Provides macro digestion for nitrogen determination of one or two samples up to five grams. Unit is portable and can be placed on any bench top. Requires connection to a water aspirator pump for operation. Inlet and outlet water connections are 3/8" NPT. Frame is constructed of epoxy-coated steel. Features: two 600-watt heaters with two individual infinite-control knobs with variable input from 20-100% capacity and CPVC fume manifold fitted with two Teflon nipples. Requires 500 or 800 ml Kjeldahl flasks (not included).