Non-Contacting Electrostatic Voltmeter for EOS/ESD

  • Product No:541A Series
  • Manufacturer:Trek, Inc.

The Trek Model 541A Electrostatic Voltmeter (pictured at left with the Model 541PR-S probe) provides accurate non-contacting measurements of the electrostatic surface voltage associated with EOS/ESD processes. The instrument is configured with a miniature electrostatic field chopper probe that can be remotely located and easily positioned within process equipment to provide highly accurate, non-contacting, DC-stable, spacing-independent voltage measurements in either ionized or non-ionized environments. A 20x4 alphanumeric LCD screen displays the present measured voltage, the positive peak voltage, the negative peak voltage and additional menu information.

Chopper probe is DC-stable with or without incident air ion flow

Drift-free measurements

LCD screen displays present voltage and holds the most positive and negative values

Visual and audible alarms activate when the preset voltage threshold levels are reached

Voltage output monitor for remote monitoring or control

USB and RS-232 serial ports

NIST-traceable Certificate of Calibration provided with each unit

CE compliant

Optional Walking Test Adapter kits available


Model 541A-1

  • Measurement Range:

    Model 541A-1: ±1KV

    Model:541A-2: ±100V

  • Speed of Response (10%to 90%)

    Less than 50 ms for a ±1 kV step (541A-1)

    Less than 50 ms for a ±100 V step (541A-2)

  • Measurement distance:2.5mm±1mm

  • Accuracy:1% of full scale

  • Resolution:0.1%

  • Temperature 15°C to 35°C (59°F to 95°F)

  • Relative Humidity 5% to 85% RH, non-condensing

  • Altitude To 2000 m (6561.68 ft.)

  • Dimensions 97 mm H x 152 mm W x 204 mm D (3.8” H x 6” W x 8” D)

  • Weight 0.77 kg (1.7 lb.)