This document is an instruction manual for the HI 981402 online waterproof pH meter with alarm. The manual provides information on the warranty, usage instructions, maintenance requirements, and contact information for the product.
The Hanna Instruments HI 981402 is an on-line, waterproof pH meter designed for simple continuous monitoring of pH levels. It features a completely sealed housing with an IP54 rating to protect against vapors and humidity, allowing it to be hung directly above the sample being tested. The unit includes a selectable setpoint that triggers a flashing LED alarm when the measured value deviates from the target range.
| Range | 0.0 to 14.0 pH |
|---|---|
| Resolution | 0.1 pH |
| IP Rating | IP54 |
| Power Supply | 12 Vdc adapter (included) |
| Dimensions | 86 x 110 x 43 mm |
The instrument is warranted for two years against defects in workmanship and materials when used as intended.
The red alarm LED will blink to alert the user that the pH has varied more than 0.5 pH from the setpoint.
No, you should not use distilled or deionized water for storage purposes.