A light detection device, comprising: a housing comprising a top surface and a bottom surface, wherein the housing extends along a housing axis between the top surface and the bottom surface, wherein the housing further comprises a handle portion disposed between the top surface and the bottom surface; a port formed in the top surface of the housing, wherein the port is adapted to receive a sample; and a door connected to the housing, the door comprising: an actuator portion adapted to selectively move the door between a closed position and an open position; and a cover portion integral with the actuator portion and adapted to close the port when the door is in the closed position and open the port when the door is in the open position to allow external access to the port; wherein the actuator portion is disposed adjacent the handle portion of the housing, such that the actuator portion is disposed closer to the handle portion than to either the top surface or the bottom surface of the housing and so as to allow a user to grasp the handle portion with a hand and, with the same hand, engage the actuator portion to selectively move the door between the closed position and the open position; wherein the light detection device is a luminometer, a photometer, a turbidimeter, a colorimeter or a fluorometer; wherein the light detection device further comprises a hinge, wherein the door is connected to the housing by the hinge and biased in the closed position, wherein the actuator portion is adapted to selectively move the door by rotating the door between the closed position and the open position and wherein the light detection device is configured and arranged such that when the user presses the actuator portion the door rotates from the closed position to the open position and the door returns to the closed position under the biasing of the door upon release of the actuator portion. a housing comprising a top surface and a bottom surface, wherein the housing extends along a housing axis between the top surface and the bottom surface, wherein the housing further comprises a handle portion disposed between the top surface and the bottom surface; a port formed in the top surface of the housing, wherein the port is adapted to receive a sample; and a door connected to the housing, the door comprising: an actuator portion adapted to selectively move the door between a closed position and an open position; and a cover portion integral with the actuator portion and adapted to close the port when the door is in the closed position and open the port when the door is in the an actuator portion adapted to selectively move the door between a closed position and an open position; and a cover portion integral with the actuator portion and adapted to close the port when the door is in the closed position and open the port when the door is in the open position to allow external access to the port; wherein the actuator portion is disposed adjacent the handle portion of the housing, such that the actuator portion is disposed closer to the handle portion than to either the top surface or the bottom surface of the housing and so as to allow a user to grasp the handle portion with a hand and, with the same hand, engage the actuator portion to selectively move the door between the closed position and the open position; wherein the light detection device is a luminometer, a photometer, a turbidimeter, a colorimeter or a fluorometer; wherein the light detection device further comprises a hinge, wherein the door is connected to the housing by the hinge and biased in the closed position, wherein the actuator portion is adapted to selectively move the door by rotating the door between the closed position and the open position and wherein the light detection device is configured and arranged such that when the user presses the actuator portion the door rotates from the closed position to the open position and the door returns to the closed position under the biasing of the door upon release of the actuator portion.