Magnetic Pointer Rail Thermometer Magnetic Pointer Rail Thermometer is used to measure the temperature of rail. rail thermometer is not only dedicated to measure the temperature of the railway rails, but also can measure the air temperature and the surface temperature of other objects. Model:JGGW-II Type:Rail Temperature Thermometer Material:Plastic Dimensions (L x W x H) (mm):10*8*3cm Temperature measuring range:-40~+70â?? Division value:1.0 â?? Accuracy level:1.0 â??