The Pro-Leaf TEMP-B1, digital Day/Night temperature controller, allows simple control of a 240-volt heating or cooling device. Adjustable set points allow a precise temperature control range from 5-50 degrees centigrade and adjustable deadband setting. A remote sensor on 4.5m cable accurately measures the garden temperature, which is displayed on the digital display in real-time. An integrated photocell allows separate day and night settings. The TEMP-B1 stores maximum and minimum values for later retrieval.