Silent Testing Screens, Hydraulic-Clamping

The fully enclosed Silent Testing Screen is lined with sound-damping material to reduce operational noise by 8–10dB. A sealed door with a heavy-duty adjustable latch and wear-resistant gaskets confines and controls airborne nuisance dust. Strong ferrite magnets secure the top cover in the open position for easy loading or secure it in the closed position during testing, further reducing dust and noise. This Testing Screen uses a proven and reliable quick-acting, hydraulic pump to securely clamp the screen trays for operation, while quickly releasing them for easy removal. A built-in electronic LED digital controller displays the time remaining and sounds an audible tone at the end of the test cycle. Test cycles can be programmed up to 99min, 59sec, and cycles can be interrupted or paused and restarted without affecting the total testing time.

Silent Testing Screen, 7-Tray Model
This model builds upon the features of the H-4227A, adding a sound-damping structure and an integrated digital LED timer. The door is equipped with an adjustable, heavy-duty over-center lever latch that ensures a tight seal against the frame. Strong ferrite magnets in the lid hold it securely open during loading and closed during operation to maintain seal integrity. Wear-resistant seals on both the door and lid further protect the laboratory environment by preventing the escape of dust and fine particles during testing.