Would not calibrate properly. Got a replacement and it also would not calibrate properly. Took it to a friend that was very familiar with refractometers and the problem seemed to lie with the alignment of the prism in such a way that the cover lens could not lie flat on the prism. Returned and requested a refund and ordered ebay’s choice refractometer and it calibrates and works fine. I suspect the first two I got that would not calibrate properly were from the same batch and most must work fine according to the number of positive reviews.
📊 PH 1-14 Extensive Storage Testing Monitoring: Optimize Your Storage with Precise pH Level Monitoring
6 Отзывов
Цифровой тестер pH-метра - тестер качества воды Tiaoyeer с ATC, высокой точностью 0,01PH, диапазоном измерения 0,00-14,00, разрешением 0,01 для питьевой воды, аквариума, плавательных бассейнов, гидропоники
8 Отзывов
Лакмусовые полоски для анализа воды 80 штук, лакмусовая ph бумага, измеритель кислотности почвы, жидкости, pH-тестер 1-14
10 Отзывов
💧 Enhanced Water Analysis: HM Digital HydroTester Offers Unparalleled Resolution and Accuracy
6 Отзывов