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Solutions That Provide PEace of Mind

It is only through the precise measurement and analysis of the voltage-current-time relationship of every individual cell that the earliest possible detection of all probable electrolyser malfunctions can be achieved. Hazardous situations can consequently be avoided by enabling an emergency shutdown of the individual power supply thus preventing irreversible damage to equipment and/or personal injuries.
Most of the global players in the chlor-alkali, chlorate, and water electrolysis industries trust EMOS® for the safety of their cell rooms.

However, these technologies are also more sensitive. Many incidents have happened worldwide after changing from the previous “workhorse” cells to the current “race horse” cells.

Traditional Monitoring Systems

A voltage deviation system (EDI), or Balance Voltage Monitoring System (BVMS) as it is also called, is the traditional method of providing protection to membrane electrolyzers. The EDI (or BVMS) measures the voltage difference between (2) halves of the electrolyser. If the voltage difference is greater, or lower, than a certain set value, the EDI (or BVMS) will automatically shut down the power source of the electrolyser.

The EDI (or BVMS) lacks the capability of individual cell performance analysis and safety; its large voltage measuring range is prone to excessive noise, preventing it from providing adequate detection limits.
A BVMS cannot protect against the worst incidents (membrane ruptures and short circuits) because the voltage decrease of a problematic cell is compensated by the voltage increase of neighboring cells. The total voltage change of the group of cells is then too small to be detected.

EMOS®: A Unique approach to safety

EMOS® has been designed to provide the most precise individual element voltage measurement available for electrolytic cells (±1.5mV). Hardwired interlock functions have been integrated into EMOS® in order to shutdown an electrolyser independently from the plant network and with a response time of less than 1 second in case of a spontaneous malfunction of any individual cell.

The safety of your chlor-alkali, chlorate, and water electrolysis cell-room is our primary objective. We offer products that help protect against faults (some of them producing irreversible damage) caused by a variety of issues such as:

  • Explosions
  • Release of toxic gases
  • Anode coating loss
  • Cathode coating loss
  • Electrode passivation
  • Membrane poisoning
  • Insufficient electrolyte feed
  • Cell temperature control failure
  • Electrolyte concentration control failure
  • Differential pressure out of range
  • Cell leakage
  • Membrane pinholestears, and blisters
  • Short circuits

EMOS® SIL2 Safety System

The electrolyzer cell room safety system that helps prevent and protect against irreversible damage caused by all known events.

EMOS® Pinhole Detector

Automatically detects pinholes during startup and shutdown and identifies their severity.

EMOS® Early Detection Engine

Detects abnormal cell behaviours hours before they become a safety issue, preventing unplanned shutdowns and production losses.

EMOS® Advisory

Powered by AI and machine learning it detects faults early and advises operators on appropriate actions.

EMOS® Single Cell Temperature Evaluator

Calculates and displays individual cell temperatures using heat balance allowing operators to adjust process parameters.