Core Technologies

PATENTED Direct Heat, Air™ (DHA) HEATING

The Direct Heat, Air™ (DHA) chamber heating system is an exclusive feature of the SANYO MCO-20AIC, MCO-18AIC, MCO-18M, MCO-5AC, MCO-17AC CO2 incubators. The patented Direct Heat (Air) Air Jacket Heating System eliminates the need for a conventional water jacket, while achieving temperature stability, uniformity and fast recovery following door openings.

• The microprocessor controller directs proportional distribution of electrical power to a series of independent heating sources in the incubator.
• Arranged in three zones, these sources include the side, top and rear walls, the chamber base and the outer door.
• Together, the heating sources maintain accurate temperature control over a range from 5°C above ambient to +50°C, with setpoint accuracy to 0.1°C and uniformity better than 0.25°C throughout the chamber.
• Each zone is controlled according to the demands of the microprocessor which manages continuous feedback from the incubator via a PID (proportional, integral and derivative) algorithm.

MCO-20AIC shown with five shelves, included.

Zone	Location	Energy	Microprocessor Control
Main	Side, top and rear walls	Variable	Energizes any, all or a combination of heating elements as required
Base	Floor	Variable
Front	Outer door	Variable

An air jacket with five independent heating elements arranged in three zones surrounds the interior chamber. The microprocessor control system apportions energy to heaters in response to chamber demand and ambient temperature.

• Side, top and real walls form the dominant radiant heat source.
• The base heater elevates the humidity reservoir water temperature to achieve 95% RH at 37°C
• The outer door heater warms the inner glass in response to ambient conditions to eliminate condensation on the glass and around the opening, and to assure interior uniformity.