Marshall 3" Dial asphalt kettle thermometers with 50-650F temperature range are used to measure the temperature of asphalt in paving and roofing applications. Temperature monitoring is critical for proper application of paving and roofing materials. The asphalt storage temperature must be closely controlled in order to maintain the correct viscosity for spraying or applying. Marshall asphalt thermometers are used for testing hot asphalt product and for monitoring temperature on kettles and trucks.