Multi-function sight port and method of installing a multi-function sight port

A method for retrofitting a sight port, comprising:

• removing an existing sight port door;
• installing a multi-function sight port door, the multi-function sight port door comprising:
• a sight port base;
• a sight port door coupled to the sight port base, the sight port door having a sensor mount attached at an aperture of the sight port door, the sensor mount configured to allow a sensor to monitor an interior of a heater;
• a mounting plate of the sensor mount having a sensor mounted thereto, the mounting plate being configured to allow for one or more of X-axis, Y-axis, Z-axis, tilt, roll, and yaw positioning of the sensor, the mounting plate being coupled to the sight port door via one or more of translation fasteners and orientation fasteners;
• mounting the mounting plate to the sight port door;
• monitoring the interior of the heater using the sensor mounted to the sensor mount;
• and
• adjusting the one or more of X-axis, Y-axis, Z-axis, tilt, roll, and yaw positioning of the sensor via the one or more of the translation fasteners and the orientation fasteners.