The Extech PH90 is a rugged, waterproof (IP57-rated) pH meter designed for reliable on-the-spot measurements in liquids, semi-solids, and solid surfaces. It features a durable, replaceable flat surface pH electrode that resists breakage and clogging—unlike traditional glass bulb sensors—making it ideal for field, agricultural, industrial, and laboratory use. The meter simultaneously displays pH and temperature with Automatic Temperature Compensation (ATC), supports 2- or 3-point calibration with automatic buffer recognition, and includes a Percent of Slope (PTS) indicator to alert users when electrode replacement is needed. Its compact, floating design and long-life button batteries ensure dependable performance in wet or harsh environments.
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| pH Range | 0.00 to 14.00 pH |
| pH Resolution | 0.01 pH |
| pH Accuracy | ±(0.01 pH + 1 digit) or ±0.2 pH |
| Temperature Range | 32 to 194°F (0 to 90°C) |
| Temperature Resolution | 0.1°F / 0.1°C |
| Temperature Accuracy | ±1.8°F (±1°C) |
| Calibration | 2- or 3-point, auto buffer recognition |
| Electrode Type | Flat surface (replaceable, model PH95) |
| Housing Rating | IP57 (waterproof) |
| Power Supply | 2 x 3V CR2032 button batteries (included) |
| Dimensions | 6.7 x 1.4 x 1.4" (170 x 36 x 36 mm) |
| Weight | 3 oz (85 g) |
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The Extech PH90 is a rugged, waterproof (IP57-rated) pH meter designed for reliable on-the-spot measurements in liquids, semi-solids, and solid surfaces. It features a durable, replaceable flat surface pH electrode that resists breakage and clogging—unlike traditional glass bulb sensors—making it ideal for field, agricultural, industrial, and laboratory use. The meter simultaneously displays pH and temperature with Automatic Temperature Compensation (ATC), supports 2- or 3-point calibration with automatic buffer recognition, and includes a Percent of Slope (PTS) indicator to alert users when electrode replacement is needed. Its compact, floating design and long-life button batteries ensure dependable performance in wet or harsh environments.
|
|
|
|---|---|
| pH Range | 0.00 to 14.00 pH |
| pH Resolution | 0.01 pH |
| pH Accuracy | ±(0.01 pH + 1 digit) or ±0.2 pH |
| Temperature Range | 32 to 194°F (0 to 90°C) |
| Temperature Resolution | 0.1°F / 0.1°C |
| Temperature Accuracy | ±1.8°F (±1°C) |
| Calibration | 2- or 3-point, auto buffer recognition |
| Electrode Type | Flat surface (replaceable, model PH95) |
| Housing Rating | IP57 (waterproof) |
| Power Supply | 2 x 3V CR2032 button batteries (included) |
| Dimensions | 6.7 x 1.4 x 1.4" (170 x 36 x 36 mm) |
| Weight | 3 oz (85 g) |