Hydroelectric power plants safety is ensured

Flooding risks are usually caused by poor planning, unpredictable natural events, equipment failure

Since its inception, hydropower has been appreciated as a clean, reliable and sustainable source of power. It produces over 16% of global electricity and is the world's largest source of renewable electricity generation. One of its overriding advantages is that hydropower dams can be used for storing electric energy. However, there are many concerns with large dam facilities: significant impacts on the regional ecosystem, disrupting habitats, and fatal consequences - even if accidents are rare.

Our Offering

All hydroelectric power stations face environmental and technical challenges. Regardless of where the plant is geographically located, rooms housing the machinery have to deal with high relative humidity, moisture, and water that can be acidic and may contain bacteria, sand and/ or debris. Our network of engineering, sales and service staff has profound know-how on power production under every conceivable condition. This knowledge serves to deliver the appropriate answer to your environment.

  • Process automation that allows you to work with ease

  • Optimal performance through efficiency and functionality

  • Standardized technology and equipment

  • Experience in modernizing hydropower plants

  • Support throughout the whole operational life cycle

Hydroelectric power plant process

Hydroelectric power plant process map ©Endress+Hauser

Main critical applications

Temperature measurement at bearings in the turbine, generators and shafts

Bearings in the turbine, generators and shafts

Temperature measurement is essential to ensure that the plant works properly. Any hot point in the bearings must be identified so that appropriate action can be taken to prevent heat loss through friction, wear and tear or possible equipment destruction. How do you cope with such an application? Have you heard about our iTHERM® StrongSens RTD sensor technology?

  • Unsurpassed vibration resistance (> 60g) for ultimate plant safety

  • Reduced maintenance and downtime

Level measurement in the pressurized air-oil tank

Speed and break control system

Measuring level in the pressurized air-oil tank avoids any over speed in the turbine that could damage the whole power station. The level can be determined either by using differential pressure transmitters or by using a guided wave radar mounted directly in the tank or in a bypass chamber solution. It is critical to clean the oil and identify leaks to ensure proper functioning of the system. How do you monitor oil pressure?

  • Reliable pressure transmitters that can withstand upwards of 600 psig

  • Hermetically sealed Contite measuring cell with condensate-resistance for our Deltapilot product range

  • Safe and reliable function regardless of tank geometry for our Liquicap product range

High ambient temperatures measurement in high voltage areas

High voltage areas like conduction bars, thyristor bridges

High ambient temperatures in high voltage areas are dangerous and therefore must be monitored continuously. Fire detectors should be provided as a safety precaution. The ambient temperature sensor Omnigrad has been designed specially for this purpose, and can include a temperature transmitter assembled in the head.

  • Types of protection for use in hazardous locations: Intrinsic safety (Ex ia) and non-sparking (Ex nA)

  • High flexibility through user-specific insertion lengths and variable process connections

Ultrasonic level devices installed on drainage pumps

Drainage pumps

Failure of the level measurement that controls the drainage pumps can indicate an increase of the water level and an eventual flooding of the station. Therefore water-level, flood and evacuation alarms are an absolute necessity. It is common to use floats or conductivity level measurements but these can fail due to high humidity and corrosion. Good alternatives are ultrasonic or hydrostatic level devices such as the Waterpilot.

  • Maximum plant safety provided by one-of-a-kind, condensate-proof Contite measuring cell

  • Flood protection schemes can be implemented to automatically close intake gates or hilltop valves and keep turbines operating

Level measurement in surge tanks by Endress+Hauser

Surge tanks

The main purpose of a surge tank is to control pressure variations due to rapid changes in the velocity of water. It may be desirable to operate at the tank's level limits to keep the product concentration and quality constant or enable the product formation rate to continue to meet production rate requirements. This implies that greater demands are put on level measurement accuracy. We have the experts who can advise you the best fit solution for your crucial checkpoints.

  • Robust overload-resistant high purity ceramic sensor

  • Highest accuracy level using temperature compensated density correction

  • Limit values can be monitored and relays can be switched. Analog outputs process signals can be forwarded.

  • SIL2 approval (optional)

Browse through our portfolio!


Our highly trained services and sales staff partner with you to assess the potential to be gained by high-end measurement and automation to improve safety, efficiency and minimize downtime. Our project management and engineering staff accompany plant improvement from the outset – with experience and skills that go beyond instrumentation.

  • > 10

    years of experience in hydroelectric power projects, including project engineering for over 14500 MW of installed capacity

  • One-stop

    shop supplier. We deliver the most complete instrumentation portfolio along with local service and project management