The 20BTG-250-10-1/2 B-Series Temperature Murphygage is a 2" dial, diaphragm-actuated temperature-indicating gage with a temperature range of 130-250°F (54-121°C) and a 10 foot capillary length. The instrument is a high quality, diaphragm-actuated indicating gage. With the same heavy-duty design as the standard 20 series Swichgage instrument, the B-gage is more compact and is the optimum instrument for gage-only applications. B-Series gages have a high-impact polycarbonate lens, sturdy steel case, and a polished, low-profile stainless steel bezel.