Serial Driver for Orion 290A+ pH Meter
The Thermo Orion 290A+ is a discontinued pH meter originally sold by Thermo Scientific. It has an RS-232 serial interface which when connected with a Null Modem adapter and USB to Serial adapter allows data logging on a computer. See Jupyter Notebook for example usage.
Thermo product page:
https://www.coleparmer.com/i/thermo-scientific-0290a0-ph-mv-relative-mv-concentration-temperature-meter-model-290a/5880400
Orion 290A+ Specifications:
| Specifications | Description |
|---|---|
| Display type | LCD |
| Min pH (pH) | -2 |
| Max pH (pH) | 19.99 |
| pH Resolution | 0.001/0.01/0.1 |
| pH Accuracy | ±0.005 pH |
| Buffer Recognition | DIN, NIST, and USA |
| Min mV (mV) | -1600 |
| Max mV (mV) | 1600 |
| mV Resolution | 0.1 mV |
| mV Accuracy | ±0.2 mV or 0.05%, whichever is greater |
| Battery | 1 x 9 V battery (included) |
| Width (cm) | 8.255 |
| Height (cm) | 19.3675 |
| Width (in) | 3 1/4 |
| Length (in) | 1 |
| Height (in) | 7 |