Warrick 26MB1M0E Liquid Level Control

Upgrade your system protection with the Warrick 26MB1M0E Liquid Level Control, a heavyweight in solid-state conductivity technology designed for high-performance low-water cutoff. As a veteran-grade 11-pin octal plug module, this 26M Series unit is the industry standard for boiler protection and liquid level monitoring. It operates in direct acting mode with a precise 10,000 ohm sensitivity, supporting a broad 0–26k? range to handle varying fluid conductivities without nuisance tripping. Built for the field, this 120V AC liquid level relay features an SPDT output with powered contacts, simplifying wiring by delivering supply voltage directly to your burners or alarms.

Installation is straightforward for any tech—profiled for no-enclosure mounting, this plug-in module secures into an 11-pin socket (sold separately) and provides a manual reset feature. The critical power outage protection ensures that if voltage drops, the unit recovers its state without manual intervention provided liquid is present, but will latch out on a genuine low-water event for safety. With a rugged operating range from -40°F to +150°F and UL353 limit control certification, the 26MB1M0E is engineered to withstand the thermal stress of mechanical rooms while maintaining CSD1 compliance for commercial boiler applications.

Key Benefits for Contractors and Technicians

• CSD1 Compliance: Meets strict regulatory requirements for boiler low-water cutoff (LWCO) safety interlocks.
• Integrated Manual Reset: Provides essential latching safety, requiring human verification before restarting systems after a low-level trip.
• Powered Contacts: Eliminates the need for additional jumpers; the SPDT relay (10A resistive) outputs the 120V AC supply voltage directly to the load.
• Solid-State Reliability: Traditional conductivity-based level control with no moving parts in the probe circuit for long-term operational stability.
• Diagnostic LED: Front-facing status indicator allows for immediate visual confirmation of relay state and simplifies troubleshooting.

Common Technical Questions

Is the mounting base included with this module?
No, the Warrick 26MB1M0E is the plug-in module only. You will need a standard 11-pin octal socket (such as the Warrick 12.001900 or equivalent) for installation.

What is the difference between this and the 26M automatic reset version?
This model (B1M0E) is factory-configured for manual reset. If the water level drops below the probe, the relay de-energizes and stays off even after the water returns. You must press a normally closed pushbutton (not included) to reset the control. Automatic versions reset as soon as the probe is submerged.

Can I use this for high-sensitivity applications like deionized water?
This unit is factory-set at 10k? sensitivity, suitable for standard tap water and most boiler solutions. For high-resistance fluids like pure distilled or DI water, you may need a higher sensitivity module from the 26M Series (e.g., 50k? or 100k? variants).

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.