Aerosol Electrometer

An electrically-isolated, high-efficiency filter collects the charged particles. Then, a highly sensitive electrometer measures the electrical current, I, draining from the filter.

The Aerosol Electrometer provides accurate measurements of electrical current and flow rate. It measures total net charge on aerosol particles from 0.002 to 5 µm.

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SKU: TSI 3068B Categories: , ,

When paired with a TSI Electrostatic Classifier, the Aerosol Electrometer measures the number concentration of monodisperse aerosol. This configuration is used primarily for calibrating and testing particle instruments like Condensation Particle Counters.

Data are presented on the front-panel display and output by RS-232 or USB in real time and also as an analogue voltage for data recording. A vacuum source is required.

Features and Benefits
• Provides readings in real time
• Increased sensitivity—±1 fA (two times better than Model 3068A)
• Wide dynamic range with no range settings(±12,500 fA)
• Temperature stabilised to significantly reduce drift
• Automatic flow control (0.3 to 10 L/min) when used with external vacuum source
• Reduced internal particle losses
• Modern communications with RS-232 and USB interface
• Membrane touch-panel with two-line, LCD alphanumeric display
• Digital displays of either current or concentration and flow rate
• Fundamental particle concentration measurement when used with a TSI Electrostatic Classifier
• Wide particle size range (0.002 to 5.0 µm)

Primary Measurement Particle total charge indicated by current
Displayed Values Particle current or calculated number concentration (based on user-specified charge/particle) and flow rate
Sensitivity ±1×10-15 A (±1 fA) RMS at 1 sec averaging time
Measurement Range ±12,500 fA
Step Response Time <2.5 sec
Temperature Drift <±2 fA in 24 hours over operational temperature range
Operational Temperature Range 5 to 35°C (ambient)
Storage Temperature Range -20 to 50°C
Operational Humidity Range 0 to 90% RH (ambient), non-condensing
Aerosol Sample Rate Automatic flow control from 0.3 to 10 L/min using external vacuum source; manual flow settings available for increased flow accuracy
Flow Accuracy 0.3 to 2 L/min (±2%); 2.0 to 10 L/min (±5%)

Particle Size Range 0.002 to 5 μm
Particle Type Solids and non-volatile liquids

Dimensions (HWD) 196×213×304 mm (7.7×8.4×12 in.)
Weight 4.5 kg (9.9 lb.)
Power requirement 50 to 60 Hz, 100/120/230/240 VAC at 0.1/0.1/0.05/0.05 A
Vacuum requirements Vacuum that can produce 10 L/min at a pressure drop of 114 cm of water (to produce full flow)

Front Panel Output Two-line LCD alphanumeric display, keypad
Software Aerosol Instrument Manager software supplied with instrument (RS-232 and USB-compatible)
Interface Membrane touch-panel

• Instrument calibrations such as Condensation Particle Counter calibration
• Particle concentration measurements
• Particle charge and charge ratio experiments
• Submicrometer filter-efficiency tests
• Certain types of submicrometer size-distribution measurements

Ordering Information:
3068B Aerosol Electrometer

Specify Description
3033 Vacuum Pump
3080 Electrostatic Classifier Platform
3081 Long Differential Mobility Analyser (DMA)


Weight 8 kg
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