Help Students Determine The Electrical Equivilant of Heat With This Versatile Double-Walled Calorimeter Can Be Used With Or Without The Electric Heating Element. When Connected To A 6-Volt Battery, By The Standard Binding Posts, The Mounted Heating Coil Will Cause A Temperature Rise of About 5C in 10 Minutes. The 1.7-cm Thick Styrofoam Lining, Plastic insulator Ring, and Aluminum Heat Reservoir Are Designed To Control Heat Loss. Reservoir Has 150ml Capacity and Has A Built-in Thermometer Cork. Size: 4″ Diameter X 4″ High (105X100mm). Comes With A Teacher’S Guide.