Sensors Are The Missing Link For Legionella Control In Buildings And Hospitals

Legionella, Pseudomonas, and Mycobacteria result in significantly more hospitalizations per year than carbon monoxide or fire injuries. However, unlike other hazards, water quality, a key indicator of Legionella growth, is difficult to monitor in building hot water systems. While guidelines from organizations like the CDC and ASHRAE recommend monitoring parameters like chlorine, pH, and temperature, existing sensors are often impractical for hot water loops.

Traditional sensors are costly due to maintenance, reagent requirements (over $700 per year), and the need for a constant waste stream, which wastes approximately 70,000 gallons of heated water annually (costing around $1,350 total in water and energy).

New sensor technology, such as the MP-HOT sensor, makes 24/7 monitoring practical by eliminating the waste stream , requiring no maintenance for 6 to 12 months, and measuring all ASHRAE 541 recommended parameters (chlorine, pH, conductivity, and temperature). These sensors allow for direct pipe insertion and flow/pressure-independent measurements, enabling operators to proactively identify problems and confirm safety throughout the hot water system.

Discover how modern sensing technology enables cost-effective, continuous monitoring for enhanced building resilience and compliance.