Sensor Spray Cleaner Ensures Measurement Accuracy In Dirty Environments

Offering a precision nitrate ISE electrode sensor with an integral self-cleaning sprayer, the new HYDRA Nitrate Analyzer System from Electro-Chemical Devices, Inc. (ECD), is ideal for nitrate monitoring in wastewater treatment aeration basins.

The HYDRA Nitrate Analyzer System monitors the nitrification process in aeration basins at wastewater treatment plants, a process during which toxic ammonium ions are oxidized into much less toxic nitrate ions using an aerobic activated sludge process. De-nitrification reduces the nitrate ion (NO3) to nitrogen gas (N2) by an anoxic reaction in the same treatment basin or in a separate anaerobic digester. The NO3N measurement helps optimize the methanol being fed to the digester, minimizing cost, and also to provide a trend indication of the total nitrogen (TN) in the effluent.

The intelligent HYDRA Nitrate Analyzer System measures the concentration of dissolved nitrate as nitrogen (NO3N) in water. The sensor uses two electrodes to determine the NO3N concentration: a nitrate ion electrode and a chloride ion electrode. An optional electrode is also available for pH or ammonium measurement.

The nitrate ion electrode provides the primary measurement. A second electrode measures the Chloride ions in the sample which interfere with the nitrate electrode. The HYDRA Analyzer subtracts the appropriate amount of signal from the nitrate measurement for accurate monitoring. The sensor also detects temperature, and the analyzer provides a temperature-compensation calculation for accurate measurement.

The rugged ECD HYDRA Analyzer nitrate sensor offers 1.25-inch NPT rear facing threads for attaching an extension/immersion tube for easy installation from catwalks or handrails. Internal signal conditioning allows the sensor to be mounted up to 200 meters from the analyzer. The sensor is extremely low-maintenance, featuring a movable electrode guard to facilitate easy electrode replacement when necessary.

Adding the optional AC10 Automatic Sensor Cleaner decreases HYDRA Analyzer sensor maintenance cycles and helps maintain sensor measurement accuracy in turbid water conditions by preventing the buildup of biofilms and other soft coatings. The AC10 cuts plant operating costs by reducing manual cleaning time and the amount of chemicals used for unnecessary water treatments performed due to inaccurate sensor readings caused by films and coatings that develop over time.

The AC10 can be used as either a Single Channel or Dual Channel System with the HYDRA Nitrate sensor. Combined with a Sensor Spray Head and a C22 Analyzer/Controller, it uses pressurized air to generate an area of high turbulence in the water surrounding the measurement end of the sensor.

The system’s HYDRA Analyzer is configured to periodically actuate a cleaning cycle using the integral spray cleaner in the nitrate sensor, minimizing the formation of biofilms or other coatings on the electrodes and keeping maintenance to a minimum. The cleaning cycles feature a user configurable period and duration. During the cleaning cycle the 4-20 mA output is held at either a preset value or the last value.

The AC10 Air Blast Spray Cleaner features a highly reliable high current contactor that assures years of trouble free service. It is available with either a 115 VAC 3.0 Amp or 220 VAC 1.3 Amp Air Compressor, housed in a rugged, corrosion resistant, fiberglass reinforced polyester enclosure. Installation options include wall mounting or an optional 2-inch handrail mounting system.

Ideal for Municipal Water Treatment, Wastewater Plants, Oil/Gas Refineries, Chemical Plants, Paper/Pulp and Tanneries

With its breakthrough all-in-one design the new SMS-22 Sulfide Ion Measurement System from Electro-Chemical Devices, Inc., (ECD) can be quickly installed with no special tools, features user-selectable automated sequential sampling of sulfide ions in water and lowers plant technician and supply maintenance costs.

Hydrogen sulfide (H2S) is a gas that dissolves in water and gives it a “rotten egg” odor. H2S is present in well water, municipal wastewater and wastewater produced by refineries, tanneries, chemical plants, and paper and pulp facilities. It is typically formed in environments prone to the creation of septic conditions. In addition to odors, excessive concentrations of H2S in wastewater can lead to corrosion and structural damage to municipal water/waste infrastructure including equipment and piping.

