Defentect [SLNH] says it has added the Photovac, Inc.-made CT2020ComboPRO photoionization detector to its DM3 multi-threat monitoring and messaging system. The 2020ComboPRO is a handheld detector that measures volatile organic chemicals in air, including solvents such as toluene, gasoline and jet fuel, as well as acetone, which can be used in the manufacture of improvised explosive devices.