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Nutrient Monitoring

Continuous monitoring of nutrient levels provides crucial information about daily, seasonal and event based changes in water quality conditions, and can be a strong indicator on the overall health of the water body.  In recent years, monitoring of...

Coastal & Estuary

Measurement of water quality in coastal regions and estuaries is critical in the characterization of hypoxic ‘dead zones’ as a result of nutrient loading and algal blooms in the water bodies. Sediment loading analysis through turbidity measurement is...

Groundwater

Measuring groundwater level or depth-to-water is critically important for identifying long term trends, including declining water levels, saltwater intrusion, seasonal variations, aquifer recharge, artificial aquifer storage and recovery, and level...

Mining

Ensuring that pollutants from mining activities do not enter surrounding natural water bodies is a key issue in environmental monitoring and regulatory compliance. Hydrolab multiparameter sondes can measure a variety of parameters pertaining to...

Urban Hydrology

Urban Hydrology deals with the specific aspects of the hydrological cycle in urban and industrial settings. This includes all natural water flows as well as the consideration of precipitation, storm water, groundwater, rivers, and lakes, but also the...

Monitoring ditch water quality using OTT ecoN, Hydrolab HL4 and XLink 500

The RIVM in the Netherlands is using the OTT ecoN and the Hydrolab HL4, connected to an XLink 500 datalogger, to monitor the temporal variation of nutrients in ditch water. The data is sent to Hydromet Cloud. The goal of this project (WaterSNIP) is...

Oil & Gas

Monitoring natural water bodies surrounding oil and gas drilling activities like hydraulic fracturing is a key issue in environmental monitoring and regulatory compliance. Hydrolab multiparameter sondes can measure a variety of parameters pertaining...

Agriculture & Irrigation

OTT Hydromet sensors can provide key information on trend identification and regulatory compliance for water quality and quantity parameters around agriculture and irrigation activities. OTT water level and flow sensors can measure the discharge of...

Surface Water

Measuring water quantity and quality in surface water (open channels, rivers, reservoirs, lakes, and estuaries) is one of the foundations of hydrological monitoring and has been a focus of OTT Hydromet since its first  water current meters were...

Hydropower

Monitoring the impact of Hydropower plant activities on water bodies can be important for regulatory compliance and modeling purposes.Hydrolab instruments can measure total dissolved gas (TDG) levels around Hydropower activities and both Hydrolab and...

Water quality monitoring at the "Klingenberg" dam in Saxony, DE

The Klingenberg dam is located in the Free State of Saxony and serves the drinking water supply of Dresden and large parts of the former Weißeritzkreis area. Besides, it contributes to flood protection and, to a small extent, to energy generation. ...

Hydrolab Operating Software

The Hydrolab Operating Software is the PC-based application for interfacing with Hydrolab HL Series sondes, the Hydrolab Surveyor HL, and Hydrolab communications modules.  It is designed for intuitive water quality data collection, sensor...

Hydrolab HL4 Multiparameter Sonde

The Hydrolab HL4 is the next generation multiparameter water quality sonde from OTT Hydromet.  Know the instrument is working correctly and troubleshoot quickly. Streamline calibration tasks and produce valid, scientifically defensible conclusions.

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Hydrolab HL7 - Multiparameter Sonde

The HYDROLAB HL7 multiparameter sonde offers a versatile, durable and practical solution to the day to day needs of monitoring programs for both simple and complex deployments. With a large sensor suite, it is able to thrive in demanding...

News and Pressroom

ISE stands for "ion-selective electrode" and describes a sensor that converts the activity of a certain ion dissolved in water into an electrical potential. The newly introduced ISE sensors for ammonium, nitrate and chloride from HYDROLAB...

Turbidity Sensor

Hydrolab sondes use a self-cleaning turbidity sensor that measures from 0 to 3000 NTU and includes a user-programmable cleaning system to remove fouling or debris that could potentially affect readings.

Remote Water Quality Monitoring in South Africa

Situated in the Mpumalanga province of South Africa, the Xstrata Coal South Africa (XCSA) runs several open cut and underground mining operations producing thermal coal.To ensure their mining operations do not affect the surrounding natural water...

Blue Green Algae Sensor

The blue-green algae sensor from Hydrolab is based on the Turner Designs Cyclops-7 submersible fluorometer.  Two versions are available, one for phycocyanin and one for phycoerythrin.

Groundwater Monitoring around Hydraulic Fracturing Sites in Colorado

Hydraulic fracturing or ‘Fracking’ has become more prevalent and controversial in the US in recent years. More than 90 percent of new wells in the US are completed using this method. While it is endorsed by some as a game-changer that promises an...

Chlorophyll a Sensor

The chlorophyll a sensor from Hydrolab is based on the Turner Designs Cyclops-7 submersible fluorometer. 

pH Sensor

The Hydrolab pH sensor uses a glass bulb measuring electrode and refillable reference electrode.

There are two versions available:

• pH with standard reference uses a separate measuring electrode and reference electrode, each in their own sonde port
• pH...

