HA7405 is an Ammonia based hardness buffer that will detect hardness as low as 0.2 or 0.3 ppm. HA7407 is a Triethanolamine based odorless hardness buffer with a sensitivity of 1.0ppm or higher.
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HA7405 is an Ammonia based hardness buffer that will detect hardness as low as 0.2 or 0.3 ppm. HA7407 is a Triethanolamine based odorless hardness buffer with a sensitivity of 1.0ppm or higher.