The A421 Digital Electronic Temperature Controller replaces the discontinued A419 model, it is a single stage, electronic temperature controller with a single-pole, double-throw (SPDT) output relay, designed for homebrewers of beer and wine. It features an adjustable backlit LCD for viewing the temperature and status of other functions and a three-button touchpad for setup and adjustment. An LED indicates the On/Off status of the output relay.
The A421 control is 120 VAC. The A421 controls provide heating or cooling control, sensor offset, temperature setback, adjustable anti-short cycle delay and a restricted user adjustment mode. The temperature units can be displayed in °F or °C. The temperature adjustment range is -40 to 212°F or -40 to 100°C. The A421 automatically changes from heating and cooling.
The A421 controls are available in Type 1/IP20 high-impact plastic enclosures suitable for surface or DIN rail mounting and Type 4X/IP66 watertight, corrosion-resistant surface mount enclosures.
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