Actichem's Deofresh product page states pH 7
Also effective for allergens
together with the complete Tramex concrete moisture testing system
Picking the wrong one is the most common mistake with this range
Wagner Calibration Verification Block "L' Series Protimeter Actichem's Deofresh product page statesThe Wagner Calibration Verification Block "L' Series is used to verify the calibration of Wagner L Series Hand held Industrial Meters, including the L622, L620, L601 3, and the L722 Lumber Stack Probe, as well as our legacy hand held meters MMC205, MMC210, MMC220, and MMI1100, except for the L609. Wagner Meters handheld units are factory calibrated. With proper care, the meters stay in calibration. If the meter has been dropped or, for any reason, you