The Igema self-checking low-water alarm monitors a steam boiler for a low-water condition. At the alarm level, the associated burner controls shut down and lock out. Restoring the water level alone does not release the lockout; a manual reset is required after the cause has been corrected.

Self-monitoring is intended to support installations requiring supervised safety functions, including suitably designed unattended boiler operation. The catalogue describes continuous self-checking, stated as 52 checks per second. Select and install the exact limiter, probe and control arrangement in accordance with the boiler manufacturer's documentation and applicable requirements.