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TThe Levelstate Type 503 Water Column from HMA INSTRUMENTATION is a high-pressure water column manufactured from ASTM A105 carbon steel extrusion. The rating is 207 bar @ 370°C, and pressure-tested to 310 bar @ ambient temperature. The probe seats are machined into the thick wall of the extrusion at custom spacing as determined by the customer. Probes are secured by means of a clamp plate held in place by four M10 studs and nuts. Probes are sealed by way of a Metaflex gasket. The minimum probe spacing is 35mm.