The SMS-22 Sulfide Measurement System saves time and labor costs for municipal water operations by completing all the necessary steps to measure sulfide ions in a water sample. Because sulfide ions only exist at high pH values, this is a multi-step process. The SMS-22 conditions the sample, measures the sulfide, neutralizes the sample, measures the pH and drains and rinses the cell. After measurement, the highly caustic sample pH is reduced to a safe level near pH 8.

The ECD SMS-22 is a sequential sampling analyzer. Featuring automated sequential sampling, the Model C-22 Analyzer controls the sequential sampling with a combination of relays and timers. Sampling times are easily adjustable from 2 samples per hour to 10 samples per hour, and this economical system offers very low reagent consumption.

The SMS-22 Sulfide Ion Measurement System uses a sulfide ion selective electrode (ISE) to measure the total amount of sulfide present in the sample. ISE-based S-2 measurement provides a wide measurement ranges of 0 to 5 ppm and up to 500 ppm using economical, easily replaceable electrode cartridges. It features a measuring temperature range of -5 to 50°C (20° to 120°F), accuracy to ±20 ppb or 5 percent of reading, whichever is greater, and repeatability of ±2 percent of reading.

Easy to install and maintain, the SMS-22 features 4-20 mA outputs that display the total sulfide as well as the neutralized pH value. The output values are captured in the measurement cycle and displayed until the next measurement cycle. The rugged enclosure provides IP66 protection and is rated NEMA 4X. The base is made of gray hot-molded fiberglass-reinforced polyester and the cover is made of transparent polycarbonate with non-metallic hinges.

Ideal for Virtually All Processes: Biotech & Pharmaceutical, Chemical, Food/Beverage, Industrial Wastewater, Municipal Drinking Water & Waste, Oil/Gas, Power Generation, Semiconductor

Process and plant engineers seeking a lower cost, lower maintenance solution for multiple analytical measurements will find the integration of advanced SENTINEL predictive maintenance technology from Electro-Chemical Devices, Inc. into its new ModelT80 Universal Transmitter and S80 Intelligent Sensor series minimizes the cost and technician labor required to replace sensor electrodes.

Predictive maintenance is the best way to reduce the cost of maintaining analyzer sensor electrodes. ECD’s SENTINEL technology alerts maintenance technicians to sensor electrode wear so that sensor electrodes are replaced only as necessary. Sensor replacement costs and labor time are reduced to the optimum level, water quality remains constant and other related equipment and systems continue to perform at high levels.

SENTINEL technology from ECD allows the Model T80 Transmitter-S80 Sensor series to provide Pre-pHault diagnostic information about the lifetime of a pH, ORP or pIon measurement. The easy-to-read SENTINEL display graphically shows a filled triangular gauge that decreases proportionally to the degradation of the reference electrode. A filled gauge indicates a new electrode that is functioning properly while an empty gauge indicates an electrode near the end of its useable life. In addition to the graphics, the SENTINEL information is remotely transmitted by various user selected outputs providing an alert notification that the sensor electrode is nearing its useful life and will need replacement to avoid down time.

The plug-and-play Model T80 Universal Transmitter is a single channel transmitter designed for the continuous measurement of seven common industrial plant parameters that include: pH, ORP, pION, Dissolved Oxygen, Turbidity, Conductivity or Resistivity. The Model T80 digitally communicates with any ECD Model S80 Intelligent Sensor and automatically configures the transmitter’s menus and display screens to the measured parameter. The Model T80 automatically configures to any of the listed measurements so that there is no longer any need to inventory multiple instrument types, saving time and reducing plant operating costs.

The T80 Universal Transmitter is flexible and user-friendly. It offers membrane switch navigation, a simple menu structure and soft key menu choices and an easy-to-read 2 ¾ -x- 1 ½ inch LCD display. The T80 accepts any S80 intelligent sensor or any standard pH sensor with solution ground using the optional T80 input card as an input. It is available with 4-20 mA output with MODBUS RTU on 24 VDC and 110/220 VAC instruments. The T80 can be configured with optional HART® 7 communication and optional three alarm relays.

