We have experienced several issues in the past where Cyclops sensitivity is reduced or Cyclops will stop detecting all together.
Continuously Powered Cyclops
Over time the Cyclops sensitivity can be reduced if the power is not being cycled. This is typical in RTU/PLC based systems where the power is applied continuously and not removed during the Close/Fall portion of the cycle.
ETC released firmware version 4.0.1 which automatically refreshes the sensitivity of the magnetic sensor periodically.
Using magnetic plunger retrieval tools can cause the lubricator to become magnetized. This strong magnetic field biases the Cyclops reading to the point where the sensor is at the maximum reading and cannot see a change when the plunger arrives.
ETC released firmware version 5.0.1 which automatically detects that the sensor is near its maximum reading and automatically adjusts the sensitivity down to allow enough head room to detect an incoming plunger.
You can manually remove the magnetic field from the lubricator by rubbing a strong magnet along the outside of the lubricator in the upward direction.