# Hanna Instruments HI98107 pHep pH Tester vs Bluelab pH Pen: specs and price compared

A sourced, side-by-side comparison of the Hanna Instruments HI98107 pHep pH Tester (Hanna Instruments) and Bluelab pH Pen (Bluelab) among ph meters. Hanna Instruments HI98107 pHep pH Tester is the cheaper of the two at $64.99.

## Side by side

| Spec | Hanna Instruments HI98107 pHep pH Tester | Bluelab pH Pen |
| --- | --- | --- |
| US price | $64.99 | $99 |
| Brand | Hanna Instruments | Bluelab |
| Ph range | 0.0 to 14.0 pH | 0.0 to 14.0 |
| Resolution ph | 0.1 pH | 0.1 |
| Accuracy ph | ±0.1 pH at 25°C/77°F (Hanna's own spec table separately lists ±0.2 pH; the narrative accuracy claim ±0.1 pH is used here) | ±0.1 at 25°C/77°F |
| Calibration points | Automatic, 1 or 2-point, using standard buffers 4.01/7.01/10.01 | Two-point (pH 7.0 and pH 4.0 solutions), with a built-in 30-day calibration reminder |
| Atc | Automatic, 0 to 50°C | Yes, fully temperature compensated |
| Electrode type | Cloth-junction pH electrode (larger surface area than a standard ceramic junction) | Double-junction pH probe |
| Waterproof rating | Waterproof; rated to RH 100% max, 0 to 50°C | Waterproof; floats in any solution |
| Battery type | 1 x CR2032 3V lithium, approx. 1000 hours continuous use | 1 x AAA alkaline |

## Key differences

- Ph range: Hanna Instruments HI98107 pHep pH Tester 0.0 to 14.0 pH vs Bluelab pH Pen 0.0 to 14.0
- Resolution ph: Hanna Instruments HI98107 pHep pH Tester 0.1 pH vs Bluelab pH Pen 0.1
- Accuracy ph: Hanna Instruments HI98107 pHep pH Tester ±0.1 pH at 25°C/77°F (Hanna's own spec table separately lists ±0.2 pH; the narrative accuracy claim ±0.1 pH is used here) vs Bluelab pH Pen ±0.1 at 25°C/77°F
- Calibration points: Hanna Instruments HI98107 pHep pH Tester Automatic, 1 or 2-point, using standard buffers 4.01/7.01/10.01 vs Bluelab pH Pen Two-point (pH 7.0 and pH 4.0 solutions), with a built-in 30-day calibration reminder
- Atc: Hanna Instruments HI98107 pHep pH Tester Automatic, 0 to 50°C vs Bluelab pH Pen Yes, fully temperature compensated
- Electrode type: Hanna Instruments HI98107 pHep pH Tester Cloth-junction pH electrode (larger surface area than a standard ceramic junction) vs Bluelab pH Pen Double-junction pH probe
- Waterproof rating: Hanna Instruments HI98107 pHep pH Tester Waterproof; rated to RH 100% max, 0 to 50°C vs Bluelab pH Pen Waterproof; floats in any solution
- Battery type: Hanna Instruments HI98107 pHep pH Tester 1 x CR2032 3V lithium, approx. 1000 hours continuous use vs Bluelab pH Pen 1 x AAA alkaline

## Sources

- Hanna Instruments HI98107 pHep pH Tester: https://www.hannainst.com/hi98107-phep-ph-tester.html (hannainst.com, verified 2026-08-12)
- Bluelab pH Pen: https://www.bluelab.com/products/bluelab-ph-pen (bluelab.com, verified 2026-08-12)

Canonical: https://frontdeskreview.com/gear/ph-meters/hanna-hi98107-vs-bluelab-ph-pen/
Cite: Per The Front Desk Review, Hanna Instruments HI98107 pHep pH Tester ($64.99) vs Bluelab pH Pen ($99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/ph-meters/hanna-hi98107-vs-bluelab-ph-pen/
License: CC BY 4.0.