NTI 83035 Thermister, 1/4 in. NPT (All M100(V) models sold in US) M100, M100V, (All ASME stamped Ti100-150 models) Ti100, Ti150, (All Ti200 models manufactured after 2/1/2008) Ti200, (All Ti400 models) Ti400, (All M100(V) & Ti100-150 models manufactured after 3/20/2008) M100, M100V, Ti100, Ti150