Hanna HI98127 4 pHEP Digital pH and Temperature 0-14pH Waterproof ATC Pocket pH Tester UV Bulbs •Replace every 2 months

•Replace every 2 months

This is a simplified definition as the measurement is affected by many things such as the type of ionic compound(s) dissolved in the water

it is reasonable to specify at least MERV 11 filters to maintain good indoor air quality in common types of spaces

WHEERM has been certified and tested against NSF/ANSI standard 58 for the reduction of total dissolved solids and organic matter

The post-filter now has an orange tip

Hanna HI98127 4 pHEP Digital pH and Temperature 0-14pH Waterproof ATC Pocket pH Tester UV Bulbs •Replace every 2 monthsThe Hanna HI98127 pHep4 lightweight and sleek tester is accurate to 0. 1 pH with a built in thermometer to automatically adjust the pH reading for temperature. The waterproof design (it floats), simple operation, and replaceable electrode mean that you can rely on this meter for years. The large LCD display shows both pH and temperature readings simultaneously, while a stability indicator is displayed to alert you when a stable reading has been