Hydrolab Surveyor HL Handheld

The Surveyor HL is the handheld display that connects to the Hydrolab HL4 for attended monitoring applications and for completing other common tasks with the sonde in the field. It is rugged and compact with a color screen that is visible in direct...

Temperature Sensor

The Hydrolab temperature sensor is a variable resistance thermistor. The temperature sensor is included with every Hydrolab sonde.

Dissolved Oxygen Sensor (Clark Cell)

The Hydrolab Dissolved Oxygen sensor is based on the EPA-approved Clark Cell design, and has been trusted for over 30 years.

Depth

Hydrolab sondes are available with integrated pressure sensors that provide depth measurements.

Conductivity Sensor

The Hydrolab conductivity sensor uses four graphite electrodes in an open cell design to provide extremely accurate and reliable data with very low maintenance. The sensor is used to measure specific conductance, salinity, total dissolved solids...

Stirrer

Stirrer for Hydrolab Sondes for the use with Clark cell

Hach LDO® Dissolved Oxygen Sensor

Since 2002, Hach has established itself as the premier provider of luminescent dissolved oxygen (LDO) technology. Only Hydrolab multiparameter sondes feature Hach LDO technology – designed, manufactured, and supported by Hach in Loveland, Colorado....

OTT Water Quality Buoy

The OTT measuring buoy is specially designed for operation in combination with the HYDROLAB HL7 or HL4 multiparameter sondes. It is equipped with a data acquisition and remote data transmission unit as well as a mains-independent solar power supply....

Water Quality in the Mississippi Basin

A resilient method for monitoring water quality and nitrate levels in the harsh aquatic environment of the Mississippi River, in section 16, was required by the University of Iowa -IIHR. The monitoring of continually accurate water quality data was...

4-Beam Turbidity Sensor (Quanta only)

Hydrolab's 4-Beam Turbidity sensor is compliant with 4B-GLI Method 2

Oxygen Reduction Potential (ORP) Sensor

Hydrolab's ORP sensor uses a platinum band that donates or accepts electrons to monitor chemical reactions, quantify ion activity, or determine the oxidizing or reducing properties of a solution.

ISE Ammonia

ISE Ammonia Sensor for Hydrolab Sondes. ISE is a reference electrode immersed in a solution of fixed ion concentration separated by a membrane containing a chemical compound that reacts with the ion of interest, measuring electrical potential that...

ISE Chloride

ISE Chloride Sensor for Hydrolab Sondes. ISE is a reference electrode immersed in a solution of fixed ion concentration separated by a membrane containing a chemical compound that reacts with the ion of interest, measuring electrical potential that...

ISE Nitrate (Series 5)

ISE Nitrate Sensor for Hydrolab Sondes. ISE is a reference electrode immersed in a solution of fixed ion concentration separated by a membrane containing a chemical compound that reacts with the ion of interest, measuring electrical potential that...

ISE Nitrate

ISE Nitrate Sensor for Hydrolab Sondes. ISE is a reference electrode immersed in a solution of fixed ion concentration separated by a membrane containing a chemical compound that reacts with the ion of interest, measuring electrical potential that...

ISE Chloride (Series 5)

ISE Chloride Sensor for Hydrolab Sondes. ISE is a reference electrode immersed in a solution of fixed ion concentration separated by a membrane containing a chemical compound that reacts with the ion of interest, measuring electrical potential that...

ISE Ammonia (Series 5)

ISE Ammonia Sensor for Hydrolab Sondes. ISE is a reference electrode immersed in a solution of fixed ion concentration separated by a membrane containing a chemical compound that reacts with the ion of interest, measuring electrical potential that...

OTT Hydromet Water Quality Solutions

OTT Hydromet offers water quality monitoring solutions, services and support, from Hydrolab and Sea-Bird Scientific, designed for water quality professionals to obtain the reliable data and measurements they need, all within the...

About Hach Environmental

OTT Hydromet helps water resource professionals generate reliable data throughout the entire environmental water cycle.Our solutions focus around: Water Quality: Hydrolab multiparameter sondes for attended and unattended measurement of...

Service

Leasing Products Hydrolab and OTT product rentals are perfect for short term projects or for testing a product before purchase. Our products can be rented on a weekly or monthly basis. More

Corrtek-Landing-Sonda Multiparametrica Hydrolab

Training

Training workshops are periodically offered around the US and are an excellent opportunity for hands-on instruction with Hydrolab and OTT products from certified professionals.Workshop topics include:     Applications and instrument...

Rentals

Rental instruments are a perfect choice for short-term projects. All rental products are factory calibrated and tested before shipment. Weekly and monthly rates are available and the cost of the rental can be applied toward purchase of a...

Total Dissolved Gas (TDG) Sensor

Hydrolab's Total Dissolved Gas (TDG) sensor uses a pressure transducer mounted behind a rigid gas-permeable membrane to measure amount of total gaseous compounds dissolved in a liquid.

Water Quality Monitoring and Weather Data at Pampulha Lake-Brasil

 In 2010, OTT Hydromet's partner in Brasil,  Hexis began working with CETEC. This resulted in the installation of a buoy, equipped with an automatic profiling system, in early 2013. The project’s objective is the continuous monitoring of the lake’s...