C-clamps with integral bubble levels
Caddy for level vial
Calibration and compensation of an electronic compass system
Calibration apparatus for automatic magnetic compass correction
Calibration correction method for magnetic survey tools
Calibration of a meridian seeking instrument
Camber aligning tool
Cant angle sensor assembly
Cant angle sensor assembly
Cant angle sensor assembly
Cantilever-type inclinometer
Capacitive angle sensor employing a vertical cantilever beam
Capacitive balance leveling device
Capacitive based gravity sensor
Capacitive gravity sensor
Capacitive gravity sensor and inclinometer
Car door mirror equipped with bearing magnetometer
Car seat level indicator
Carpenter's level
Carpenter's square