TSI 3068B Aerosol Electrometer

Description of TSI 3068B

TSI’s Aerosol Electrometer 3068B provides accurate measurements of the total net charge on aerosol particles with a sensitivity of better than ±1 femto Ampere (fA) RMS with a one-second averaging time. It is used for the calibration of submicrometer particle detection devices in reference institutes around the world. Compared to other electrometers, it has a huge dynamic range with no range-switching necessary. It also includes temperature stabilization circuitry that allows it to have very low temperature drift over its operational temperature range.

Features and Benefits

• Provides readings in real time
• High sensitivity: ±1 fA
• Wide dynamic range with no range settings (±12,500 fA)
• Temperature stabilized to significantly reduce drift
• Automatic flow control (0.3 to 10 L/min) when used with external vacuum source
• Fundamental particle concentration measurement when used with a TSI® Electrostatic Classifier
• Wide particle size range (0.002 to 5.0 μm)

Applications

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

Technical specifications of TSI 3068B

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 (±3%); 2.0 to 10 L/min (±5%)

Particle Size Range

• 0.002 to 5 μm

Particle Type

• Solids and nonvolatile liquids

Dimensions (H x W x D)

• 19.6 × 21.3 × 30.4 cm (7.7 × 8.4 × 12 in.)

Weight

• 4.5 kg (9.9 lb.)

Power Requirement

• 50 to 60 Hz, 100/120/230/240 VAC, 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

Communications

• RS-232 and USB