We are excited to announce new AquaFluor firmware which allows users to calibrate with up to 5 calibration standards providing more accurate estimates than the previous calibration which used a single standard and a blank.  The new firmware also calculates the slope and fit resulting from a linear regression through the calibration points.  The slope is used to convert fluorescence to concentration estimates; fit is a measure of the linear correlation between the standards measured and their respective responses, equivalent to a Pearson Correlation Coefficient.  Concentration units are now shown on the AquaFluor display for each measurement.  Aside from the calibration menu and a few other submenus related to the calibration procedure, AquaFluor functions remain unchanged.

If customers like these changes and want to update older units, we can arrange that service. Please contact sales@turnerdesigns.com if interested in doing this.

All new AquaFluors will include the new firmware.

Posted in AquaFluor Handheld Fluorometer/Turbidimeter | Comments Off

Turner Designs’ Ballast-Check™ 2 is the first biological indicative compliance monitor to receive a Product Design Assessment (PDA) certificate from ABS.  The PDA certifies that the Ballast-Check 2 is fit for purpose as marine specialty equipment.  It was important to Turner Designs that users of the Ballast-Check 2 were provided an assessment conducted by a 3rd party with marine environment experience and knowledge of the ballast water convention and US regulations.   In performing the assessment, ABS examined the Ballast-Check 2 for usability and suitability for use as a rapid compliance measurement tool in marine environments.

To obtain a copy of the PDA:

  • Visit https://ww2.eagle.org/en.html
  • At the bottom of the page – under Search Approved Databases, follow the links for Type Approval.
  • Enter “Ballast Water Analyzer” in the Product Field, click SEARCH NOW

Ballast-Check 2 evaluates the risk of non-compliance for regulation D-2 using estimates of cell counts and cell viability as independent parameters during ballast water analysis.  This evaluation method has been repeatedly proven to give accurate risk assessments for all treatment types, including UV.

Ballast-Check 2 can be used by a ship’s crew before pulling into port providing necessary paperwork to show port state control that the ballast water is managed. Ballast-Check 2’s portability also makes it easy for port state control to bring on board for their own testing. And, when conducting more detailed analysis (i.e., biological performance tests for port state control or type approval), Ballast-Check 2 can be used in parallel to allow the ship’s crew (and testing personnel) to predict or double-check the results of other biological enumeration methods.

Ballast-Check 2 is a small, lightweight, highly durable handheld fluorometer ideal for quick indicative compliance checks of ballast water. Factory-set, Ballast-Check 2 is ready for use right out of the box – no calibration necessary. Extremely simple one-button measurements display estimates in less than 1 minute of both cell counts and cell viability, providing ship crew or port state control with an indication of risk for exceedance of the regulation. Small, battery-powered, water-proof, easy to use, and not requiring the use of any reagents, Ballast-Check 2 is perfect for field use. Ballast-Check 2 is ideal for quick on-the-spot assessments of the effectiveness of a ballast water treatment system.

Turner Designs is partnered with Wilhelmsen Ships Services to provide all ship board application sales and support.

 

Posted in Ballast Water Compliance Monitoring, Ballast-Check 2 Handheld Fluorometer | Tagged , , , , | Comments Off

Congratulations to Keely MacNeil who was awarded a travel stipend for his presentation “N:P as driver of As retention” at the ASLO Summer Meeting 2018 featuring our AquaFluor Handheld Fluorometer.

Abstract
Arsenic (As), a toxic trace element, can be taken into cells in place of phosphorus (P) and decouple phosphorylation, hindering energy production. Organisms take up more As when P is low, and our research shows that microbial As uptake depends on relative nitrogen (N:P), not just P concentration alone. However, the effects on higher trophic levels of increased As uptake resulting from variation in background N:P are unknown. Here, we evaluate if the N:P stoichiometry of a stream and its effects on processes associated with trophic exchanges control the retention and transport of As in geothermal streams, which are naturally rich in As. We measured food web A! s and invertebrate As excretion in three geothermal streams and three c! orresponding non-geothermal streams, all with varying N:Ps. Invertebrate P excretion was greater in As-rich geothermal streams than non-geothermal streams, and As and P excretion were both higher in low N:P (N-limited) streams; both results indicate that invertebrate excretory mechanisms may fail to distinguish between As and P and support our hypothesis that N:P drives As retention and transport in stream food webs.

