Pyxis Titronex MFA-100 / MFA-110 Pump-Free Chlorine Analyzers

The Titronex MFA-100 (free chlorine) and MFA-110 (total chlorine) are pump-free online colorimetric chlorine analyzers from Pyxis. They work directly from a pressurized process sample with ultrasonic flow control and a sealed single-liquid DPD reagent cartridge instead of peristaltic pumps. The Titronex MFA series is the Pyxis pump-free wet chemistry analyzer platform; the other members of the family (MFA-310 orthophosphate, MFA-400 anionic polymer, MFA-600 calcium hardness) are outside the scope of this page, which covers only the chlorine and oxidizer models MFA-100 and MFA-110. In Turkey, Mikron Proses (Üsküdar, Istanbul) provides application consulting on model and configuration selection.

Free or total chlorine · Measuring interval · Configuration → Send us your requirement

For more Pyxis analyzers, see Online Analyzers.

How the pump-free architecture works

Unlike conventional analyzers, the MFA-100/110 does not need several peristaltic pumps and tubing assemblies. Process water enters the analyzer under pressure through a 316L stainless steel sample inlet and is routed to the colorimeter chamber at a constant, programmable flow rate through a motorized valve that is continuously regulated by the FS-100 ultrasonic flow meter. During standby periods, a 3-way valve either directs the water to drain (constant flow mode) or isolates it (water-saving mode). When a measurement starts, the reagent in the sealed cartridge is dosed into the chamber by a gravity-assisted tube-roller mechanism; conventional dosing pumps are not used. According to the manufacturer, this reduces mechanical wear, minimizes service requirements and improves long-term measurement reliability.

MFA-100: free chlorine

The MFA-100 (P/N 40196) measures free chlorine in the range 0-5 ppm Cl2, with an accuracy of ±0.04 ppm or ≤ 5% of full scale and a detection limit of 0.03 ppm. The measuring method is the DPD (N,N-diethyl-1,4-phenylenediamine) colorimetric method. The reagent is the FCL-100 cartridge (400 mL), which has a patent-pending formulation that combines buffer and indicator chemistry in a single stabilized liquid; with a 6-month shelf life, the manufacturer states a longer reagent life than conventional multi-reagent DPD analyzers. A cartridge lasts up to 16,000 measurements depending on the selected measuring interval (for example, about 55 days of continuous operation at a 5-minute interval).

MFA-110: total chlorine

The MFA-110 (P/N 43485) measures total chlorine in the same 0-5 ppm range and with the same accuracy class (±0.04 ppm or ≤ 5%); it uses the same DPD colorimetric method but works with the TCL-110 reagent cartridge (400 mL, 6-month shelf life, up to 16,000 measurements per cartridge).

Display, outputs and ambient conditions

Both models share the same UC-60 controller: a 4.3 in color touchscreen, 2 × 4-20 mA analog outputs, 1 × isolated RS-485 Modbus RTU and 2 × SPST dry-contact relays (5 A, 250 VAC / 30 VDC). The sample inlet pressure must be 0.05-0.5 MPa (7.25-72.5 psi) and the flow is kept between 100 and 500 mL/min; the inlet, outlet and drain connections are ¼ in tube fittings. The panel operating temperature is 0-50 °C and storage is -20 to 70 °C; it measures 144 × 144 × 120 mm and is rated IP65. A built-in 4G CloudLink gateway can be activated on request with enrollment.

Which model (free or total chlorine) and which measuring interval suits your process depends on water quality and the existing automation infrastructure. Tell us your requirement and we will define the right model and configuration together with you.