Electro-Chemical Devices

MVS10 and MVS17 sensors
The MVS10 and MVS17 sensors determine ammonium concentrations for water and wastewater applications. They operate at temperatures from 0°C to 40°C and at pressures from 0 to 50 psig. The sensors use long-life electrode cartridges to measure the activity of ammonium ions at concentrations of 0.1–14,000 ppm over a pH range of 2–8. The MVS10 is an insertion- or immersion-style sensor that may be used in pipe tees or on the end of a standpipe. The MVS17, with its retractable design, may be inserted into a pipe without interrupting the process flow. Both sensors are also available in models that measure pH, oxidation reduction potential (ORP), dissolved oxygen, conductivity, resistivity, and other specific ions.

CDA-22 chlorine dioxide analyzer
The CDA-22 chlorine dioxide (ClO2) analyzer features a panel-mounted plumb-and-play design and automatic flow control in a low-maintenance complete measurement system for monitoring and control of chlorine dioxide ClO2 in municipal water systems, industrial cooling and rinse water, wastewater, or fresh water. It uses a polarographic gold/silver polytetrafluoroethylene (PTFE) membrane amperometric ClO2 sensor to measure ClO2 concentrations ranging from 0.05 ppm to 20 ppm. The analyzer/controller is mounted on a PVC panel and features a 2.5-in. × 1.75-in. backlit LCD display with four lines for text and graphics. It offers dual measurements, an XY graphical plot, and an optional PID control output. The analyzer requires no expensive reagents and eliminates pressure regulators and rotometers. It provides a 4–20 mA output proportional to the measured ClO2 concentration, and two alarm relays (single-pole, double-throw [SPDT] 230 VAC/5A or 30 VDC/5A); additional 4–20-mA outputs for pH or temperature and up to six additional relays can be included.