Salinity Refractometer

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Does anyone know where I can get a low cost of salinity refractometer?

Portable Refractometer supports Smith & 1 on sale for $ 41.99 + S & H $ 9.99 = $ 51.98 I wonder what some other trusted sites that sell em cheaper thankx

http://cgi.ebay.ca/Salinity-Refractometer-ATC-for-Aquarium-Salt-Water_W0QQitemZ180354247150QQcmdZViewItem http://cgi.ebay http://cgi.ebay.com/Salinity-Refractometer-Hydrometer-Refraktometer-Ocean_W0QQitemZ370221708518QQcmdZViewItem. ca/Salinity-Refractometer-ATC-for-Aquarium- (Heavy Duty) _W0QQitemZ180354247596QQcmdZViewItem

Extech RF20 0 Parts per Thousand to 100 Parts per Thousand Automatic Temperature Compensation Salinity Refractometer $63.99 Salinity refractometer measures the concentration of dissolved salt in water --- Includes: (1) Carrying Case; (1) Calibration screwdriver...

Sybon Refractometer with Automatic Temperature Compensation $49.99 For the most precise measurement of salinity, the experts use a Refractometer. This high-tech instrument is used to measure salinity when perfect conditions are needed for breeding, or keeping very delicate corals. This easy-to-use and read device will allow you to keep track of your tank's salinity fluctuations. This instrument also features ATC, automatic temperature compensation that will allow...

Hanna Instruments HI 96822 Refractometer for Measuring Salinity of Natural and Artificial Seawater $176.67 ###############################################################################################################################################################################################################################################################...

Extech RF12 Portable Brix Refractometer (0 to 18%) with Automatic Temperature Compensation $99.99 Extech RF12 Portable Brix Refractometer (0 to 18%) with ATC...

Extech RF41 Portable Battery Coolant/Glycol Refractometer with Automatic Temperature Compensation (°C) $79.99 Extech RF41 Portable Battery Coolant/Glycol Refractometer with ATC (?C) Measures the freezing point of coolants and concentration of Ethylene/Propylene Glycol...

General Brix Refractometer 28 To 62% With Atc $35.99 Features:Metal body Rubber hand grip blocks hand heat Calibration screen Cushioned rubber eyepiece Non-roll stand Prism mounted in high impact plastic Specifications:Range: 28 to 62% Resolution: 0.2% NOTE: We will not pay for the shipping fee of a replacement if the item is defective....

Milwaukee Instruments MR100 Salinity Refractometer, Range: 0-100 SALINITY, 1.000-1.070 SG $137.70 SALINITY REFRACTOMETER FOR SEA WATER DENSITY. RANGE: 0-100 SALINITY, 1.000-1.070 (SPECIFIC GRAVITY), RESOLUTION 1 SALINITY, 0.001 (SPECIFIC GRAVITY)...

Milwaukee Instruments MR100ATC Salinity Refractometer, Range: 0-100 Salinity, 1.000-1.070 SG $153.90 SALINITY REFRACTOMETER FOR SEA WATER DENSITY WITH ATC. RANGE: 0-100 SALINITY, 1.000-1.070 (SPECIFIC GRAVITY), RESOLUTION 1...

Milwaukee Instruments MR128 Salinity Refractometer for High Concentration, Range 0-28% $137.70 SALINITY REFRACTOMETER FOR HIGH CONCENTRATION. RANGE 0-28%, RESOLUTION 0.2%....