Indoor pool operators may soon have access to continuous, real-time monitoring of trichloramine in the air, following the release of a new measurement system that improves ventilation response and reduces exposure risks for swimmers and staff.

Developed by ProMinent GmbH, the system continuously measures trichloramine concentrations in indoor swimming pool environments. The company describes it as the first system to provide continuous, real-time measurement of the compound in pool air.

Trichloramine forms when chlorine reacts with organic substances such as sweat, urine, and skin particles. It is associated with the characteristic chlorine odour in indoor pools and can contribute to irritation of the respiratory tract, eyes, and skin. Concentrations are typically highest directly above the water surface, where swimmers and staff are most exposed.

The system measures trichloramine over the range of 0.00 to 2.00 mg/m³, providing data to support compliance with country-specific air-quality limits in indoor aquatic facilities. The company says the autonomous analysis function can replace laboratory testing previously conducted using hand-held devices and manual sampling.

When elevated concentrations are detected, the system automatically triggers the supply of fresh air. It can also communicate with higher-level control systems via Modbus RTU, relays, and measured-value outputs to adjust ventilation rates. A USB port allows operators to download data logs and complete software updates.

The measuring technology is available as either a permanently installed unit or a portable station and can be integrated into existing pool infrastructure.