The Kele WEL-B and WEL-S Sensor Wells are used with standard length Kele and Precon branded immersion thermistor and RTD sensors. These wells may be used with 5in (12.7 cm) Minco immersion sensors by using the 'H' option adapter. The well is designed to be installed into a standard 1/2in saddle or Thredolet® The WEL-B Brass Thermowell is the standard thermowell for inserting into noncorrosive liquid lines. It will withstand a maximum temperature of 400 degrees F (204 degrees C) and a maximum static pressure of 1000 psig (6.9 MPa).The WEL-S 304 Stainless Steel Thermowell is inserted into corrosive liquid pipe lines. It will withstand a maximum temperature of 1000 degrees F (538 degrees C) and a maximum static pressure of 4500 psig (31 MPa). The F2S-D Stainless Steel, F2N-D Nylon, or the F2B-D Brass Well Adapter allows a 1/4 in (0.64 cm) diameter sensor probe with a 1/2in NTSM fitting to be used with a standard WEL-B or WEL-S Thermowell. WARRANTY 1 year