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HI2640 enables fast, accurate dissolved oxygen measurements in ppm and % saturation utilizing the Hanna Instruments HI764080 digital dissolved oxygen probe with an integral temperature sensor. The probe has a unique serial number and, once connected, is automatically identified by the meter. The intuitive design simplifies configuration, calibration, and measurement.
Large display with capacitive keys The meter features a 5.5” (14 cm) LCD display. The large display provides a 130° wide viewing angle.
Main feature points
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Automatic parameter recognition
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Choice of measurement unit:
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ppm (mg/L)
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% saturation
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Basic mode for simplified operation
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Dedicated GLP key
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Internal clock and date
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Atmospheric pressure sensor in probe
Features in-depth
Digital probe input
Simply connect each probe via the 3.5 mm jack; Digital Smart Electrodes are automatically recognized.
Clear, full text readout
The HI2640 presents clear, detailed text prompts at the bottom section of the screen.
Atmospheric pressure sensor
To make measurements the most accurate, the dissolved oxygen digital probe used with HI2640 features an atmospheric pressure sensor for automatic pressure compensation.
GLP (Good Laboratory Practice)
The sensor retains data from the most recent calibration, including the date, time, and standards utilized.
Capacitive touch keypad
HI2640 features sensitive capacitive touch buttons for accurate keystrokes for navigating menus and screens. Since they are part of the screen, the buttons can never get clogged with sample residue.
Easy to read LCD
HI2640 features a 5.5” (14 cm) LCD display that you can clearly view from over 5 m (16.4’). The large display, with its wide 150° viewing angle, provides one of the easiest to read LCDs in the industry.
| Parameter | Characteristic | Specification |
| Dissolved oxygen (using HI764080 dissolved oxygen probe) | Range |
0.00 to 45.00 ppm (mg/L) 0.0 to 300.0% |
| Resolution |
0.01 ppm (mg/L) 0.1% |
|
| Accuracy | ±1.5% of reading ±1 digit | |
| Calibration | One or two points at 0% (HI7040) and 100% (water-saturated air) | |
| Pressure compensation |
Automatic 450.0 to 850.0 mmHg |
|
| Resolution | 0.1 mmHg | |
| Salinity compensation | 0 to 40 g/L | |
| Resolution | 1 g/L | |
| Temperature compensation | 0.0 to 50.0 °C (32.0 to 122 °F) | |
| Temperature | Range | -20.0 to 120.0°C; -4.0 to 248.0°F ** |
| Resolution | 0.1 °C (0.1 °F) | |
| Accuracy (@25°C/77°F) | ±0.5 °C (0.9 °F) | |
| Additional specifications | PC interface | USB-C |
| Power supply | USB Type C (5 VDC; 500 mA) | |
| Environment |
0 to 50 °C (32 to 122 °F) Maximum 95 % RH non-condensing |
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| Dimensions | 205 x 160 x 77 mm (8.0 x 6.2 x 3.0 ”) | |
| Weight | Approximately 0.85 kg (1.87 lbs.) |
** Temperature limits will be reduced to actual probe limits.
