Modern water and wastewater treatment processes demand sophisticated equipment for accurate and efficient operations. Metering controllers, measurement devices and mixers like the ones below provide critical functionality, offering automated control and advanced telemetry for reliable and precise operation.

Ixom Watercare GridBee and SolarBee Floating Wastewater Mixers
GridBee and SolarBee Floating Wastewater Mixers from Ixom Watercare are designed to solve a variety of municipal and industrial wastewater quality problems including high energy costs, EPA discharge permit violations and odor control. Not only can these powerful mixers operate 24/7 to improve overall treatment, they can also supply most of the mixing energy required in any treatment pond, which in turn can reduce the operational hours of the existing aeration/mixing system. Available power options include fully grid, fully solar and combined grid-solar. Applications include wastewater ponds, activated sludge, water reuse/effluent storage ponds, and anaerobic ponds. 866-437-8076; www.ixom.com

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De Nora Water Technologies MicroChem 450
The MicroChem 450 controller from De Nora Water Technologies was designed with decades of chlorine management and analysis experience. Easily tailored to meet unique instrumentation needs, process input signals like water flow and residual concentration are applied to user-adjustable preprogrammed control strategies to automatically adjust disinfection feed rates. Automatic process control with the ability to fine-tune to site conditions assures the process remains in control as water conditions change. It is compatible with De Nora gas feed equipment or other systems that utilize a mA control output signal. Its large color LCD shows process inputs at a glance. It gives fingertip access to most common controller settings of ratio and setpoint. Smart software only shows tuning parameters related to the selected control scheme. It has an intuitive software layout and touchscreen display, with 28-day internal datalogging built in, along with six language options. 215-997-4000; www.denora.com

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Lutz-JESCO America TOPAX MC
The TOPAX MC multichannel controller from Lutz-JESCO America has a modular design that makes it an adaptable and effective solution for all measurement and control technology requirements. It offers automated efficiency — freedom from repetitive control tasks while providing accuracy and reliability. Users can actuate the dosing pumps using an optocoupler or relay and servomotors by using a relay or a 20mA output. The high-resolution, 5-inch color display offers a user-friendly operating interface with a simple touch-control and intuitive navigation menu that can be set to multiple languages. Use four analog outputs (0/4-20 mA) or the network capability to transfer measured values to a web browser or a telemaintenance point. A programmable interval timer can be used to set automatic alerts for wear-related sensor change. 800-554-2762; www.lutzjescoamerica.com

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Pulsafeeder Pulsatron MP Series
Pulsafeeder’s Pulsatron MP Series features an optional 4-20mA output signal that provides a remote indication of pump speed to remotely confirm the pump’s speed is adjusting to process parameters, and more accurately estimate chemical usage over time. The pump transmits a 4-20mA signal proportional to the actual speed of the unit and is factory-calibrated for easy installation in the field. It is a true microprocessor-controlled instrument delivering precise and accurate metering control. Packed with standard features, it includes automatic control via 4-20mA or 20-4 mA inputs, an external pace function with a stop feature, and a graphical LCD display with support for English, French, German and Spanish languages. Models are capable of flows ranging between 3 and 504 gpd and pressure ranges from 20 to 300 PSIG with a turndown ratio of 1,000-1. 800-333-6677; www.pulsafeeder.com

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YSI, a Xylem brand 9220 Online TOC Analyzer 
The 9220 Online TOC Analyzer from YSI, a Xylem brand continuously measures Total Organic Carbon and provides stable, accurate data for water quality monitoring, water treatment, and other applications. With heated persulfate and NDIR detection technology, the unit provides performance, reliability and ease of use, with capabilities such as multi-stream analysis and onboard gas generation. It is compliant with EPA-approved methods 415.3 and SM 5310C, and provides water and wastewater facilities with a dynamic, real-time view of Natural Organic Matter levels in influent and effluent streams, enabling them to easily adjust and more precisely control the coagulation, flocculation, and disinfection steps to minimize formation of disinfection byproducts. It directly measures TOC in a wide variety of complex and ever-changing matrices. 937-767-7241; www.ysi.com