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too long or too short may affect the reading
the higher the salt content
nitrate carbonate and general water hardness in freshwater and saltwater aquariums
sewage treatment
DR300 Pocket Colorimeter, Chlorine & pH Glosso Factory too long or too shortBrand: Hach Company Features: Single Parameter go anywhere portable photometer Battery operation for a maximum of 5000 tests Waterproof instrument IP67 (even better than PCII) Data connectivity DR300 Pocket Colorimeters are NOT sold with chemical reagents. Reagents must be purchased separately. model number: LPV445. 97. 12110 Part Number: LPV445. 97. 12110 Details: The DR300 maintains the Pocket Colorimeter legacy of reliability while providing state
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