TDS Meters
A151 Laboratory Conductivity/TDS/Salinity/Resistivity Meter
High-precision TDS meter contains 4 measurement modes, the meter is suitable for measuring conductivity, total dissolved solids, salinity and resistivity, accuracy: 1% F.S.
Features:
• 1 to 3 points calibration with automatic recognition for standard solutions.
• Selectable cell constant, reference temperature, TDS conversion factor, linear/non-linear/pure
water compensations, percentage/seawater/practical salinity measurement modes.
• Automatic temperature compensation corrects measurements to the reference temperature.
• Auto-read function senses and locks the measurement endpoint.
• Timed interval readings send the measurement data to a PC or printer.
• Limit Alarm automatically alerts when reading exceeds the specified range.
• Calibration due alarm reminds the user to calibrate the meter regularly.
• Calibration log shows the date, time, calibration point and factor.
• Password protection prevents the unauthorized calibration and settings.
• Expanded memory stores or recalls up to 1000 data sets.
• Reset function automatically resumes all settings back to the factory defaults.
Model | A151 | |
Conductivity | ||
Range | 0 to 20.00, 200.0, 2000 µS/cm, 20.00, 200.0 mS/cm | |
Resolution | 0.001, 0.01, 0.1, 1, automatic | |
Accuracy | ±0.5% F.S. | |
Calibration | 1 to 3 points | |
Calibration Solutions | 10 µS / 84 µS / 1413 µS / 12.88 mS / 111.8 mS | |
TDS | ||
Range |
| 0 to 10.00, 100.0, 1000 mg/L, 10.00, 200.0 g/L |
Resolution |
| 0.01, 0.1, 1, automatic |
Accuracy |
| ±1% F.S. |
TDS Conversion Factor |
| 0.1 to 1.0 (default 0.5) |
Salinity | ||
Range |
| 0.00 to 80.00 ppt / 0.00 to 42.00 psu / 0.00 to 8.00% |
Resolution |
| 0.01 |
Accuracy |
| ±1% F.S. |
Resistivity | ||
Range |
| 0.00 to 30.00 MΩ |
Resolution |
| 0.01, 0.1, 1, automatic |
Accuracy |
| ±1% F.S. |
Temperature | ||
Range | 0 to 105°C / 32 to 221°F | |
Resolution | 0.1°C/°F | |
Accuracy | ±0.5°C / ±0.9°F | |
Calibration | 1 point | |
Calibration Range | Reading ±10°C/°F | |
Other Specifications | ||
Temperature Compensation | 0 to 100°C / 32 to 212°F, manual or automatic | |
Temperature Coefficient |
| Linear (0.0 to 10.0%/°C) / Non-linear / Pure water |
Reference Temperature |
| 20 / 25°C |
Cell Constant |
| 2-pole electrodes (K=0.1 / 1 / 10) or 4-pole electrode |
Stability Criteria |
| Standard / High-accuracy |
Measurement Modes |
| Continuous / Auto-read measurement endpoint |
Timed Interval Readings |
| 10 / 30 / 60 seconds, 10 / 30 minutes or off |
Calibration Due Alarm |
| 1 to 31 days or off |
High/Low Limit Alarm |
| Selectable |
Password Protection |
| 4 digits |
Memory |
| Stores up to 1000 data sets |
Output |
| USB communication interface |
Connector |
| 6-pin mini-DIN, 3.5 mm jack socket |
Display |
| 7 inch TFT LCD |
Power Supply |
| 12V DC power adapter |
Environmental Conditions |
| 0 to 50°C / 32 to 122°F, relative humidity < 80% |
Dimensions | 240 × 220 × 80 mm | |
Weight | 1.7 kg |
Ordering Code | Meter Includes |
A151-S | CON-1 conductivity electrode |
TP-10K temperature probe | |
Conductivity standard solutions 84 µS/cm, 1413 µS/cm, 12.88 mS/cm | |
12V DC power adapter | |
A151-DL | CON-0.1 conductivity electrode |
CON-1 conductivity electrode | |
TP-10K temperature probe | |
Conductivity standard solutions 84 µS/cm, 1413 µS/cm, 12.88 mS/cm | |
12V DC power adapter | |
A151-DH | CON-1 conductivity electrode |
CON-10 conductivity electrode | |
TP-10K temperature probe | |
Conductivity standard solutions 1413 µS/cm, 12.88 mS/cm, 111.8 mS/cm | |
12V DC power adapter |
| Items | Description |
| CON-0.1 Conductivity Electrode | For measuring the pure water |
| CON-1 Conductivity Electrode | For measuring the general water samples |
| CON-10 Conductivity Electrode | For measuring the high conductivity samples |
| TP-10K Temperature Probe | For temperature compensation and measurement |
| Conductivity Standard Solutions | For conductivity calibration |
| USB Cable | For transferring data or connecting power adapter |
| Thermal Printer | For printing the measurement data |
Ordering Code | Dimensions and Weights |
A151-S | 30 × 25 × 20 cm, 2 kg |
A151-DL | 30 × 25 × 20 cm, 2 kg |
A151-DH | 30 × 25 × 20 cm, 2 kg |
