Water level control relay for one tank with heater protection - Tense SSR-09

Product description

The SSR-09 relay from Tense is a modern unit designed for automatic water level control in boilers, storage tanks and water heaters.
It ensures reliable water supply, timely pump shutdown and, above all, effective protection of the electric heating element against dry running.

The device uses capacitive electrodes to monitor the water level and automatically controls the pump and heater according to the current situation in the tank.

Key advantages

• Dry-running protection for both the boiler and the heater - extends the life of the equipment.

• Automatic water level control: the pump switches on when the water level is low and switches off when it reaches the upper level.

• Heater protection - if no water is present at the heater, the device immediately blocks its power supply.

• LED indication of pump and heateroperation for easy status checking.

• Easy installation - DIN rail mounting, clear screw terminals.

• Compact dimensions, low consumption.

• Wide operating voltage range of 170-260 VAC - stable operation even during power fluctuations.

Operating principle

The SSR-09 works with two electrodes located in the tank:

1. Lower electrode (min. level)

   • If the water level drops below this electrode, the relay activates the pump and starts pumping water.

2. The upper electrode (max. level)

   • When the upper level is reached, the relay automatically switches off the pump.

3. Protective electrode at the heating element

   • If there is no water at the heater, the relay will cut off power to the heater and prevent overheating.

This intelligent logic ensures safe and economical operation of the entire system.

Using

• Electric boilers and storage water heaters

• Heating systems with storage tank

• Domestic and industrial water storage tanks

• Waterworks and pumping systems

• Drinking or domestic water tanks

Installation and connection

• Mounting on standard DIN rail in the cabinet.

• Connection via screw terminals.

• Electrodes must be installed in the tank at the required levels.

• For stable operation, the manufacturer recommends the use of minimum 2.5 mm² conductors.

Note: The electrodes (level probes) are not included and must be ordered separately.