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Accessories Pumps Powerheads Chemicals Deionization Filters Specialty Filters Media Reactor Skimmer CO2 Filter Fittings Housings & Brackets Meters & Controllers RO Membranes RO Systems RO/DI Systems Storage Tanks Tubing Refractometers

BFS-447 Salinity Refractometer - $38.99 Dual scale aluminum Salinity Refractometer. Measures the salinity of sea water and saline solutions of similar concentration. The scales in the viewfinder show salinity levels from 0-100 ppt with 1 ppt scale divisions; and Specific Gravity from 1.000 to 1.070 ( /- 0.001 accuracy). Includes automatic temperature compensation between 50 and 86 degrees F. Includes a pipette for dropping test fluids onto the prism, a mini screwdriver for scale calibration, cotton wiping cloth and User’s Guide – all in a protective, cushioned carrying case. BFS-448 VeeGee STX-3 Salinity Refractometer - $98.79 The STX-3 from VEE GEE is simple to operate and provides quick, precise measurements.The STX-3 features the largest, easiest-to-read scale available with exceptionally clear, sharp figures, screen shading and incredible contrast. If you've ever used a lower cost refractometer, you'll notice the difference immediately. With an automatic temperature range of 50 to 86 F, the STX-3 can be used in outdoor environments without the need to re-zero. Calibrating the STX-3 is very simple with the “Zero Ring.” The rugged construction of the STX-3 will provide years of reliable use. The optical glass prism is mounted in an all-metal housing which allows the sample and prism to reach temperature equilibrium quickly. The non-roll stand ensures that once the STX-3 is placed on a table or bench top, it won’t be prone to roll off the surface. Comes with carrying case and pipette. BFS-528 Refractometer Calibration Fluid - $6.89 2 oz. container with dropper. Ideal for testing salinity and specific gravity in salt water. Made in the USA.

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