McDonnell & Miller P-5-SS Probe Rod

The McDonnell & Miller P-5-SS Probe Rod (Part Number 179550) is a critical 60-inch sensing component engineered for high-demand low water cut-off and liquid level control systems. Constructed from 316 stainless steel, this probe provides superior corrosion resistance in harsh boiler environments and industrial fluid applications. As a direct replacement for the legacy G-5-SS model, the "P" designation indicates a specialized PTFE coating (Teflon), which prevents false signals caused by scale build-up or tracking across the insulator—a common point of failure for contractors servicing high-pressure steam systems.

Designed for seamless integration with RS series sensors and compatible with PCH, PCL, and LPC-2000 series controls, this rigid 5-foot rod maintains electrical integrity even under fluctuating thermal loads. The PTFE insulation ensures that the conductive path remains isolated to the intended sensing tip, providing precise conductance level sensing. When replacing an existing 179550 probe rod, verify that internal clearances meet the standard 1/4-inch minimum from metal surfaces to ensure reliable switching performance and system safety.

• 316 Stainless Steel Construction: Offers maximum durability against oxidation and chemical pitting in treated boiler water.
• Anti-Fouling PTFE Coating: The Teflon-coated surface inhibits mineral accumulation, reducing maintenance intervals and nuisance tripping.
• Direct G-5-SS Replacement: Specifically engineered to upgrade McDonnell & Miller legacy installations with modern insulation technology.
• Versatile 60-Inch Length: Can be cut to specific field requirements for custom tank depths or precise low water cut-off levels.

Is the P-5-SS compatible with older G-5-SS sensors?
Yes, the P-5-SS is the direct performance upgrade for the G-5-SS. The primary difference is the addition of the PTFE coating for better signal reliability.

Can this 60-inch probe be used in high-pressure steam applications?
This rod is designed for use within the pressure ratings of the RS series sensors they attach to, typically meeting standard commercial boiler specifications.

What causes a probe rod to send false "water present" signals?
False signals often occur when "bridging" happens due to scale or moisture on the insulator. The PTFE coating on this stainless steel probe is specifically designed to eliminate this issue.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.