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Electrostatic Voltmeter "Trek" Model 520

Model 520 Series

Hand-Held Electrostatic Voltmeters


*     Accurately measures surface voltage at a wide range of spacings

*     No need to maintain a fixed spacing

*     Inspect small spots for charge accumulation

*     Measure charge accumulation in difficult-to-reach locations

*     Chopper stabilized for drift-free operation in ionized environments

Low cost


Model 520

Over a spacing range of 5 mm to 25 mm, the 520 voltmeter provides better than a 5% voltage

measurement accuracy, while the typical fieldmeter provides a voltage measurement error

in excess of 50%. An optional voltage monitor output is available.


General Specifications

All Model 520 specifications are with a probe-to-surface separation of 15 mm, +/-10 mm.

All Model 523 specifications are with a probe-to-surface separation of 45 mm, +/-15 mm.



Model 520

Model 523

Measurement Range

0 to +/-2 kV DC.

0 to +/-20 kV DC.


Better than +/-5% of full scale over the entire recommended probe-to-surface separation range of 5 mm to 25mm.

Better than +/-5% of full scale over the entire recommended probe-to-surface separation range of 30 mm to 60 mm.


31 mm H x 59 mm W x 173 mm D

(1.2” H x 2.3” W x 6.8” D).

31 mm H x 59 mm W x 183 mm D

(1.2” H x 2.3” W x  7.2” D).


200 g (7 oz), with battery

200 g (7 oz), with battery

Power On/Off

A push-button switch                               


Drift with Time

Drift with Temperature


Less than 600 ppm/hour, noncumulative

Less than 600 ppm/°C

Operating Time

8 hours with a new battery


A push-button switch that, when pressed, commands the voltage display to hold the value displayed until the switch is released.

Voltage Display

3 ½ digit liquid crystal display.



0 to +/-1999 V

0 to +/-19.99 kV


1 V

10 V

Sampling Rate

2.5 readings per second

Zero Offset

Less than +/-4 counts

Power Requirements

One (1) 9-volt NEDA 1604 battery,

IEC 6R61 battery, or equivalent

Ground Receptacle

Snap-on connector

Operating Conditions


Relative Humidity


15°C to 35°C

To 85%, noncondensing


This product was added to our catalog on Monday 25 August, 2008.
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Nanomachinery Co., Ltd.
4, Soi Petchkasem 100 ,Phetchkasem Rd. ,Bangkaenue ,Bangkae ,Bangkok, 10160, THAILAND.
Tel : 086-322-6876 ,02-421-9927 ,Fax : 02-809-2591 E-mail : pongthorn@nano-machinery.com
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