Trek’s new Electrostatic Voltage Sensor, Model 875, is designed for in-line monitoring of electrostatic charge build-up, which if left unchecked would disrupt manufacturing processes and/or cause product degradation and early life failure of semiconductors and other charge-sensitive components. Used to monitor static charge levels within manufacturing equipment such as conveyors, handlers, and other tools.
Trek’s Model 875 features an automatic calibration technique to maintain high accuracy and speed over wide variations of the spacing between the non-contacting measurement probe and the surface under test.
Other features include a voltage measurement range of ± 500 V DC or peak AC, accuracy of ±0.5%, speed of 25 ms, and low noise of 1% rms of full scale. Buffered output voltage and current monitors (4 to 20mA) are provided for remote monitoring and alarm purposes.
The unit is powered by +24 V DC and is housed in a standard DIN package to enable standardized mounting.
At 4 mm ±1 mm probe-to-surface distance
Current Monitor (4-20 mA)
Speed of Response (10% to 90%)
Aperture Orientation / Body Type
Probe Cable Length
Recommended Probe-to-Surface Separation
An optional probe holder fixture is available - contact factory.
Voltage Monitor Output
Current Monitor Output (4-20 mA)
Fault Warning Output
Power ON Indicator
An optional probe holder fixture is available - contact factory for additional information.
Power Supply Voltage
Power ON Indicator
TREK, INC. certifies that each Model 875 is tested and calibrated to specifications using measurement equipment traceable to the National Institute of Standards and Technology or traceable to consensus standards.
Caution: These instruments are designed to make electrostatic voltage measurements only. Do not use these instruments to make measurements of “hard” voltage sources or voltage sources which can deliver currents high enough to cause harmful shocks or personal injury.
All specifications are subject to change.