Water level control relay for a single tank with overheating protection - Tense SSR-09

Product description

The SSR-09 relay by Tense is a modern unit designed for automatic water level control in boilers, storage tanks, and water heaters.
It provides reliable water supply, timely pump shutdown, and especially 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 based on the current tank status.

Key advantages

• Dry run protection for the boiler and heater - extends equipment lifespan.

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

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

• Operation indication of the pump and heaterwith an LED for easy status checking.

• Easy installation - mounting on DIN rail, transparent screw terminals.

• Compact dimensions, low consumption.

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

Operating principle

The SSR-09 device operates with two electrodes in the tank:

1. Lower electrode (minimum level)

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

2. Upper electrode (highest level)

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

3. Protective electrode on the heating element

   • If there is no water in the heating element, the relay cuts off power to the heating element to prevent overheating.

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

Website usage

• Electric boilers and storage water heaters

• Heating systems with storage tanks

• Water storage tanks for households and industry

• Plumbing and pumping systems

• Tanks for drinking or household water

Installation and connection

• Mounting on a standard DIN rail in the cabinet.

• Connection with screw terminals.

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

• For stable operation, the manufacturer recommends using conductors of at least 2.5 mm².

Note: Electrodes (level measurement probes) are not included and must be ordered separately.