A. R. Engineering Works offers Ice Plant Tutor with Stop Watch. A. R. Engineering Works also manufactures condensing unit, laboratory condensing unit, experimental condensing unit, motorized gyroscope, absorption refrigeration chiller, air conditioning [1 ton], air water heat pump, drop and film condensation apparatus etc. The Ice Plant Tutor with Stop Watch is used to determine the C.O.P. Of vapor compression refrigeration cycle. The Ice Plant Tutor with Stop Watch works on vapor compression refrigeration cycle.