Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT - Dual Scale (1.0 to 1.070 S.G.) - Automatic Temperature Compensation auspowers_batchone the buzzer alarm will beep

the buzzer alarm will beep when the value reaches the high/low temp you have set

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Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT - Dual Scale (1.0 to 1.070 S.G.) - Automatic Temperature Compensation auspowers_batchone the buzzer alarm will beepSalinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0 100 PPT Dual Scale (1. 0 to 1. 070 S. G.) Automatic Temperature Compensation Automatic Temperature Compensation Salt Salinity Refractometer Dual Scale 0% 10% & 1. 0 to 1. 070 S. G. Dual Scale Hydrometer. Designed for the safety transportation purpose, the very 1st open of the product case might be tight. Refractometer for seawater, reef aquarium, kitchen use etc. 0 100 ppt : Our