In this type of baths, the heat, is transmited to the recipients through the sand that is in direct contact with the recipients. Sturdy metallic painted housing, and Stainless Steel internal tank. The heating element is not at sight, and it has a maximum area, to get the maximum uniformity temperature that reaches 370ºC in the sand. Electronic regulation temperature controlled by pulses, with input for electric contact thermometers: Standard, safety (3 wires) or electronic, according to DIN 12878.