This Hellma TrayCell Cap has a small mirror that works with the TrayCell accessory (L7110289) to ensure a constant pathlength of 0.2 mm when measuring samples. These measurements are then adjusted by a factor of 50 to make them equivalent to measurements taken in a 1 cm cell.

This Hellma TrayCell Cap has a small mirror that works with the TrayCell accessory (L7110289) to ensure a constant pathlength of 2 mm when measuring samples. These measurements are then adjusted by a factor of 100 to make them equivalent to measurements taken in a 1 cm cell.