The OPT-228 pH meter is an easy to use handheld device for measuring pH, mV and °C. With the OPT-228 pH meter, both temperature and pH values can be directly stored onto a SD card (in Excel format), or transferred to a PC through an RS-232 interface. An optional software and data cable for the OPT-228 pH meter are available as optional accessories to transfer data to a computer.Temperature compensation in the OPT-228 pH meter can be done manually or automatically by way of the temperature sensor which is included. The pH meter has two calibration points. The calibration can be done with the trimmer on the side of the device which is protected under a cover. With this combined device, the user can determine pH value, temperature or Redox potency (ORP). For the latter measurement parameter, a Redox electrode must be ordered separately from the OPT-228 pH meter. We recommend the ORP-14 electrode. The pH meter is powered by a 9V battery which is included..
Features:- Good price-performance ratio- SD memory card (up to16 GB)- Measured values are directly saved in the SD card as an Excel file- RS-232 interface for real time data transference- Measures pH values, Redox, conductivity, salt content, oxygen and temperature- High accuracy- Low battery indication- Large LCD display- Adjustment of the measurement rate- Easy-to-use- Solid enclosure- Includes pH PE 03 electrode and a noble steel temperature sensor- Automatic calibration- Manual or automatic temperature compensation- BNC connector- Suitable for measurements in laboratories and on site- Optional Redox electrode Technical Specification:
| Measurement range | 0.00 to 14.00 pH |
| -1,999 to 0 to 1,999 mV (only with the optional Redox electrode) |
|
| 0.0...65.0 °C (only the temperature sensor) | |
| Resolution | 0.01 pH |
| 1 mV | |
| 0.1°C | |
| Accuracy (at 20°C) | ± (0.02 pH + 2 digits) |
| ± (0.5 % + 2 digits) | |
| ±0.5°C | |
| Calibration | Automatic three-point calibration |
| Temperature compensation | automatic from 0 to 65°C or manual between 0 and 100°C removing the temperature sensor |
| Electrode | pH PE-03 electrode, 1 meter cable and BNC plug temperature range: 0 ... 60 ºC |
| Measurement rate | adjustable from 1 second up to 8 hours 59 min 59 sec |
| Display | LCD display: 52 x 38 mm |
| Memory | SD card from 1 ... 16 GB (2 GB memory card included) |
| Interface | RS-232 |
| Software | optional |
| Power supply | 6 x 1.5 V AA batteries / mains adapter 9 V (optional) |
| Operating conditions | 0 to 50°C max. 80% r.h. |
| Dimensions | 177 x 68 x 45 mm |
| Weight | 490 g |
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