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Turn equipment on/off at any temperature Controller turns any piece of equipment on or off when temperature rises above high set point or falls below low-set point. Wide setting range of –4 to 140°F and –20 to 60°C permits maintaining temperatures above or below ambient. Control heating elements, cooling blocks, hot plates, heating mantles, cooling systems, or incubators to ±1°C. Controller may be set in 1° increments. Display reads in °F and °C with a 0.1° resolution. Unit accepts standard, three-pronged plug and controls equipment rated to 1800 watts, 15 amps. Brilliant, 1/2-inch-high LCD shows the temperature and time-of-day to the exact second. Red LED status light indicates on/off mode of attached equipment. Uses the same microchip and software that control sophisticated plant operations. May also be programmed to turn equipment on and off at any minute of any day. Always-remember memory permits programming three different pairs of on/off time switchings per day. Memory chip and display are powered by two AAA batteries. Settings are maintained for 1 year in the event of electrical outage. Learn to operate in seconds Simple commands are a joy to use. Display walks you through steps. Set high and low temperatures or schedule timer on/off settings in just seconds with press of a few buttons. Manual override permits equipment to be switched on or off instantly without disturbing temperature or timer settings. Traceable to NIST for accuracy To assure accuracy an individually serial-numbered Traceable® Certificate is provided from our ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability for temperature only to standards provided by NIST (National Institute of Standards and Technology). Both controller and relay are 2-3/4 x 5-1/2 x 1-1/4 inches and weight is 1 pound. May be used with equipment to 115 VAC, 1800 watts, 15 amps. Temperature sensor cable is 3-1/2 feet in length. Unit is supplied with batteries and a Traceable® Certificate. Replacement battery Cat. No. 1105.