McDonnell & Miller RS-5-BR-1 Holder

For high-pressure boiler applications and sophisticated multi-level liquid control, the McDonnell & Miller RS-5-BR-1 Holder (Part Number 179528) provides a rugged, mission-critical interface for conductance-actuated monitoring. This five level remote sensor probe holder is engineered with a heavy-duty 2 1/2" NPT tank connection, making it the industry standard for installing multiple conductance level probes in a single tapping. Designed for use with the 750 Series, LPC-2000, and PCH/PCL liquid level control units, this assembly features a NEMA 4X enclosure to protect electrical terminations from harsh mechanical room environments. Whether you are managing low water cut-off or complex pump sequencing, the RS-5-BR-1 handles industrial steam boiler pressures up to 250 psig at temperatures reaching 406°F. This unit simplifies the integration of remote sensor probes in non-metallic or high-pressure metallic vessels, ensuring reliable signal transmission without the need for frequent blow-down maintenance. For technical precision in the field, this holder allows for the individual placement of up to five electrodes at varied set points.

• Multi-Point Detection: Supports up to five independent probe rods for high, low, and intermediate level signaling.
• High-Pressure Capability: Rated for maximum operating pressures of 250 psig for both water and steam.
• Environmental Protection: The NEMA 4X rated housing prevents moisture and corrosion from compromising sensor wiring.
• Versatile Compatibility: Seamlessly integrates with McDonnell & Miller 750 Series and liquid level control modules.
• Simplified Installation: Standard 2 1/2" NPT threaded connection reduces the need for multiple tank penetrations.

Can I use Teflon tape on the NPT threads during installation?
No. In conductance-based systems, using thread sealant like Teflon tape can insulate the holder from the tank, breaking the electrical ground necessary for the sensor to function correctly. Use only a small amount of conductive pipe dope on the upper threads if necessary.

Are the probes included with the RS-5-BR-1?
The RS-5-BR-1 is the holder and enclosure assembly only. Depending on your tank depth and required set points, "P" series probes must be ordered separately in the appropriate lengths.

Is a spacer required for long probe runs?
Yes. If you are using two or more probes longer than 36 inches, it is standard practice to install an S-4 spacer to prevent probe contact and ensure accurate level readings.

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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.