This oven thermometer by Heston Blumenthal Precision helps maintain optimum oven temperature while cooking. The bold display is easy to read and the adjustable body is best for viewing at an angle. It hangs, stands or sits on the oven shelf. Its compact design and quality stainless steel body with glass lens make this piece a cooking essential. It features a temperature range of 50°C to 300°C. Heston Blumenthal Precision is a range of precision kitchen instruments designed by Heston Blumental and manufactured by Salter.