The Model T80 transmitter digitally communicates with any Model S80 Intelligent Sensor, automatically uploading the sensors calibration data and configuring the transmitter’s menus and display screens to the parameter. Versatile Model S80 Sensors are the intelligent sensor choice for a wide variety of applications, available in the following parameters: pH, ORP, Specific Ion, Dissolved Oxygen, Conductivity & Resistivity. S80 Sensors feature two universal sensor designs, Insertion/Submersion or Valve Retractable with flared end to prevent blow out. The standard Model S80 sensors have a rugged ¾-inch O.D. 316 stainless steel body with a 10-foot cable or an optional waterproof detachable cable assembly.

S80 Sensors feature the ECD six-point advantage making them adaptable to most industrial applications. The intelligent sensors store calibration data, have a common configuration for all measurements, are economic with easily replaceable application specific electrode cartridges, in submersible and retractable designs with application specific materials of construction bring cutting edge versatility to ECD’s customers.

Ideal for Freshwater Treatment Plant Filtration Systems

The low maintenance, economical CDA-22 Chlorine Dioxide Analyzer from Electro-Chemical Devices, Inc. (ECD) is ideal for supporting raw water treatment filtration systems. Featuring a panel mounted plumb-and-play design and automatic flow control, the user-friendly CDA-22 is a complete Chlorine Dioxide (ClO2) measurement system.

Treating raw water with ClO2 is an important part of the water purification process. ClO2 is used at very low concentrations (<1 ppm) in filtration systems to precipitate manganese, iron and other minerals in raw water and to break up tannins, which discolor the water often giving it a red hue. Inaccurate ClO2 monitoring may allow levels to exceed acceptable limits, leading to the generation of toxic chlorates.

Raw water sources vary in quality depending on their geographic location, the source type such as natural lake or reservoir, river or canal, etc. Depending on many factors, the level of manganese, iron and tannins varies from source to source. Removing the manganese, iron and tannins helps clarify the water. The CDA-22 Chlorine Dioxide Analyzer ensures that ClO2 levels are properly maintained as part of the water source filtration system, preserving safety and water quality.

Easy to install and maintain, the CDA-22 Chlorine Dioxide Analyzer can run for up to one year between electrolyte/membrane changes. It incorporates a CIO2 sensor, automated flow control device and analyzer/controller mounted on a PVC panel. Installation is complete after connecting the sample and drain lines, power and outputs, and calibration is accomplished with DPD comparison.

The CDA-22 features a polarographic gold/silver PTFE membrane amperometric CIO2 sensor. While these types of sensors are flow sensitive, the CDA-22’s output is virtually flow independent at values greater than 0.5 ft/sec. The CDA-22’s “constant head” flow control device maintains the sensor’s optimum flow over a wide range of
incoming sample flow rates, from 10-80 gal/hr.

The CDA-22’s sensor operates at a wide temperature range of 0 to 100ºC (32 to 212°F). Because temperature affects the CIO2 permeability of the PTFE membrane, increasing the temperature increases the output of the sensor about 4% per C°. The chlorine flow cell includes a temperature sensor that allows the C22 analyzer to perform automatic temperature compensation of the measurement.

The CDA-22 features a 2.5-x1.75-inch backlit LCD display, with 4 lines for text and graphics. It requires no expensive reagents and eliminates pressure regulators and rotometers. The CDA-22 offers dual measurements, an XY graphical plot and an optional PID Control Output. The analyzer provides a 4-20 mA output proportional to the Chlorine Dioxide measured and two alarm relays SPDT 230 VAC/5A or 30 VDC/5A resistive max. It features the options to include additional 4-20 mA outputs for pH or temperature and up to 6 additional relays.

Ideal for Environmental Monitoring, Wastewater Treatment Discharge, Filter or Backwash, Clarity in Settling Ponds, Surface Water, Rinse Water Control

With advanced optical infrared (IR) sensing and intelligent electronics, the versatile Triton® TR6 Turbidity Sensor from Electro Chemical Devices, Inc., measures turbidity or suspended solids and can be combined with ECD’s two-channel C22 Analyzer to monitor pH, ORP, DO, conductivity, pIon and more.

