Key facts
- Brand
- OHAUS
- Model
- ST20M
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2023-10-16
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OHAUS ST20M Pen pH and Conductivity Meter Instruction Manual
This manual provides instructions for the OHAUS ST20M series of portable electrochemistry pen meters, which measure pH, ORP, conductivity, TDS, and salinity. The ST20M-B and ST20M-C models are factory calibrated but require regular weekly calibration for both pH and conductivity measurements to ensure accuracy.
Read onlineOhaus ST20M specifications
| pH Range | 0.00 – 14.00 pH |
|---|---|
| Conductivity Range (ST20M-B) | 0-1999 μS/cm |
| pH Resolution | 0.01 pH |
| pH Accuracy | ± 0.05 pH |
| Conductivity Accuracy | ± 2% FS |
| Battery | 4 x 1.5V AA |
| Dimensions | 185 x 42 x 37 mm |
| Weight | 105 g |
| Auto-off | After 6 min no operation |
Source: Ohaus ST20M pH and Conductivity Pen Meter User Manual
All Ohaus ST20M documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How often should the ST20M be calibrated?
The ST20M pen meter is factory calibrated but requires calibration every week for both pH and conductivity.
What is the storage requirement for the pH electrode?
The pH electrode should be conditioned by immersing it in pH electrode storage solution (3M KCl solution) for 1 hour before use.
How often should the ST20M be calibrated?
The ST20M pen meter requires calibration every week for both pH and conductivity.
From: OHAUS ST20M Pen pH and Conductivity Meter Instruction Manual
What is the pH accuracy of the ST20M?
The ST20M has a pH accuracy of + 0.05 pH.
From: OHAUS ST20M Pen pH and Conductivity Meter Instruction Manual