Hanna Instruments HI7004L 4.01 pH Calibration Buffer Solution, 500mL Bottle combination electrode Range: 0-9990 ppm: (0 –

Range: 0-9990 ppm: (0 – 999 ppm the resolution is 1 ppm

plus manual altitude and salinity compensation

The PSC-154 includes a relay switch that activates or deactivates a connected device — such as a pump

A certificate of analysis is available on request

Hanna Instruments HI7004L 4.01 pH Calibration Buffer Solution, 500mL Bottle combination electrode Range: 0-9990 ppm: (0 –This buffer value is widely used in water purification plants, in the food industry, and wherever the pH is expected to be slightly acidic. Traceable to NIST standards Available in bottles or sealed sachets, complete with or without a certificate of analysis. Multiple resolutions for better accuracy. NIST Traceability Standardized using a pH meter calibrated by means of two standard solutions prepared from NIST standard reference materials. Color