>>View Presentation

Posted in AquaFluor Handheld Fluorometer/Turbidimeter, Travel Stipend Recipients | Tagged , , | Comments Off

Congratulations to Rebecca Eckert who was awarded a Travel Stipend for her poster presentation at the 2018 SFS Annual Meeting featuring our Trilogy Laboratory Fluorometer.

Abstract
Food webs of temperate, forested headwater streams are energetically supported by leaf debris decomposed by microbes and macroinvertebrate shredders. Recent studies suggest algae may influence leaf decomposition and shredder growth. Thus, leaf-associated algae may correspond to macroinvertebrate communities. We manipulated light in three high and three low nutrient streams in Maryland’s Piedmont in winter 2017. In each stream, five red maple leaf bags were exposed to ambient light and five were shaded; macroinvertebrates and algae were recovered from leaves after four weeks. Algal biomass (chlorophyll-a) was significantly higher under ambient light (p<0.001) and high nutrient conditions (p=0.001). Macroinvertebrate abundance exhibited a significant interaction (p=0.006; lowest abundance: ambient light/low nutrient). Total macroinvertebrate biomass and diversity (Hill numbers) did not vary. Predator and collector-filterer abundance was highest in high nutrient conditions (p=0.009, p=0.039, respectively), and collector-filterer abundance was highest in shade (p=0.002). Ephemerellid abundance increased with light (p<0.001), showed a significant interaction (p=0.007), and was significantly correlated to algal biomass (r=0.417, p=0.001). These results suggest specific macroinvertebrate taxa may shift relative to leaf-associated algae although community level responses may be limited. Stream restoration techniques may improve with the application of leaf-algae-macroinvertebrate relationships.

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The effects on phytoplankton from UV treatment systems is an area of concern as some methods may run into problems when trying to accurately estimate cell counts after UV treatment.  A detailed study by Bradie et al in Journal of Sea Research (2018) explored how well rapid indicative tools can estimate cell counts compared to microscopic analysis for the purpose of estimating phytoplankton cells after UV treatments in actual ballast water samples.  Results using the Ballast-Check 2 showed a very good correlation with microscopic analysis indicating the Ballast-Check 2 does a good job at estimating cell counts in UV treated ballast water samples.

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Posted in Ballast Water Compliance Monitoring, Ballast-Check 2 Handheld Fluorometer | Tagged , , , , | Comments Off

In 2017 the Department of Land and Natural Resources (Division of Aquatic Resources), headed by Julie Kuo, finished testing a Ballast-Check 2 Handheld Fluorometer which is used for rapidly indicating if ballast water is within compliance levels set by D2 discharge standards. Results showed that the Ballast-Check 2, optimized for lower phytoplankton concentrations typically associated with ballast water, can rapidly and reliably measure 10-50 micron sized phytoplankton helping authorities quickly decide how to proceed with managing de-ballasting events for ships at port.

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Posted in Ballast Water Compliance Monitoring, Ballast-Check 2 Handheld Fluorometer | Tagged , , , | Comments Off

Turner Designs recently developed new data reporting software which ensures data integrity as requested by Saudi Aramco.  The new software writes Ballast-Check™ 2 results directly to a PDF report which cannot be altered.  Saudi Aramco is now able to ramp up their use of indicative compliance tools for collecting data from arriving ships. This data reporting software is included with all new Ballast-Check 2s and is available as a download for previously purchased units.

Ballast-Check 2 evaluates RISK of non-compliance for the D2 regulation using estimates of cell counts and cell viability as independent parameters during ballast water analysis.  This evaluation method has been repeatedly proven to give accurate risk assessments for all treatment types, including UV.

Ballast-Check 2 is a small, lightweight, highly durable handheld fluorometer ideal for quick indicative compliance checks of ballast water. Factory-set, Ballast-Check 2 is ready for use right out of the box, no calibration necessary. Extremely simple one-button measurements display estimates in less than 1 minute of both algal abundance and algal activity, providing ship crew or port state control with an indication of risk for exceedance of the regulation. Small, battery-powered, water-proof, and easy to use, Ballast-Check 2 is perfect for field use. Ballast-Check 2 is ideal for quick on-the-spot assessments of the effectiveness of a ballast water treatment system.

