These Classic Kjeldahl Digestion Apparatus provide macro digestion for nitrogen determination of samples up to five grams. Six-Place Models are able to digest up to six samples at one time. Two-Place Models are able to digest up to two samples at one time. The Two-Place unit offers the same rugged construction as larger Kjeldahl models, plus it is compact and may be placed inside a fume hood. Choose units with Water Ejector Systems for fume removal. A 3/4" water inlet draws water through the aspirator and fumes are exhausted through the bottom of the aspirator. A 3" drain line and 60 psi water pressure is required for operation. Models with Blowers include a left-side mounted 1/3 hp blower exhaust system for fume removal. Blower exhaust connection is sized for use with 6" nominal (6-5/8" OD) vent duct. Frame is constructed of epoxy-coated steel. Includes 6" PVC pipe and flexible coupling with clamps. Features: 600-watt heaters with individual infinite-control knobs with variable input from 20-100% capacity and a CPVC fume manifold fitted with Teflon nipples. Requires 500 or 800 ml Kjeldahl flasks (not included).