Is probe normally open or a normally closed switch

[zeke]

Does anyone know if the probe is;

1) Normally open or a normally closed switch?
2) Does it require external power to operate?

Best Regards,
Zeke

[Old Salt]

probe gets its power from the carvewright with pluged in .

no switch that I know of.

[brdad]

The probe is a simple mechanical SPST normally closed switch. When nothing is touching the tip, the switch has continuity and it breaks when the tip is pushed up or sideways. It does not use any power, it only makes or breaks the circuit.