They are made in several types, all of which are ruggedly built to give continued, reliable field service.
Additional protection is provided by externally mounted rubber bumpers on all except No.
Towing Surface Bucket. All frames have insulated water wells of sufficient capacity to provide ample water around the thermometer bulb which minimizes temperature changes due to external radiation. Frame has the additional protection of a polished, plated, radiation shield surrounding the water well. The precision thermometers supplied are carefully fabricated by highly skilled master artisans, exceptionally qualified in the fabrication of such instruments. All are made with quick-responding, sensitive mercury bulbs and are ruggedly built to withstand rough handling at sea.