It is true statement that the performance of any analyzer is no better than the sample that is delivered to it. Behind every successful analyzer installation is a good sample system. And the start of that sample system is the probe that ensures the fluid is sampled from the middle third of the line. The Welker SP-2 (standard) and PP-2 (pilot) probes have been meeting this requirement for years and used by a wide array of process industries including natural gas and petrochemicals. With their integral shutoff valve and all stainless steel construction, the SP-2 and PP-2 have given long, reliable use to their users.