Liquid level relay for steam boilers

Boiler water level control relay for installation in water heating systems, allowing the electric heater to be switched off in case of water shortage, for single-tank systems. SSR-09 TENSE

The SSR-09 is an advanced boiler water level control relay designed for automatic water supply regulation and protection of the heater from dry operation. The device monitors the presence of liquid in the tank and automatically switches the pump and heater on or off depending on the water level.

Main advantages

Boiler and heater dry-running protection extends equipment life.

Automatic water level control: the relay switches on the pump when the water level is low and switches it off when the upper limit is reached.

Status indicators: built-in LEDs show the operation of the pump and heater.

Easy installation: DIN rail mounting, convenient terminal connections.

Compact size and energy efficiency.

Wide voltage range (170-260 VAC): stable operation even in case of overvoltage.

Operating principle

The SSR-09 relay uses electrodes to detect water level:

When the water level drops below the set mark, the device switches on the pump to fill the tank.

When the water level reaches the upper limit, the pump automatically switches off.

If there is no water near the heater, the relay blocks the power supply to the heater to prevent it from overheating.

This logic ensures that the boiler always operates safely and economically.

Usage

Electric boilers and thermal storage units

Heating systems with a tank

Water supply stations and pumping stations

Drinking or domestic water and service water tanks and storage tanks

Installation and connection

Installation is done on a standard DIN rail in a cabinet.

Connection is made via screw terminals. Electrodes are installed in the tank at the required level (upper and lower regulation).