A chemical indicator device comprising: a body; a shield, the shield removably attachable to the body and the shield comprising an aperture; a circuit board; a plurality of heat blocks operatively coupled to the circuit board; a housing comprising: an opening; a means to provide illumination; and, a plurality of wells, each well of the plurality of wells configured to receive a test tube of a plurality of test tubes, wherein the housing and the plurality of wells provide a structure to maintain the plurality of test tubes in a proper position to be viewed through the aperture and the opening, wherein the aperture, the opening, the means to provide illumination and the structure are configured such that when a plurality of test tubes are placed in the device, the plurality of test tubes are viewable from an angle that is more or less perpendicular relative to the direction of the illumination; and wherein the plurality of wells are configured such that during use, a first side of a first test tube disposed in a first well of the plurality of wells is in proximity of a first heat block of the plurality of heat blocks and a second side of the first test tube is in proximity of a second heat block of the plurality of heat blocks, and a first side of a second test tube disposed in a second well of the plurality of wells is in proximity of the second heat block and a second side of the second test tube is in proximity of a third heat block of the plurality of heat blocks, the circuit board configured for, during use, heating the first heat block to a first temperature, the second heat block to a second temperature and the third heat block to a third temperature, the first temperature different than the second temperature and the second temperature different than the third temperature, such that a temperature differential to be formed between the first heat block and the second heat block is sufficient to create a convection current within a sample disposed in the first test tube and a temperature differential to be formed between the second heat block and the third heat block is sufficient to create a convention current within a sample disposed in the second test tube. a body; a shield, the shield removably attachable to the body and the shield comprising an aperture; a circuit board; a plurality of heat blocks operatively coupled to the circuit board; a housing comprising: an opening; a means to provide illumination; and, a plurality of wells, each well of the plurality of wells configured to receive a test tube of a plurality of test tubes, wherein the housing and the plurality of wells provide a structure to maintain the plurality of test tubes in a proper position to be viewed through the aperture and the opening, wherein the aperture, the opening, the means to provide illumination and the structure are configured such that when a plurality of test tubes are placed in the device, the plurality of test tubes are viewable from an angle that is more or less perpendicular relative to the direction of the illumination; and wherein the plurality of wells are configured such that during use, a first side of a first test tube disposed in a first well of the plurality of wells is in proximity of a first heat block of the plurality of heat blocks and a second side of the first test tube is in proximity of a second heat block of the plurality of heat blocks, and a first side of a second test tube disposed in a second well of the plurality of wells is in proximity of the second heat block and a second side of the second test tube is in proximity of a third heat block of the plurality of heat blocks, an opening; a means to provide illumination; and, a plurality of wells, each well of the plurality of wells configured to receive a test tube of a plurality of test tubes, wherein the housing and the plurality of wells provide a structure to maintain the plurality of test tubes in a proper position to be viewed through the aperture and the opening, wherein the aperture, the opening, the means to provide illumination and the structure are configured such that when a plurality of test tubes are placed in the device, the plurality of test tubes are viewable from an angle that is more or less perpendicular relative to the direction of the illumination; and wherein the plurality of wells are configured such that during use, a first side of a first test tube disposed in a first well of the plurality of wells is in proximity of a first heat block of the plurality of heat blocks and a second side of the first test tube is in proximity of a second heat block of the plurality of heat blocks, and a first side of a second test tube disposed in a second well of the plurality of wells is in proximity of the second heat block and a second side of the second test tube is in proximity of a third heat block of the plurality of heat blocks, the circuit board configured for, during use, heating the first heat block to a first temperature, the second heat block to a second temperature and the third heat block to a third temperature, the first temperature different than the second temperature and the second temperature different than the third temperature, such that a temperature differential to be formed between the first heat block and the second heat block is sufficient to create a convection current within a sample disposed in the first test tube and a temperature differential to be formed between the second heat block and the third heat block is sufficient to create a convention current within a sample disposed in the second test tube.