New SCADA at United Nations – Bangkok

In October 2025 the Elgressy EST water treatment system at the United Nations building in Bangkok received a new SCADA monitoring and control system. EST has protected this cooling plant without chemicals since 2013; the new SCADA gives the facility team a clearer, real-time view of the whole system.

What the new SCADA shows

The main screen shows a 3D overview of the plant: the four cooling towers, the EST reactors, pumps, valves and pipework. For each EST unit (EST-1 and EST-2) the operator sees live:

• pH and conductivity of the cooling water
• Reactor voltage and current
• Pump, drain valve and dosing pump status
• High-pH alarm and fault status

The screen also shows outdoor conditions and the chilled-water supply and return temperatures, so water treatment and chiller performance can be watched together.

Why it matters

• Problems are seen early: alarms and fault messages appear the moment a value goes out of range.
• Less guesswork: the team can confirm at a glance that every EST reactor is running and draining correctly.
• Records for audits: trends of pH, conductivity and power support reporting for green building certification and sustainability goals.

The earlier SCADA

The site has used Elgressy SCADA for years. The previous process screen showed the four EST reactors with their scraper motors, drain and return valves, two circulation pumps and the four cooling towers, with separate pages for process variables, alarms, alarm events and graphs. The 2025 upgrade keeps these functions in a more modern, easier-to-read interface.

Want to see more? Read the full United Nations Bangkok case study, with approach temperature and energy savings, or learn about our SCADA remote monitoring options.

Related

• Case study: EST at United Nations Bangkok
• Energy cost savings 1 year after installing EST
• SCADA remote monitoring for water treatment

Want real-time monitoring at your site?

Water Treatment Asia (Aerial Lift Asia Co., Ltd.) has been the exclusive Elgressy distributor in Southeast Asia since 2010. Contact us for a free water analysis, a savings estimate and a visit to one of our reference sites.