LP30 Self-monitoring Level Probe

Where LP30 fits in boiler level safety protection

LP30 is a self-monitoring level probe within the Spirax Sarco level sensor range, sitting at the model-specific end of the level controls route. It is used on steam boilers for low-level safety protection, triggering an alarm or interlock action when water level falls to a dangerous low point.

Unlike a standard level probe, the LP30 has built-in self-diagnostics that continuously monitor its own operating condition, ensuring reliable action when needed. This high-integrity design makes it particularly suited as a critical sensing component in boiler safety protection systems.

Typical application scenarios

LP30 is a good route when the project needs:

• a high-integrity low-level safety protection solution for steam boilers
• a self-monitoring level probe for boiler safety interlock systems
• a level alarm solution that meets boiler safety compliance requirements
• to work with an LC2650 or LC3050 level controller to form a complete level control loop

LP30 is not typically used on its own. It is usually deployed alongside level controllers such as LC2650 or LC3050 and alarm systems. If the project requires continuous level modulation control rather than safety alarm functionality, review other products in the level controls range.

What to confirm before specification

Before specifying the LP30, confirm the following site conditions:

• the boiler rated working pressure and evaporation capacity
• the level control architecture on site and the LP30 role in the system (primary alarm, backup protection, or interlock trigger)
• the compatible level controller model in use (e.g. LC2650 or LC3050)
• the installation method (directly on the boiler shell or via an external electrode chamber)
• whether coordination with other safety protection devices is required

If the project focus is boiler water quality management rather than level control, continue into TDS blowdown controls. If the focus is understanding level control principles and methods, the automatic level control knowledge page is more appropriate.

LP30 and related product paths

LP30 is usually deployed alongside level controllers, other level probes and boiler house safety protection systems rather than in isolation.

• Return to level controls to continue understanding the level control path at the family level.
• See TDS blowdown controls to support the boiler water quality management path.
• See boiler controls to continue comparing blowdown, heat recovery, vent hardware and other boiler house control products.