Salinity Refractometer + temperature.
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Application: To measure seawater (marine aquarium)
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Range: 0-50 PSU - 0 to 150 ppt - 1.000 to 1.114 SG (20/20)
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Resolution: 1 Psu / 1 ppt / 0.001 SG / 0.1 ° C
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Digital calibration with a drop of distilled water (key pres. "Zero)"
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Automatic Temperature Compensation
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Battery: 1 x 9V Alkaline (5000 h of operation)
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Auto close after 3 mn unused