Extech PH90 Waterproof pH Meter
The Extech PH90 Waterproof pH Meter measures the negative log of hydrogen ion concentration in a water-based solution. The term “pH” was first described by Danish biochemist Søren Peter Lauritz Sørensen in 1909. The H is capitalized because it is standard to capitalize element symbols
pH is a quantitative measure of the acidity or basicity of aqueous or other liquid solutions. The measurement of pH is widely used in chemistry, biology, and agronomy, translates the values of the concentration of the hydrogen ion. A solution with a pH less than 7 is considered acidic; a solution with a pH greater than 7 is considered basic, or alkaline and a pH of 7 is considered neutral.
Extech PH90 Waterproof pH Meter Features:
- Rugged replaceable flat surface pH electrode for quick on-the-spot pH measurements
- Simultaneous display of pH and Temperature
- 2 or 3 point calibration automatically recognizes buffer solutions (order pH buffers separately)
- PTS (percent of slope) tells you when it’s time to replace your electrode (below 70% or above 130%)
- Automatic Temperature Compensation
- Data Hold, Min/Max, Auto Power Off, and low battery indication
- Waterproof design (IP57) floats in water and protects the meter in wet environment
- Complete with flat surface pH electrode, protective sensor cap, and two 3V CR-2032 button batteries
Extech PH90 Waterproof pH Meter Specifications:
| Specifications | Range | Max Resolution | Basic Accuracy |
|---|---|---|---|
| pH | 0 to 14.00pH | 0.01pH | ±(0.01pH + 1d) or ±0.2pH |
| Temperature | 0 to 90°C | 0.1° | (±1°C) |
| Power | Two 3V CR3032 button batteries | ||
| Dimensions | 36 x 170 x 36mm | ||
| Weight | 85g |
