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HA5 Current Probe
HA100 Current Probe
HA1000 Current Probe
FX3000 Current Probe
eFX6000 Current Probe

Current Probe Selection Guide

Power Analyzer Selection Chart

Current Probes

Selecting the Right Current Probe

There are a few factors to consider when selecting a current probe. Please review the following:

Clamp-on probes work great if you have good access to conductors with sufficient clearance but they are rigid and may not be suitable for tight and confined spaces.  The flexible Rogowski probes are excellent for restricted situations where conductors are tightly bunched together, or for large bus bars.  The flexible design allows them to be snaked into panels and contorted to fit.

Unlike some other flexible probes PowerSight FX-series flexible probes do not need batteries –which can be problem if the battery dies half way through the monitoring session.  PowerSight FX probes are powered continuously from the meter.

Decide how much current you wish to measure and take into account maximum values for current surges such as when motors start. 

Knowing how many Current probes you want - See Bottom

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Knowing How Many Current Probes You Want

The number of current probes you want for a system is determined by what you intend to measure.


You want 4 probes if:
  • You are monitoring a 3 phase Wye or 4 wire delta system (3 phases plus neutral) and you wish to measure neutral current.
  • You are monitoring any 3 phase system and you want to have an extra current probe that can be used on one of the phases.  An extra probe is added insurance that you will have success.
  • You are monitoring 4 parallel single phase loads (neutral current probe is used for the 4th load)
  • You want to measure 4 DC branch loads (i.e. sharing the same voltage source) simultaneously.
You want 3 probes if:
  • You are measuring the power of a 3 phase delta and don’t want to have an extra probe available, just in case.
  • You are monitoring a split-phase power system (e.g. 120/240V) and want to measure neutral for leakage or attached single phase loads
  • You are measuring 3 phase Wye or 4 wire delta and want a different type of probe for measuring the neutral (e.g. a lower capacity probe for measuring imbalance or leakage)
  • You are measuring power of 3 parallel single phase loads
  • You want to measure 3 DC branch loads (i.e. sharing the same voltage source) simultaneously.
You want 2 probes if:
  • You are measuring the power of a split-phase circuit (e.g. 120/240V)
  • You are employing "2 current power mode" to measure total power of a 3 phase load
  • You are monitoring a high power load via 2 installed CTs (Current Transformers).
  • You want to measure 2 DC branch loads (i.e. sharing the same voltage source) simultaneously
You want 1 probe if:
  • You are measuring a single phase load
  • You wish to use a special probe for neutral imbalance or ground leakage current
  • You believe all phases are balanced and you want a rough measurement of power.
  • You want to measure a DC load.


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Last modified: Measurement & Control Solutions
Last modified: January 15, 2018