Stainless Steel Storage Dishes - Many laboratories store filters in glass Petri dishes. While such a practice may seem convenient, it can actually have an adverse affect on weighing results. While PTFE is one of the most electronegative materials on the Triboelectric scale, glass is electropositive. The result is a transfer of electrons to the PTFE, causing electrostatic charge problems. MTL has developed a stainless steel storage dish for use in the laboratory to minimize such problems. The dishes have a slot cut into the side to allow for environmental equilibration and to enable a pair of tweezers to easily reach the filter. The dishes are cleanable and stackable, allowing a laboratory to use space more effectively.
Faraday Weighing Pan
Electrostatic charge is a large contributor to measurement uncertainty in filter weighing. PTFE filters are especially susceptible to this problem. MTL's Faraday Pan in tandem with Polonium eliminates the effect of electrostatic forces. A cage surrounds the weighing pan to create an environment where electrostatic charge is nullified and cannot bias readings. It is compatible with Mettler Toledo TM and Sartorius TM equipment and can be used with or without MTL's AH225.
MTL's Faraday pan is made out of brass and dipped in gold to prevent tarnishing. It sits inside the balance and provides a flat surface on which to weigh filters and calibration weights. It prevents electrostatic charges from pushing down on the filter and causing the balance to read it as heavier than it actually is.
