Latest Ammonium HYDRA-DS Analyzer Determines the Dissolved Ammonium Concentration and Helps Maintain Water Quality

Press Release Summary:

Electro-Chemical Devices presents the HYDRA-DS analyzer for simple and accurate measurement of harmful nutrients like nitrogen. The HYDRA-DS can determine the nutrient load in rivers, streams, and lakes as well as wastewater treatment plant aeration basins. The analyzer consists of advanced ion selective electrode sensors (ISE) and a 2.5 x 1.75 inch LCD display transmitter. The ISE sensors use 3 electrodes to determine the concentrations of ammonium (NH4), potassium (K+), and pH to ensure reliable performance. The analyzer has wide measurement ranges from 0.1 to 14,000 ppm and operates over a flow rate range from 0.1 to 3.0 m/s.

Original Press Release:

New ECD Ammonium HYDRA-DS Analyzer Simplifies the Accurate Measurement of Nitrogen (Nutrients)

Ideal for Reliable Surface Water Monitoring and Wastewater Treatment Plants

Anaheim, CA—June 21, 2018—Designed with advanced ion selective electrode (ISE) sensors and a highly intelligent transmitter, the new plug-and-play Ammonium HYDRA-DS Analyzer from Electro-Chemical Devices (ECD) simplifies the accurate measurement of harmful nutrients (nitrogen) over a broad range to help assure water quality.

The Ammonium HYDRA-DS Analyzer measures the nutrient load in rivers, streams and lakes as well as wastewater treatment plant aeration basins. It determines the concentration of dissolved ammonium as nitrogen (NH4+-N [nutrients]) in water.  The sensor uses three electrodes to determine NH4+-N concentrations:  ammonium (NH4), potassium (K+) and pH (acidity versus alkalinity levels).

The HYDRA-DS Analyzer’s dependable NH4, K+ and pH ISE sensors are fully compensated for interferences and temperature variability to ensure reliable performance.  The ISE sensors are housed in a rugged, removable PVC tube guard for easy access.  A built-in spray cleaner provides in-situ cleaning for automated, predictive maintenance with pressurized water or air to prevent algae or other film growths and to avoid technician cleaning labor.

The HYDRA-DS Sensor’s NH4 electrode provides primary sensing and measurement. Any potassium ion in the sample generates a positive (K+) interference in the measurement due to its similar size and charge to the NH4 ion. The K ion electrode measures the amount of potassium ion present in the sample, and the T80 Transmitter subtracts the appropriate amount of signal from the NH4 measurement.

The NH4 ion electrode only measures the ammonium ion (NH4+)--not ammonia (NH3). The ammonium ion and ammonia coexist in a pH dependent ratio in solution. The more acidic pH values favor the NH4+ and the more basic values favor dissolved ammonia gas (NH3). The pH electrode measures the pH, and the analyzer’s T80 Transmitter calculates the total NH4+-N level based on the pH versus NH4+ concentration profile stored in the instrument.

The rugged HYDRA-DS sensor has 1.25-inch rear facing threads for attaching an extension/immersion tube for easy installation from catwalks or handrails. The HYDRA sensor is submersible with an IP68 rated degree of ingress protection. Its digital sensor design supports virtually any size length of cable.

The HYDRA-DS Ammonium Analyzer operates over a wide measurement range from 0.1 to 14,000 ppm with a T90 response time of 1 minute.  Accuracy is ±3% of reading (dependent on calibration). The sensors operate over a flow rate range from 0.1 to 3.0 minutes per section (m/s).  Operating temperature range is from 32 to 122°F (0 to 50°C)

The transmitter features an easy-to-read 2.5-x-1.75-inch LCD display housed in a water-resistant NEMA 4X enclosure.  Two 4-20A outputs are provided with Modbus compatibility (optional HART) for integration with plant distributed control systems. Input power is 110/220 VAC/5A. There are three SPDT relay alarms (230 VAC, 5A), including one for the spray cleaner.

About Electro-Chemical Devices

Electro-Chemical Devices (ECD) is a manufacturer of liquid analytical process instrumentation. Founded in 1977, ECD has been in business for over 40 years and has built its industry leading reputation by its commitment to customers through this basic approach: Provide quality products, develop technical innovations and provide responsive, knowledgeable service.

Company Contact:  Ryan Balgos

Company Address: 1500 N. Kellogg Dr., Anaheim, CA 92807 USA



Tel: 800-729-1333 Tel: 714-695-0051

Fax: 714-695-0057

Editor’s Contact: Randy Brown: 909-223-6700



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