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This part of IEC 61010 specifies safety requirements for hand-held and hand-manipulated current sensors described below.

These current sensors are for measuring, detecting or injecting current, or indicating current waveforms on circuits without physically opening the current path of the circuit being measured. They can be stand-alone current sensors or accessories to other equipment or parts of combined equipment (see Figure 101). These include measurement circuits which are part of electrical test and measurement equipment, laboratory equipment, or process control equipment. These current sensors and circuits need additional protective means between the current sensor, the circuit and an operator.

Current sensors are hand-manipulated before and/or after a test or measurement, but do not necessarily need to be hand-held during the test or measurement. Current sensors used as fixed equipment are not within the scope of this document.

The following types of current sensors are covered:

All current sensors can also be used with insulated conductors. In this case, hazards are limited to acceptable levels by the insulation of the conductors.

Additional requirements for clamp multimeters are given in Annex EE.

Figure 101 shows graphical representations of typical current sensors for illustration purposes. Current sensors can look different depending on the design.