Our standard RTD probe uses a 100 ohm platinum element with alpha = 0.00385. Sheath material is SS 304 and can be 1/16, 1/8, 3/16, or 1/4 inch diameter in standard length of five inches. Units are available with either a standard size plug or teflon insulated lead wire. When ordered with a plug; the plug has three prongs. Units with lead wire can be either two or three conductor. Available with stainless steel overbraid for added durability.