After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in a line of pen meters that provide accurate measurement of pH, oxidation-reduction potential (ORP), conductivity, salinity, and total dissolved solids (TDS). Starter pen meters are the economical option when you are simply looking for meters that will provide accurate measurement without restriction.
| Measurement Range | 0.0 – 99.0 °C; 0.00 – 14 pH; 0.00 – 19.99 ms/cm; 0.0 – 10.0 ppt |
|---|---|
| Measurement Resolution | 0.01 pH; 0.01ms/cm; 0.1 ppt; 0.1 °C |
| Calibration | 3 Point |
| Working Environment | 50°F – 104°F, 85%RH, non-condensing |
| Working Environment | 10°C – 40°C, 85%RH, non-condensing |
| Net Weight | 110.0 g (3.88 oz) |
| Meter Type | Conductivity; pH; Salinity |
| Temperature Display | Yes |
| ATC | Yes |
| Dimensions (Width) | 45.0 mm (1.77 in) |
| Automatic Shutdown | Yes, After 6 minutes of non-use |
| Number of Buttons | 3 |
| Wrist Strap | Yes |
| pH accuracy (±) | 0.05 |
| Dimensions (Length) | 38.0 mm (1.5 in) |
| Accuracy | ± 0.05 pH / ± 0.5 °C; ±2.0 % F.S. |
| Temperature Sensor | 50 KO NTC |
| Power | 4 AG13 Batteries (Included) |
| Battery Life | 100 Hours with Disposable Batteries |
| Conductivity accuracy (±) | 2 % |
| Conductivity measuring range | 0.00 – 19.99 mS/cm |
| pH measuring range | 0 |
| Dimensions (Height) | 185.0 mm (7.28 in) |
| Protection Rating | IP67 |
| Meters | ST20M-B | ST20M-C | |
|---|---|---|---|
| Measurement Range | pH | 0 - 14 | |
| Conductivity | 0 … 1999 µS/cm | 0 … 19.99 mS/cm | |
| TDS | 0 … 1000 mg/L | N/A | |
| Salinity | N/A | 0.0–10.0 ppt | |
| Temperature | 0 - 99.0 °C | ||
| Resolution | pH | 0.01 pH | |
| Conductivity | 1µS/cm | 0.01 mS/cm | |
| TDS | 1 mg/L | NA | |
| Salinity | N/A | 0.1 ppt | |
| Temperature | 0.1 °C | ||
| Accuracy | pH | ± 0.05 pH | |
| Conductivity | ± 2 % Full Scale | ||
| TDS | ± 2 % Full Scale | N/A | |
| Salinity | N/A | ± 2 % Full Scale | |
| Temperature | ± 0.5 °C | ||
| ATC | Yes, with temperature display | ||
| ATC Range | 0 - 45 °C | ||
| Calibration | pH | 3 point | |
| Conductivity | 1 point | ||
| TDS | N/A | ||
| Salinity | N/A | ||
| IP Grade | IP67 | ||
| Dimensions | 185 × 45 × 38 mm | ||
| Weight | 110 g | ||
| Batteries | 4 × 1.5V | ||
| Battery Life | 100 hours | ||
| Warranty | 1 year | ||