The Chemisens CPA201 20 Bar Reactor is a cylindrical, double-walled glass vessel, closed at both ends with stainless steel parts. The reactor base includes the heat flow sensor, the Peltier element, and an outer metal enclosure. Ports are provided in both the lid and the base for auxiliary probes, dosing lines, pressure transducers, pH, gas flow etc. All fittings in the lid are compatible with the Swagelok system. During operation, the reactor is positioned in a fixed position in the Chemisens bench unit.