Ramp rectangular water bath has 6 holes, double walled construction, inner reservoir of stainless steel, outer body in mild steel with glass wool insulation in between, supplied with lid having one hole of 12.5cms dia and 6 holes of 7.5 cms dia. Concentric rings with lids are provided on holes. The top plate and concentric rings are of stainless steel temperature range ambient to 100° C, size of the chamber 30cm x 25cm x 12cm.