The new Triton TR6 Sensor measures turbidity or suspended solids in four selectable dual ranges featuring pre-set low and high ranges from 0 to 4000 NTU. Its sophisticated optical IR sensor emits a beam of 850 nm (near infrared light) into a water sample where it is scattered by particles suspended in the water. The amount of light reflected back to the sensor by the particles is correlated to the turbidity or suspended solids present in the water.

The flexible Triton TR6 Sensor provides turbidity measurement in milligrams per liter (mg/L), parts per million (ppm) and percent solids to volume depending on the size, shape and composition of the suspended solids in the water. Turbidity measurements (NTU, FNU) are calibrated to the specific user application environment with standards such as Formazin, StablCal or SDVB beads.

Designed for demanding environments, the TR6 Sensor is temperature compensated to achieve accuracy of up to 2 percent of reading or 5 NTU (whichever is larger), features a drift rate of less than 1 percent per month and operates at pressures up to 50 psi. The sensor body is constructed with wetted stainless steel (AISI 316 Ti) and rugged epoxy. The process connection is a 1 inch NPT Nylon fitting and features an optional waterproof cable. It can be installed in either an inline flow cell or submersible configuration up to 500 meters in depth.

The TR6 Sensor is available in two optical sensor configurations. Featuring a choice of either side or axially front mounted optics, the TR6 Sensor addresses the fact that external reflective surfaces in the emitted light’s range can distort readings.

The TR6 Sensor’s side mounted optics minimize interference from surfaces below the sensor while the axially mounted optics avoid interference from reflective surfaces surrounding the sensor. In addition, the TR6’s precision sensor includes a daylight rejection filter blocking sun light and reducing ambient light interference.

The TR6 Sensor is designed to be connected to ECD’s two-channel C22 Analyzer. The C22 Analyzer can be configured as either a single or dual channel instrument. It allows the TR6’s turbidity/suspended solids measurement to be combined with other standard measurements, including pH, ORP, DO, conductivity, pIon and more.

Accurate measurement of turbidity with the Triton TR6 Sensor is important in a wide range of surface water, municipal water and wastewater treatment, and industrial water treatment applications. Turbidity is the cloudiness or haziness of a water sample, which is caused by suspended particles in the water that are typically clay and silt. Viruses and bacteria can attach themselves to the particles making turbidity a critical indicator of overall water quality.

Ideal for Municipal and Industrial Water, Potable Water and Wastewater

Water treatment engineers in need of a versatile and cost-effective Ammonium measurement solution will find that the new MVS10 and MVS17 Ammonium pIon Sensors from Electro-Chemical Devices (ECD) provide a stable and economical in-line measurement platform, helping plants and processes operate smoothly and efficiently with lower operating costs.

Ammonium concentration is a commonly measured parameter in environmental water, potable water and waste water. The MVS10 and MVS17 pIon electrode cartridges measures the activity of “free” Ammonium ions in solution in concentrations from 0.1 to 14,000 ppm over a pH range from 2-8 pH (2-10.5 pH with pH compensation). The MVS and MVS17 Sensors feature industry-leading temperature and pressure specifications, operating over a wide temperature range of 0° to 40° C (32° to 104° F) and at a pressure range of 0-50 psig (0-3.5 bar).

ECD’s MVS10 and MVS17 Ammonium Sensors utilize easily replaceable, long-life electrode cartridges for measurement flexibility and lower operating costs. The MVS10 Sensor is an insertion or immersion-style sensor for use in pipe tees or on the end of a stand pipe for immersion into a tank or pond, while the MVS17 is a valve-retractable design that allows for insertion or removal of the sensor into a pipe without interrupting the process flow. They are fully re-buildable and feature a standard 316 stainless steel body or optional Titanium, grade 2 (T); Hastelloy C22 (H); or Kynar, PVDF (K) body to support a wide variety of applications and operating environments.

In addition to ammonium, the reliable and high-accuracy MVS10 and MVS17 sensors are available in models measuring pH, ORP, dissolved oxygen, conductivity, resistivity and other specific ions including bromide, calcium, chloride, copper, cyanide, fluoride, potassium, sodium and sulfide. All cartridge varieties offer built-in signal conditioning and optionally feature ECD’s SENTINEL “PrepHault” sensor life indicator.

