In vacuum applications, a cold trap is a device that condenses all vapors except the permanent gases into a liquid or solid. Harvest Pro? Terp Traps can significantly reduce the wear and tear on vacuum pumps. They will trap and collect plant terpenes that are lost during the vacuum process. Harvest Pro? Terp Traps are currently available in a - 20ø C to -40ø or -80ø C (-4ø to -40ø or -112ø F) models and are equipped with stainless steel cooling coils and coolant drain outlet. Liquid coolant sold separately.