Trek's Charge-to-Mass Ratio System (Model 212HS) is a portable Q/m analyzer that utilizes the “draw-off” toner transfer method to provide repeatable, highly accurate toner/powder charge measurements.
Measurement Range：
0.000 to ±1.999 microcoulombs
(other ranges available as options)
Measurement Resolution：
0.001 mC (1 nC)