The MVS10 and MVS17 Sensors can be used with the T23, 4-20 mA transmitter or integrated with ECD’s C22 Analyzer featuring dual channel capabilities for pH compensation or two channels of Ammonium measurement. The C22 Analyzer features ECD’s advanced Multi-Bus architecture, enabling customization of up to four inputs and six outputs in a convenient 1/2 DIN NEMA 4X enclosure.

MVS10 Immersion or Insertion Sensor
The MVS10 Sensor is designed with a 0.75-inch MNPT compression fitting as the process connection, allowing a variable insertion length to accommodate installation in pipe tees, flow cells or through tank walls. If the trunk fitting is reversed, the sensor can be installed in a pipe for submersion in a tank.

MVS17 Retractable Sensor
The MVS17 Sensor is designed with a 1-inch MNPT ball valve, a 1-x-0.75 inch reducer and a 0.75 inch MNPT compression fitting to provide the process connection. Loosening the compression fitting allows the sensor to side freely through the ball valve for insertion either into the process or retraction from the process. Once the sensor is retracted, the ball valve can be closed and the sensor can be removed for maintenance or replacement without shutting down the process line.

Ideal For Drinking Water, Surface Water Monitoring, AquaCulture Municipal Wastewater Treatment, Industrial Water Treatment

Combining exceptionally accurate dissolved oxygen measurement with sensor self-cleaning and intelligent communications, the Triton DO8 Self-Cleaning Dissolved Oxygen Monitoring System from Electro-Chemical Devices (ECD) features the Triton DO8 Sensor, the AC10 Air Blast Spray Cleaner and the C-22 Controller.

With a state-of-the-art fluorescence quenching (FQ) sensing element, the breakthrough Triton DO8 Dissolved Oxygen Sensor is ideal for a wide range of municipal and industrial water treatment applications. The trouble-free Triton DO8 Sensor is designed with precision FQ optical technology coupled with intelligent microprocessor-based electronics. The self-monitoring DO8 stores calibration data within the sensor, which minimizes maintenance over long service intervals while providing stable, dependable DO measurement.

The Triton DO8 Sensor is highly accurate, featuring a maximum error rate of less than 2 percent, repeatability of ±0.5 percent and resolution of 0.01 ppm or 0.01 percent saturation. It operates over a wide measurement range with three different outputs from 0 to 20 mg/l (0-20 ppm), 0-200 percent saturation or 0-500 hPa (0-6 psi).

The rugged Triton DO8 Sensor was developed for tough municipal and industrial water treatment environments and is designed to withstand ambient temperatures from -20 to 60°C (0-140°F) and records measurements at temperatures from -5 to 50°C (20-120°F). It withstands pressures up to a maximum of 10 bar (145 psi).

Unlike amperometric sensors, the low-maintenance Triton DO8 has no membranes to replace, no electrolytes to refill and no anode/cathode assemblies to service or replace. The only service required is the simple replacement of the DO8’s sensor cap, which lasts two years or longer, and the occasional wiping of the sensor head with a damp rag.

The AC10 Air Blast Spray Cleaner is available as either a single or dual channel system. It helps maintain sensor measurement accuracy in turbid water conditions by preventing the buildup of biofilms and other soft coatings, decreasing sensor maintenance cycles and helping to cut plant operating costs.

The AC10 minimizes inaccurate readings caused by films and coatings that develop over time on sensors, reducing sensor cleaning time and the amount of chemicals used for unnecessary water treatments. The AC10 uses pressurized air to generate an area of high turbulence in the water surrounding the measurement end of the sensor.

The AC10 Air Blast Spray Cleaner uses a highly reliable, high current contactor that assures years of trouble free service. It is available with either a 115 VAC 3.0 Amp or 220 VAC 1.3 Amp Air Compressor. It is housed in a rugged, corrosion resistant, fiberglass reinforced polyester enclosure. Installation options for the AC10 include wall mounting or an optional 2-inch handrail mounting system.

The Triton DO8 Sensor utilizes digital communications to send DO data to ECD’s C-22 Controller, which provides a 4-20mA output signal to a water treatment plant’s control room. The RS-485 digital signal is nearly immune to common EMI/RFI noise that is typically a problem in many plant environments.