IEC 60335 standard 40mm Hemispherical End Test Probe

The stirrer shall incorporate a biased-off switch that is recessed or guarded to prevent accidental operation. It conforms to the IEC60335-2-14 requirement.

Appliance is checked by applying a cylindrical rod whose diameter is 40mm and which has a hemispherical end to touch the switch with a force not exceed 5N. The appliance shall not operated.