This safety rest is ESD safe.
Safety rests with Stop Go function with fibre optic sensor for soldering irons WSP 80, WP 80, WP 120
The Weller safety rests with Stop Go function are recommended acessories for FE irons using the WFE or WFE P extraction units. A fibre optic sensor switches the extraction unit on when the FE iron is removed from the safety rest and when the FE iron is replaced in the safety rest, after a short delay to gather the fumes from any solder on the tip it switches the unit off. This reduces running costs.