Selling used a chemical oxygen demand analyzer made by Precision Scientific Co. Catalog# 68900t9800. model = Aquarator. this unit comes with some glass ware and tubing. this is a heavy piece of equipment containing a MSA model 300 amplifier,constant differential flow controller by MOORE P roducts Co., and an oven with associated electronics and sensors.Unit appears to be in fair overall condition although the oven will require attention. power requirements are 115 volts ac @1750 watts. there is a wooden shipping crate for this unit and shipping arrangements will have to be made by buyer while unit can be picked up in piscataway nj.