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Mode of action: Opal acts in two ways: (1) suffocation and disruption of the structure and permeability of insect cell membranes
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and automatic calibration
Hanna Groline pH / EC / TDS Waterproof Portable Meter - HI9814 beneficial we would be pleased toThe HI9814 is a slim, lightweight, and waterproof portable meter that measures pH, conductivity (EC), total dissolved solids (TDS) and temperature with a single amplified probe. The meter operation is simplified with two buttons. One is used for on off and for calibration while the other is used to switch between the measurement modes. The HI9814 has advanced features including an selectable EC to TDS conversion factor (0. 5 500 ppm and 0. 7 700 ppm).
