Pump-free chemistry: The next evolution in online water analysis

For years, online colourimetric analysers have had a notorious reputation: high maintenance, intricate tubing networks, reagent instability, and frequent pump replacements. In many industrial plants, operators have simply accepted these issues as the cost of achieving dependable wet-chemistry measurements. The Titronex™ MFA-Series from Pyxis Lab, Inc. was designed to change that.

Rather than improving the traditional analyser architecture, the MFA-Series rethinks it entirely. By eliminating conventional peristaltic pump systems and replacing them with a pressurised process-flow design utilising ultrasonic flow control and sealed disposable reagent cartridges, the platform dramatically simplifies online colorimetric analysis while improving long-term reliability.

The concept is simple but effective: fewer moving parts mean less maintenance. Instead of relying on multiple pumps and tubing assemblies that are prone to wear and drift, the MFA-Series employs integrated ultrasonic flow regulation and a gravity-assisted reagent delivery system to keep measurement conditions stable. The result is less mechanical wear, reduced service needs, and more consistent measurements in tough industrial settings.

The platform was also engineered with real-world operations in mind. The analyser supports inlet pressures of 7.25–72.5 psi and regulates sample flow between 100–500 mL/min, offering both constant-flow and water-saving operating modes. 316L stainless steel wetted components, touchscreen controls, Modbus communications, relay outputs, USB data export, and optional 4G connectivity position the MFA-Series as a modern monitoring platform rather than a traditional laboratory analyser adapted for the field.

What further sets the MFA-Series apart is its versatility across various chemistry applications. The MFA-600 offers ultra-low hardness monitoring for boiler feedwater, softener discharge, and RO systems with detection limits down to about 0.035 ppm calcium hardness. The MFA-100 and MFA-110 make free and total chlorine monitoring simpler by using stabilised single-liquid DPD reagent technology with an extended shelf life. Meanwhile, the MFA-310 provides orthophosphate monitoring for corrosion and nutrient control programmes, while the MFA-400 measures residual anionic polymers in industrial water treatment systems.

Taken together, the MFA-Series reflects a broader shift occurring across industrial water treatment: moving away from maintenance-heavy analytical systems toward smarter, lower-maintenance platforms designed for automation, remote monitoring, and long-term operational stability.

As facilities continue to prioritise uptime, labour efficiency, and simplified operations, pump-free analyser technology may no longer be an alternative — it may become the future standard for online water analysis.