Electrostatic Products

Trek PD04002A

Versatile Microprocessor-based Charged Plate Monitor for Monitoring the Performance of Air Ionizers

Advanced Energy’s Trek PD04002A is a versatile, microprocessor-based charged plate monitor ideally suited to monitor the performance of air ionizers that are used in critical wide temperature operations.

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The ultra-sensitive Trek® PD04002A makes it the ideal choice in air ionizer monitor applications where small area ion collecting sensors are used to meet the requirement for high accuracy ion balance measurement to levels of less than one volt. The voltage of the charged plate is initialized before discharge time testing. Balance tests, positive discharge tests, and negative discharge tests can be initialized from a remote location through digital command signals. The charged plate voltage can be remotely monitored through a rear panel connection.

The Trek PD04002A utilizes a new technique that requires less than 0.1 picoampere of ion field current to achieve full accuracy and stability. Other product designs require up to 2000 times more ion current to be drawn from the ion field to achieve stability.


  • Remotely monitor the charged plate voltage using a rear panel connection
  • Use on a tabletop or securely mount the monitor and charge plate with fasteners at the bottom of the unit
  • Select from standard, custom, and wide temperature range charged plates
  • Opt for a high temperature charged plate 25 x 25 mm (1 x 1 in)


  • Exceptional accuracy and stability in a compact design
  • Voltage monitor output for remote monitoring
  • CE Compliant NIST-traceable Certificate of Calibration provided with each unit

Select specifications are shown below. Please see product data sheet for additional specifications.

  • Performance

    Charged Plate Voltage Range

    0 to ±55 V DC or peak AC, nominal

    Charged Plate Voltage Measurement Accuracy

    0.2% of full-scale

    Large Signal Bandwidth (-3 dB)

    DC to greater than 200 Hz

    Charged Plate Self-Discharge Rate (no incident ion flow)

    Less than 2 V per minute at 55 V for relative humidity up to 85%

  • Mechanical

    H x W x D

    43 x 122 x 153 mm ( 1.7 x 4.8 x 6 in)


    0.3 kg (0.6 lb)

  • Operating Conditions


    5 to 35°C

    Relative Humidity

    To 85%, non-condensing

Specifications are subject to change without notice. Not all options and accessories are available for all models and configurations. Dimensions listed generally refer to standard configurations and module bodies only. Please confirm technical specifications and customizations with a sales representative. Advanced Energy is not responsible for errors or omissions.

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Product Support

U.S.: +1 800 446 9167
Asia: +86 29 8874 1895
China: 400 8899 130
EMEA: +44 800 032 1546
U.K.: 08000 321 546

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