Charge-to-Mass Ratio Test System

  • Product No:212HS
  • Manufacturer:QUATEK

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. Due to its small size and weight, the instrument is highly portable, making it an excellent choice for use directly on the production line or in the laboratory. The Model 212HS system employs a unique specimen separation and transfer technique that avoids the creation of measurement errors due to the undesired additional charging of test specimens sometimes caused by the rapid air movement associated with "blow-off" type measurement systems. The unit is configured as a separate main indicator unit, a plug-in sample cell unit, and a plug-in absorption nozzle unit to allow for different configurations in response to various user applications. A two position switch selects pump strength for normal or high application needs, such as for measuring charge on single component toners (when stronger suction is required).

All measurement data is displayed on a front panel read-out and is available as analog voltage data on output 1 (absorption nozzle data) and output 2 (sample cell data) rear panel BNC connectors. Data can be temporarily stored to on-board system memory with the push of a button.

Product Features

· Inhalation nozzle design avoids measurement errors associated with traditional "blow-out" measurement techniques

· Accurately determines the charge-to-mass ratio characteristics of single-component and two-component toners or other powders

· With the measurement data storage function, data can be stored to the PC through the USB interface

· Built-in air pump for easy customer use

· One-click switch for adjusting the suction power of the air pump, convenient for operation


0.000 to ±1.999 microcoulombs.

(other ranges available as options)

Measurement Resolution


Accuracy Monitor Output

Better than 0.2% of full scale.

DPM Display Output

±0.25% of full scale.

Test capacitance


Input impedance

Better than 1000Mohm

Output interface

Analog voltage *2; USB



22.0cm W*28.0cm H*28.0cm D


8.0 kg

Suction regulation


Vacuum Pressure

10 kPa.

Normal Absorption (Nozzle Unit)

50 Hz: 6.0 to 6.5L / minute

60 Hz: 6.0L/ minute

Maximum Absorption (Nozzle Unit)

50Hz: 11.6L/ minute

60 Hz: 10.6L/ minute