Sensor unit

A sensor unit comprising:

• a housing;
• a detecting unit configured to detect a physical quantity;
• a dot-matrix display unit provided on the housing configured to display the physical quantity detected by the detecting unit;
• an output unit configured to output a comparison result of the physical quantity detected by the detecting unit and a threshold;
• an operation unit provided on the housing and configured to receive a user input for adjustment operation for the threshold, setting operation of the sensor unit or operation mode, or any combination thereof;
• and
• a control unit configured to control the dot-matrix display unit, wherein
• the control unit is configured to cause the dot-matrix display unit to display the threshold and the physical quantity in a first display form and cause the dot-matrix display unit to display, together with the physical quantity and the threshold, information representing an operation mode of the sensor unit and different from the physical quantity and different from the threshold in a second display form,
• an area of a display region for one of the threshold and the physical quantity in the second display form is smaller than an area of the display region for the one of the threshold and the physical quantity in the first display form, and an area of a display region for the information in the second display form is obtained by reducing the area of the one display region for the threshold and the physical quantity, and
• the control unit is configured to cause the dot-matrix display unit to switch from the first display form to the second display form upon receiving the user input when the first display form is displayed on the dot-matrix display unit and switch from the second display form back to the first display form without receiving the user input after a predetermined time elapses when the second display form is displayed on the dot-matrix display unit.