This document is an instruction manual for HI 981404N and HI 981405N pH and TDS/EC monitors, providing information on the features and usage of these instruments.
This manual covers the HI 981404N (pH and TDS) and HI 981405N (pH and EC) combo monitors, which are designed for simple continuous monitoring of water quality. The units feature dual LCD displays and run on a 12 Vdc power supply. They include a pH electrode, a grounding probe, and a conductivity probe (HI 7634 for the TDS model or HI 7632 for the EC model).
| pH Range | 0.0 to 14.0 |
|---|---|
| pH Resolution | 0.1 pH |
| pH Accuracy | +0.2 pH |
| Dimensions | 160 x 110 x 35 mm |
| Weight | 300 g |
| Operating Temperature | 0 to 50°C |
The probes are warranted for a period of six months.
Store the electrode with a few drops of storage solution (HI 70300) or pH 7 solution (HI 7007) in the protective cap.
No, do not use distilled or deionized water for storage purposes.