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Safe, Easy,
Voltage Measurement
How is voltage measured without any metallic contact?
Measure in potentially hazardous locations
Voltage Sensor
PW9020
Voltage generator
Micro current = 0
Voltage generator
Internal image
100V
PW3365-20
Schematic diagram
Principles of operation
Wire cross-section
Electrode
Electrode
100V
Measured voltage
Generated voltage
Voltages
balance
Freely clip either
horizontally or vertically
Free yourself from the risk of short-circuits by measuring right on the cable sheath without
ever needing to touch metal to energized parts
Measure both thick and thin cables
The PW3365-20’s dedicated voltage sensor
delivers the world’s first no-metal-contact measurement.
Locations without
energized parts
Measure on the
outside of cables
Inside the PW9020 is an electrode (a metal plate). When there is a potential difference between this electrode and the
measured line, a minute current flows as a result. By detecting this minute current and generating a voltage such that
the current declines to zero, it is possible to accurately measure the voltage without being affected by the outer diameter
of the measured cable or its insulation.
Measure without
removing the covers
Measure at safer points
Locations with
covered terminals
Locations with a risk
of electric shock
