Electronic Low Water Cut-Offs for Steam Boilers, 24V

Hydrolevel Safgard 400 – Electronic Low Water Cut-Off for Steam Boilers

The Hydrolevel Safgard 400 is an electronic low water cut-off designed to protect residential and light commercial steam boilers from operating under unsafe low water conditions. Engineered for direct boiler mounting, it eliminates the need for float chambers or routine blowdowns and delivers reliable performance in demanding hydronic applications.

Engineered for Safety and Efficiency

This control is purpose-built to prevent dry-firing, a leading cause of boiler failure. Its solid-state sensing technology and delay features help reduce nuisance shutdowns due to temporary water level fluctuations, improving the efficiency and longevity of the heating system.

Key Features of the Safgard 400

• Electronic Monitoring – Provides accurate, maintenance-free water level detection without the need for moving parts.
• Burner Off Delay (15 Seconds) – Helps avoid unnecessary lockouts from brief drops in water level.
• Burner On Delay (30 Seconds) – Ensures safe burner restart only after the water level has stabilized at the probe.
• Automatic Reset Function – Restores normal operation automatically when water returns to a safe level.
• Low Water LED Indicator – Illuminates to alert the user when water falls below the sensing probe.
• Direct Mount Design – Mounts directly into a boiler’s ¾" NPT tapping, simplifying installation and removing the need for external piping.

Specifications

• Model: 45-400
• Voltage: 24V
• Reset Type: Automatic
• Application: Steam boiler primary low water cut-off

Installation Notes

This control is designed for use in steam boiler applications and should be installed by a qualified technician familiar with electrical safety, boiler controls, and local plumbing codes. Proper probe positioning and control wiring are key to ensuring safe and compliant operation.

Contractor Insights

Professionals rely on the Safgard 400 for its dependable low water detection and straightforward setup. The combination of electronic sensing and built-in time delays minimizes service callbacks, making it a time-saving choice for routine installations and system upgrades alike.

Protect Your Boiler with Proven Control

Hydrolevel’s Safgard 400 provides a trusted, field-tested safeguard against one of the most common causes of boiler damage. With simple operation, no blowdown maintenance, and reliable electronic performance, it’s a smart solution for protecting steam heating systems from dry-fire risks.