How To Clean A Sieve

SRH 4/200 sieve holder on drain tray/lid

Safely cleaning fine mesh sieves means quickly and thoroughly removing trapped particles without damaging or deforming the sieve mesh. Manual cleaning using brushes to dislodge particles has drawbacks that include potential damage to fine mesh and failure to achieve 100% particle removal. The problem is solved by combining the Elma SRH 4/200 rotating sieve holder with a 37 kHz 7.5 gallon Elmasonic E 300H or S 300H ultrasonic cleaner*, all available from Tovatech.

Clean Four Sieves Simultaneously

The electrically powered SRH 4/200 module holds up to 4, 200-mm (8 inch) lab sieves clamped in a slightly canted position and rotates them into and out of the ultrasonic cleaning solution. Ultrasonic cavitation produced by the E or S 300H generator-powered transducers creates billions of minute bubbles that implode vigorously against the screen mesh to quickly but safely dislodge trapped particles. Because the screens are canted particles fall to the bottom of the cleaning tank rather than remain in the sieve.

The rotation feature of the SRH 4/200 serves as a rinsing action contributing to thorough cleaning. At the end of the cleaning cycle the SRH 4/200 module with sieves is removed and placed on the inverted lid of the ultrasonic cleaner to drain. Screens should be examined to assure insoluble particles are not locked into the mesh. If so, the particles should be carefully dislodged using a brush.

Other Ultrasonic Cleaning Tasks

Available in several sizes, heater and timer-equipped Elma E and S series ultrasonic cleaners gain added utility for cleaning laboratory glassware and instruments, and depending on the model can perform other tasks.

The entry-level E series is a great choice for routine cleaning. It features permanent sweep to provide uniform distribution of ultrasonic power throughout the tank.

SRH 4/200 sieve holder and ultrasonic cleaner

The S series, with approximately 30% more power than the E series, can be operated in the

sweep mode for uniform distribution of sonic cleaning energy throughout the bath
normal or fixed frequency mode for processing lab samples
degas mode for degassing HPLC solvents and preparing fresh cleaning solutions
LED displays showing set and elapsed time, set and current temperature, and activated mode

Units are shipped with a lid that doubles as a drain and complete operating and maintenance instructions. Optional cleaning baskets and other accessories are available to extend the usefulness of these ultrasonic cleaners.

Contact the ultrasonic cleaning professionals at Tovatech for advice on equipment and cleaning solutions to match your requirements. We also invite you to download our guide to 10 critical factors in selecting ultrasonic cleaners.

*Two sieve holders will fit into an Elmasonic S 900H ultrasonic cleaner.