Immersion wells and compression fittings are available to fit a 1/2-14 or 3/4-14 NPT tapping with a range of insulation depths|Immersion wells and compression fittings are available in a variety of lengths and dia|Immersion wells and compression fittings are available in a variety of materials, to suit the application|Materials include - brass, copper, stainless steel, mild steel or monel|Element holders support the capillary and bulb or an averaging element in duct applications|Bulb shields protect the sensing bulb from sun and weather with the bulb installed outdoors|Accessories, including mounting clips, heat conductive compounds, waste nuts, a pipe strap and a well adapter are available for mounting sensing bulbs in various applications|Immersion wells allow heat transfer while protecting the sensing bulb from contact with the controlled medium|Immersion wells permit removal of the sensing bulb for testing or replacement without draining the system|Compression fittings seal the boiler and allow bulb insertion directly into the controlled medium|3 in L insertion, 3/8 in shell, 3 in D insulation and 5/64 in dia capillary