| Salinity Measurement Modes |
Practical salinity (psu) or natural sea water (ppt) |
| Range (Resistivity) |
2 ohm to 100.0 meg-ohm |
| Memory |
Non-volatile memory preserves data log, calibration log and meter settings |
| Languages |
English, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update |
| Measurement Modes |
pH,mV,Relative mV,TDS,ORP with Temperature,Salinity,Conductivity,Resistivity with Temperature |
| Power Supply |
4 AA batteries (included) or universal AC adapter (sold separately) |
| Data Management Details |
Transfer single, range or all data points to printer or computer |
| Battery Life |
800 hr. |
| Display Type |
LCD Graphic, Backlit |
| Resolution (mV) |
0.1mV |
| Data Points |
5000 with Date and Time Stamp |
| Temperature Probe Calibration |
1 point temperature offset calibration |
| Certifications/Compliance |
CE, TUV 3-1, FCC Class A |
| Accuracy (mV) |
±0.2 mV or ±0.05% of reading whichever is greater |
| Warranty |
3 Year Meter |
| Temperature Accuracy |
±0.1°C |
| Stability |
Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting |
| Resolution (Conductivity) |
0.001 μS minimum, auto ranging up to 4 significant digits |
| Range (Conductivity) |
0.001 μS/cm to 3000 mS/cm |
| Log Function Type |
Automatic data logging with Auto-Read and Timed measure modes; manual data logging with Continuous m |
| Battery Type |
4 AA (included) |
| Relative Humidity Range |
5 to 85 %, non-condensing |
| Dimensions (L x W x H) |
24cm x 10cm x 6.5cm (9.5 in. x 3.9 in. x 2.6 in.) |
| Accuracy (TDS) |
0.5% of reading ±1 digit |
| Temperature Selection |
Manual or automatic with ATC temperature probe |
| Keypad |
Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys |
| Outputs |
USB, RS232 |
| Temperature Range (English) |
22.0°F to 221.0° F |
| Range (Relative mV) |
±2000.0 mV |
| Calibration Points (pH) |
1 to 5 |
| Backlight Option |
Yes (Selectable) |
| Range (mV) |
±2000.0 mV |
| Range (ORP) |
±2000.0 mV |
| Methods |
10 per channel with password protection |
| Cell Constant |
0.001 to 199.9cm-1 |
| Temperature (Metric) Reference |
5, 10, 15, 20, 25°C |
| Range (pH) |
-2 to 20 |
| TDS Factor Range |
Linear (0.02 to 9.99) |
| Channels |
2 |
| Accuracy (pH) |
±0.002 |
| Range (Salinity) |
0.06 to 80.00 psu, 0.05 to 42.00 ppt |
| Temperature Compensation |
Linear, nLFn (non-linear ultra pure water), nLFu (non-linear ultra pure degassed water), EP (off with warning) or off |
| Accuracy (Salinity) |
0.5% of reading ±1 digit |
| Resolution (Salinity) |
0.01 psu or 0.01 ppt minimum, auto ranging |
| Accuracy (Conductivity) |
0.5% of reading ±1 digit > 3 μS; 0.5% of reading ±0.01 μS ≤ 3 μS |
| Inputs |
BNC (pH or ORP electrode), pin-tip (reference electrode), 8 pin MiniDIN (conductivity sensor with built-in temperature or ATC temperature probe) |
| Weight (Metric) |
0.5 kg |
| Calibration Points (Conductivity) |
Up to 5 |
| Temperature (English) Operating |
41°F to 113°F (ambient) |
| Resolution (Resistivity) |
1 ohm or 0.1 meg-ohm, auto ranging |
| Isopotential Point |
7.000pH |
| Accuracy (Resistivity) |
0.5% of reading ±1 digit |
| AC Adapter |
Universal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003) |
| Range (TDS) |
0.001 ppm to 200.0 ppt |
| Resolution (TDS) |
0.001 ppm minimum, auto ranging up to 4 significant digits |
| Calibration |
pH with calibration editing option, relative mV (RmV), ORP, conductivity with calibration editing op |
| Calibration Points |
1 point relative mV (RmV) mode, 1 point ORP mode |
| Alarm Output |
High/low limit alarm, calibration due alarm |
| IP Rating |
IP67 |
| Model |
Orion Star A325 pH/mV/RmV/ORP/Conductivity/TDS/Salinity/Resistivity/Temperature Portable Meter |
| Weight (English) |
1.2 lb. |
| Temperature (Metric) Operating |
5°C to 45°C (ambient) |
| Temperature Range (Metric) |
-5.0°C to +105.0°C |
| Temperature Resolution |
0.1°C, 0.1°F |