Posted in Ballast Water Compliance Monitoring, Ballast-Check 2 Handheld Fluorometer | Tagged , , , , | Comments Off

Turner Designs’ Databank Handheld Datalogger is upgraded to include an internal GPS chipset allowing users to log GPS coordinates along with measurement data for location tracking.  Using GPS & GLONASS Global Navigation Satellite System, DataBank provides horizontal position accuracy of 2.5 meters.  DataBank stores up to 9,999 records as well as 16 calibrations and uses an intuitive GUI interface for configuring and calibrating Cyclops sensors; logged data are downloaded via USB.  DataBank’s internal rechargeable battery provides continuous measurements up to 15 hours or continuous GPS data collection up to 5 hours.

Databank comes with one factory-installed cable that supplies power to and communicates with Turner Designs’ Cyclops sensors.  Standard Cyclops sensors are available for detecting: in vivo Chlorophyll, Crude Oil, Refined Fuels, CDOM/FDOM (dissolved organic material), Blue/Green Algae, Fluorescein Dye, Rhodamine Dye, PTSA Dye, Optical Brighteners, Tryptophan, and Turbidity.  Cyclops sensors can also be configured with custom optics for specialized applications per customer request.

Integrated GPS data are important for field work such as conducting dye trace studies, mapping algal blooms, or looking for the presence of optical brighteners as an indicator of wastewater contamination.  Small and lightweight, DataBank is ideal for such remote field work.

Posted in Cyclops Submersible Sensors, DataBank Datalogger | Tagged , , , | Comments Off

Following detailed scientific and technical evaluation by the Environmental Protection Department of Saudi Aramco, the Turner Designs’ Ballast-Check 2 Handheld PAM Fluorometer (USA) is approved as a valid Ballast Water Sampling Instrument.  Saudi Aramco will now accept results from certified technicians using Turner Designs Ballast-Check 2 Handheld PAM Fluorometer in addition to the other previously approved instrumentation.   Saudi Aramco announced in August that all ships calling at its ports and terminals are required to provide ballast water test results to show compliance with the IMO BWM 2004 convention.  It has been a challenge to sample all the arriving ships and Saudi Aramco looks forward to having additional certified technicians and instrumentation performing the tests.

Ballast-Check 2 is a small, lightweight, highly durable handheld fluorometer ideal for quick indicative compliance checks of ballast water. Factory set, Ballast-Check 2 is ready for use right out of the box, no calibration necessary. Extremely simple one-button measurements display estimates in less than 1 minute of both algal abundance and algal activity, providing ship crew or port state control with an indication of risk for exceedance of the regulation. Small, battery-powered, water-proof, and easy to use, Ballast-Check 2 is perfect for field use. Ballast-Check 2 is ideal for quick on-the-spot assessments of the effectiveness of a Ballast Water Treatment System.

Turner Designs is working closely with several service providers to train and certify them to support Saudi Aramco as more are needed.  Turner Designs is partnered with Wilhelmsen Ships Services to provide worldwide sales and support of Ballast-Check 2 to ship owners and operators.

Posted in Ballast Water Compliance Monitoring, Ballast-Check 2 Handheld Fluorometer | Tagged , , | Comments Off

Environmental conditions are changing leading to significant shifts in algal populations. An example of this is the noticeable worldwide increase in Harmful Algal Blooms, primarily cyanobacteria. Identifying algal groups within a total phytoplankton population is critical as some groups can be toxic, affecting public health and economies. Turner Designs is excited to introduce products facilitating increased understanding of the composition of algae populations.

PhytoFind provides in situ algal classification distinguishing among algal groups using specific fluorescence signatures. Real-time abundance estimates are calculated for PE-containing algae (mixed group), PC-containing algae (Cyanophyceae), and total algae (all other algal groups). Calculations include an automatic correction for interference from dissolved organic materials (DOM) providing more accurate real-time estimates. Optics are optimized to minimize interference from turbidity.  Abundances are displayed and logged as group percentages along with temperature, depth, and accurate chlorophyll (µg/L) concentrations.

PhytoFind’s durable Delrin housing is highly resistant to harsh environments. Additional antifouling materials such as wipers and copper plates can be included to minimize biofouling for long term deployments.  If deploying long-term, a high capacity external submersible battery with an estimated maximum deployment time of three months is available.  All PhytoFinds have a large capacity for internal memory storage (over 60,000 data lines).

PhytoFind is factory-calibrated; no calibration standards or tools are required.  Solid state optoelectronics ensure long term instrument stability.  Solid reference standards are available for users wanting to confirm stability in the calibration.

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