A sensor and sensor mount assembly are described. The sensor may include a sensor body, window, and frame. When the sensor is mounted to a seed delivery system, an alignment tab or recess on the sensor or the delivery system may mate with an alignment recess or tab included on the other of the sensor and the delivery system. The sensor frame may include a side flange proximate the sensor window, which may seat in a recess on the delivery system when the sensor is mounted to the delivery system. A mounting tab or groove on one of the sensor or the delivery system may be oriented at an oblique angle with respect to a seed path, and may seat in an obliquely angled mounting groove or tab included on the other of the sensor or the delivery system, in order to mount the sensor to the delivery system.
