edge® Multiparameter DO Meter - HI2040

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edge® Multiparameter DO Meter - HI2040


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Hanna Instruments is proud to introduce the world’s most innovative pH meter: edge®.

edge®’s groundbreaking design is the culmination of Hanna’s vision, design capabilities, integrated production and world-class R&D. edge® is a single meter that can measure pH, Conductivity, and Dissolved Oxygen and is incredibly easy to use. We put a lot of thought into edge®’s ease of use.

edge screen size

Large Easy to Read LCD

edge® features a 5.5” LCD display that you can clearly view from over 5 meters away. The large display and it’s wide 150° viewing angle provide one of the easiest to read LCD’s in the industry.

Capacitive Touch

Capacitive Touch

edge® features a capacitive touch keypad that gives a distinctive, modern look. Since the keypad is part of the screen, your buttons can never get clogged with sample residue. The up and down keys move faster when continuously held (ideal for scrolling through numerous logs).

Clear Full Text Readout

Clear Full-Text Readout

edge® features clear, full-text guides displayed on the bottom of the screen. There is no need to decipher scrambled abbreviations or symbols; these helpful messages guide you through every process quickly and easily.


In Cradle

edge® is packed with many cutting-edge features to ensure accuracy and usability.

Digital Electrodes

Digital Electrodes

edge® electrodes are highly advanced, featuring a built-in microchip that stores calibration information that is automatically retrieved by edge® once the electrode is plugged in. These digital electrodes also feature an easy to plug in 3.5 mm connector so you never have to worry about the right angle or aligning pins.

Sensor Check

Clark Type Polarographic DO Probe

edge®HI764080 DO probe has an integrated temperature sensor incorporated into the thin ½” PEI body for automatic temperature compensation of dissolved oxygen measurements. The HI764080 probe uses screw on replaceable caps with a PTFE (Polytetrafluoroethylene) membrane that is easily replaced in the field as well in the lab. The supplied HI7041S is a concentrated Potassium Chloride fill solution used with the Clark-type polarographic technology. With this technology, an external voltage is applied to the platinum cathode and silver anode to establish a current that is proportional to the concentration of oxygen in a solution.

3.5mm Probe Input

3.5 mm Probe Input

Plugging an electrode in has never been simpler; no alignments, no broken pins, just connect the 3.5 mm plug and get started.



edge® is incredibly versatile. It can be used in a variety of ways and in a variety of environments without taking up the space of a traditional benchtop meter.

wall mount

Wall Mount

Using the wall mount cradle (included), edge® can be placed on a wall, leaving a zero footprint on the benchtop space. The cradle has a built-in connector to power edge® and charge its batteries. edge®'s zero footprint is designed to save you valuable benchtop space.


Cradle and Electrode Holder

edge® is equipped with a benchtop cradle with an adjustable swivel electrode holder to charge and hold the edge® securely in place at the optimum viewing angle.


edge® is incredibly thin and weighs only 8.8 oz., has an 8-hour battery life, and dual USB inputs.


Two USB Ports

edge® includes one standard USB for exporting data with a flash drive and a second micro-USB port for you to connect to a computer for file export and for charging your edge® when the cradle is not available.

data logging


Data Logging

edge® allows you to store up to 1000 log records of data. Data sets include readings, GLP data, date and time.

basic mode


Basic Mode

You can use edge® in Basic Mode, ideally for routine measurements for a simplified screen and features.



pH Range -2.000 to 16.000 pH, -2.00 to 16.00 pH, ±1000 mV
pH Resolution 0.001 pH, 0.01 pH, 0.1 mV
pH Accuracy ±0.002 pH, ±0.01 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 ATC: -5.0 to 100.0ºC; 23.0 to 212.0°F*
pH CAL Check (electrode diagnostics) glass and reference junction diagnostics ( HI 11311 & HI 12301 only), out of calibration range , probe condition, response time


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, absolute conductivity ‡
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, Seawater

Salinity (% NaCl) Range 0.0 to 400.0% NaCl *
Salinity (% NaCl) Resolution 0.1% NaCl
Salinity (% NaCl) Accuracy ±1% of reading (@25ºC/77ºF)
Salinity (% NaCl) Calibration 1 point with HI 7037L 100% NaCl sea water standard
Salinity (PSU) Range 2.00 to 42.00 PSU *
Salinity (PSU) Resolution 0.01 PSU
Salinity (PSU) Accuracy ±1% of reading (@25ºC/77ºF)
Salinity (PSU) Calibration through EC calibration
Salinity (g/L) Range 0.0 to 80.0 g/L *
Salinity (g/L) Resolution 0.01 g/L
Salinity (g/L) Accuracy ±1% of reading (@25ºC/77ºF)
Salinity (g/L) Calibration through EC calibration

Oxygen, Dissolved

Oxygen, Dissolved Range 0.00 to 45.00 ppm (mg/L), 0.0 up to 300.0% saturation
Oxygen, Dissolved Resolution 0.01 ppm, 0.1% saturation
Oxygen, Dissolved Accuracy ±1 digit, ±1.5% of reading
Oxygen, Dissolved Calibration one or two points at 0% (HI 7040 solution) and 100% (in air)
Oxygen, Dissolved Temperature Compensation ATC: 0 to 50 ºC; 32.0 to 122.0 °F
Salinity Compensation 0 to 40 g/L (with 1 g/L resolution)
Altitude Compensation -500 to 4000 m (with 100 m resolution)

Meter Temperature

Temperature Range -20.0 to 120.0 ºC, -4.0 to 248.0 °F
Temperature Resolution 0.1 °C, 0.1 °F
Temperature Accuracy ±0.5 °C, ±1.0 °F

General Meter

DO Probe HI 764080 (included)
Logging Type Manual log-on-demand (Max. 200 logs); Manual log-on-stability (Max. 200 logs); Interval logging *** (Max. 600 samples; 100 lots)
Logging Memory up to 1000*** records
Connectivity 1 micro USB port for charging and PC connectivity, 1 USB port for storage
Battery Type/Life Built-in rechargeable battery with up to 8 hours of continuous use
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 (8” x 5.5” x 0.5”)
Weight 250 g (8.82 oz)
Ordering Information HI2040 includes: HI764080 Dissolved Oxygen electrode, HI7041S refill electrolyte solution, (2) DO membrane caps, (2) DO membrane cap o-rings,USB cable, benchtop docking station with electrode holder, wall mount cradle, 5 VDC power adapter, instruction manual, and quality certificate.
Notes *Standard Mode Only
** Temperature limits will be reduced to actual probe/sensor limits.
‡Absolute conductivity (or TDS) is the conductivity (or TDS) value without temperature compensation.