands for increased quality in nearly every area of industry have led to more and more processes being conducted under clean-room conditions. Ensuring these conditions means monitoring room pressure, temperature and humidity. The new PUC 24 process monitoring device from halstrup-walcher has been specially designed for just such applications.

In essence, the PUC 24 is a differential pressure transducer that utilizes an inductive measurement principle to provide very high resolution of 0.1 Pa at a retest precision of 0.1%. Cyclical self-calibration of the zero point ensures proper measurement stability. The measurement range of ±100 Pa is freely scalable. Also available are inputs for temperature and humidity sensors; these can be set from 0-10 V or from 0/4-20 mA. All measurement values can be clearly read on a graphic LCD. Additional contact outputs are available for separate alarm signals. The device communicates with the master control module via a Profibus. The housing designed for front-flush installation is particularly innovative. Function keys are integrated into a stainless-steel keypad that forms a single smooth surface along the front of the housing. A mounting frame put in place when setting up the clean room makes the PUC 24 easier to install – four screws are all you need. This solution is the product of practical experience and simplifies more than just installation: the simple mounting system makes it possible to remove units quickly and effortlessly for calibration purposes or when switching units to accommodate changes in the process