Electronic Temperature Control - A421abc-02c Organic Given that beneficial microbes contribute

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Electronic Temperature Control - A421abc-02c Organic Given that beneficial microbes contributeDirect Replacement To The A419abc 1C The A421 Series Electronic Temperature Controls Are Single Stage Controls With A Single Pole, Double Throw (Spdt) Output Relay. A421 Controls Feature A Bright Backlit Lcd With Adjustable Brightness And A Three Button Touchpad Interface That Can Be Set Up To Restrict User Adjustments. An Led Indicates The Output Relay's On Off Status. Standard A421 Series Control Modules Have Simple On And Off Temperature Settings