Photograph and cross sectional view of the NINA H.V6 prototype heater device. The reusable-housing platform is designed to heat micro PCR tubes using a commercial thermos with manufactured inserts. Five sample wells are surrounded by the phase change material (PCM) chamber and the exothermic reaction takes place below the PCM at the bottom of the stainless-steel insulated thermos. The PCM is used to buffer the exothermic reaction and provide a constant temperature to the sample wells. Disposable magnesium iron alloy (MgFe) and saline cartridges can be simply dropped into the housing to activate the device.