Long rod platinum resistance thermometer calibrating device

The utility model discloses a long rod platinum resistance thermometer calibrating device, including maring testing arrangement, first constant temperature bath device and second constant temperature bath device and thermoscope, it includes a both ends confined test section of thick bamboo, sets gradually at test section of thick bamboo outlying thermostat layer and heat preservation from inside to outside to mark testing arrangement, be equipped with first constant temperature medium inlet and the export of first constant temperature medium on the test section of thick bamboo, first constant temperature medium inlet and the first constant temperature bath device of first constant temperature medium exit linkage form first constant temperature media rotation return circuit, be equipped with second constant temperature medium inlet and the export of second constant temperature medium on the thermostat layer, second constant temperature medium inlet and second constant temperature medium exit linkage second con