These are 1100°C, 1200°C & 1300°C Laboratory chamber furnaces (CWF) with the maximum temperatures of 1100°C, 1200°C & 1300°C respectively. It has the chamber capacity of 5, 13 or 23 litres accordingly. The chamber has a good thermal uniformity thanks to the free radiating coiled wire on both the sides of the chamber.The heater can heat up in less than half of what the usual slab designs offer. It also provides resistance to abrasion with a hard wearing refractory insulation inside the chamber. The frame is sturdy due to the hard ceramic hearth as the base. This can easily be replaced in case of spillage. It has a vertical counter balnced which keeps the hot door insulated by the operator.It has positive break door safety switch which seperates the chaber from the power supply when the door is opened. It has a double skin construction which allows air flow to cool the outer case and meet the EN61010 safety standard. It has a choice PID programming.