| pH Range |
pH: -2.000 to 16.000, -2.00 to 16.00 ±1000 mV |
| pH Resolution |
0.001 pH, 0.01 pH 0.1 mV |
| pH Accuracy (@25°C/77°F) |
±0.01 pH, ±0.002 pH ±0.2 mV |
| pH Calibration |
Automatic, up to 3 points (5 points*) calibration, 5 standard (7 standard*) buffers available (1.68*, 4.01 or 3.00, 6.86, 7.01, 9.18, 10.01, 12.45*) and 2 custom buffers* |
| pH Temperature Compensation |
Automatic -5 to 100˚ C (23 to 212˚ F) (using integral temperature sensor) |
| EC Range |
0.00 to 29.99 μS/cm, 3.00 to 29.99 μS/cm, 30.0 to 299.9 μS/cm, 300 to 2999 μS/cm, 3.00 to 29.99 mS/cm, 30.0 to 200.0 mS/cm, up to 500.0 mS/cm |
| EC Resolution |
0.01 μS/cm, 00.1 μS/cm, 0.01 μS/cm, 0.01 mS/cm, 00.1 mS/cm |
| EC Accuracy |
±1% of reading (±0.05 μS/cm or 1 digit, whichever is greater) |
| EC Calibration |
1 Cell Factor calibration 6 standards available: 84, 1413 μS/cm, 5.00, 12.88, 80.0, 111.8 mS/cm, 1 point offset: 0.00 μS/cm |
| TDS Range |
0.00 to 14.99 ppm (mg/L), 15.0 to 149.9 ppm (mg/L), 150. to 1499. ppm (mg/L), 1.50 to 14.99 g/L, 15.0 to 100.0 g/L, up to 400.0 g/L absolute TDS ‡ (with 0.80 factor) |
| TDS Resolution |
0.01 ppm, 0.1 ppm, 1 ppm, 0.01 g/L, 0.1 g/L |
| TDS Accuracy |
±1% of reading (±0.03 ppm or 1 digit, whichever is greater) |
| TDS Calibration |
through EC calibration |
| EC/TDS Temperature Compensation |
Automatic -5 to 100 ºC (23 to 212 ºF) NoTC – can be selected to measure absolute conductivity. |
| Temperature Correction Coefficient |
0.00 to 6.00% / ºC (for EC and TDS only). Default value is 1.90% / ºC |
| EC to TDS Conversion Factor |
0.40 to 0.80 (default value is 0.50) |
| Salinity Range |
0.0 to 400.0% NaCl, 0.01 to 42.00 PSU, 0.0 to 80.0 g/L* |
| Salinity Resolution |
0.1% NaCl, 0.01 PSU, 0.01 g/L |
| Salinity Accuracy |
±1% of reading |
| Salinity Calibration |
1 point with HI 7037L 100% NaCl sea water standard (other scales through EC calibration) |
| Salinity Temperature Compensation |
0 to 40 g/L (with 1 g/L resolution) |
| Sodium Chloride Range |
0.0 to 400.0% NaCl |
| Sodium Chloride Resolution |
0.1% NaCl |
| Sodium Chloride Accuracy |
±1% of reading |
| Sodium Chloride Calibration |
1 point with HI 7037L 100% NaCl sea water standard (other scales through EC calibration) |
| DO Range |
0.00 to 45.00 ppm (mg/L) 0.0 to 300.0% 0.0 to 50.0 °C (32.0 to 122.0 °F)** |
| DO Accuracy (@25˚C/77˚F) |
±1.5% of reading or ±1 digit |
| DO Resolution |
0.01 ppm (mg/L) 0.1% saturation |
| DO Calibration |
One or two points at 0% (HI 7040) and 100% (water saturated air) |
| DO Temperature Compensation |
0.0 to 50.0 ˚C (32.0 to 122 ˚F) |
| Salinity Compensation |
0 to 40 g/L, 1 g/L |
| DO Altitude Compensation |
-500 to 4000 m (with 100 m resolution) |
| Temperature Range |
-20.0 to 120.0 ˚C, -4.0 to 248.0 °F |
| Temperature Resolution |
0.1 °C, 0.1 °F |
| Temperature Accuracy |
±0.5 °C, ±1.0 °F |
| pH Electrode |
HI11310 digital double junction, refillable with 3.5M KCl electrolyte solution pH electrode, built in temperature sensor, and 3.5 mm connector.ᵻ |
| EC/TDS Probe |
HI763100 EC/temperature probeᵻ |
| DO Probe |
HI764080 DO/temperature probe |
| Power Supply |
5 VDC adapter (included) |
| Environment |
0 to 50°C (32 to 122°F), RH max 95% non-condensing |
| Dimensions |
202 x 140 x 12.7mm (8in. x 5.5in. x 0.5in.) |
| Weight |
250 g (8.82 oz) |
| Ordering Information |
HI2040 DO kit includes: HI764080 Dissolved Oxygen electrode, HI7041S Refill electrolyte solution, 2 DO membrane caps, 2 DO membrane cap o-rings and Quality certificate. |
| Special Notes |
‡ absolute conductivity *temperature limits will be reduced to actual probe/sensor limits ** with temperature compensation function disabled ᵻAvailable for purchase separately |
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