Second, our ProTemp filter material gives more consistent blanks because it is more resistant to fiber loss from moving water. No more negative blanks due to loss of fibers. Finally, the surface finish and fiber size is more uniform. There are virtually none of the larger glass particles (called shot in the industry) that can wash out during analysis, diminishing results.

We have also upgraded our filter cutting process. We now use a 75 watt CO2 laser that cuts perfect filters of any size with a focused laser beam instead of traditional cutting dies and presses. Take a look at our filters and note how uniform the outer edge is.

 This melt-cut edge maintains its integrity and resistance to fiber loss as each individual filter is washed repeatedly with DI water as the method requires. Functionally, this means that there is less damage to the filter surface and less loose fiber that can be lost in the process and affect the final weight.

Finally we have upgraded our robotic system and are now using dedicated weigh cells instead of standard analytical balances for all 42mm, 47mm and 55mm ProWeigh filters. These certified weigh cells are much faster, and stabilize much more quickly than the analytical balances.

They are so incredibly fast that we configure them for maximum stability possible before a weight is registered. Also, there is virtually no drift. ProWeighs have always easily met the requirement of being weight reproducible to 0.5mg. Now, the weights are even tighter and closer to the mean.

Improved filter material, improved preparation and more accurate weighing result in a better product that always meets the needs of your laboratory. Environmental Express is committed to constant improvement of our processes and products to improve your results and save you time.