10 × MA90007 — pH 7

Low battery warning

Compact Design - 2

Temp Range: -5 to 70°C

No unpleasant tastes

GroLine pH 4.01 Calibration Buffer (230 mL) winemaking pH meter 10 × MA90007 — pHHI7004 023 is a high quality pH 4. 01 calibration buffer that is NIST traceable and supplied with a Certificate of Analysis. Hanna calibration buffers have the lot number and expiration date clearly marked on the label and are air tight with a tamper proof seal to ensure the quality of the solution. Hanna's line of technical calibration buffers have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened