What is the maximum length of the cable attaching the sensor and monitor or controller?

The maximum cable length forĀ attaching the sensor to a monitor or controller is 36 inches from the crystal itself (not from flange; see diagram).

Cable Length Sensor head oscillator
An external oscillator can be used to extend this length up to 60 feet. However, the length of cable between the crystal of the sensor head and oscillator must be 36 inches or fewer.