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Hanna Instruments HI 11312 HALO® pH electrode


Glass body refillable bluetooth® pH electrode for general purposes

SKU: HI 11312 HALO Category:


The World’s First pH Electrode with Bluetooth® Smart Technology

HALO™ is the world’s first professional pH probe with Bluetooth® Smart technology (Bluetooth® 4.0). It is a high quality, double junction, refillable glass pH probe with a built-in temperature sensor that can be used virtually anywhere: in the field, laboratory or classroom. Its flexibility and ease of use will revolutionize the way pH is measured.
HALO™ transmits measurement data directly to an Android or Apple device(not included) running the Hanna Lab App.

One press Connect
Easily connect to the Hanna Lab App (required for use) at the press of a button via Bluetooth® wireless technology (10 m range (33’)).

Status Indicator
Visible from a distance, LED “halo” light indicates probe is active and transmitting.

Easy to replace battery
The HALO’s CR2032 lithium ion battery is easily replaceable and lasts for approximately 500 hours.

One Button Sample Tagging
Pressing either the button on the HALO™ pH probe or the probe icon in the Hanna Lab App will tag sample data for easy reference.

Integrated Temperature Sensor
Ensures the calibration and measurement is automatically temperature compensated, thus eliminating error.

Stored Calibration Data
HALO™ stores calibration information; no additional calibration is needed when switching to another iPad.

The Hanna Lab App turns an Android or Apple device into a full-featured pH meter when used with the Hanna HALO™ pH probe with Bluetooth Smart technology. Functions include calibration, measurement, data logging, graphing and data sharing. Measurement and logging of pH and temperature at one second intervals start as soon as the probe is connected. Measurements can be displayed alone on the display, with tabulated data, or as a graph. The graph can be panned and zoomed with the iPad’s pinch-to-zoom technology for enhanced viewing.

Probe calibration using up to 5 buffers
The Hanna Lab App incorporates a probe calibration using up to five pH buffers that are automatically recognized and temperature corrected to 25.0ºC during calibration.

Real-time Data
Display of pH and temperature updated every second. Readings are automatically saved to a history file every hour, limited only by the available memory on the iPad.

Fluid, Dynamic Graphing
Measurement can be displayed with tabulated data or a graph on the display. The graph axes may be expanded using the iPad’s pinch and zoom technology for enhanced viewing.

Connecting the HALO™ probe to the Hanna Lab App is simple. Tap the Bluetooth® icon in the top-right corner to view all available HALO™ probes then press the button on your HALO™ probe. Select the newly discovered HALO™ probe from the list of available probes. If a previously associated probe is in discovery mode when the app is opened it will connect to that probe automatically.

GLP (Good Laboratory Practice)
Displays date and time of current calibration, probe offset, and average slope, along with calibrated buffers, mV values, temperature and slopes between each buffer.

Calibration Reminder & Measurement Alarms
Alerts you when HALO™ needs calibration, and if the measurement threshold is exceeded.

Log & Share Data
Saved log files may be annotated with measurement specific information. Share data via email in CSV format.

Help & Tutorials
Demo probe mode helps you explore features of the Hanna Lab App. General app information, General HALO™ information, pH tutorial, maintenance tutorial, and contact information are available in help.

**NOTE, a wide range of other Hanna Instruments Bluetooth®  pH electrodes for different applications also available, please contact us for more information!

Accuracy (@25ºC/77ºF) ±0.005 pH / ±0.3 mV
Battery Type/Life CR2032 3V lithium ion / approximately 500 hours
Body Material Glass
Calibration Buffers 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45 pH
Calibration Points Up to five points with seven standard buffers
Connection Bluetooth Smart (Bluetooth 4.0), 10 m (33′) range
Digital Yes
Electrolyte 3.5M KCl
Environmental Conditions 0 to 50°C (32 to 122°F), electronic module is not waterproof
Junction Ceramic
Outer Diameter 12 mm
Overall Length 195 mm
Range pH^ 0.00 to 13.00
Range -2.000 to 16.000 pH / ±800 mV / -20.0 to 120.0 ºC *(will be reduced to actual probe/sensor limits)
Reference Double, Ag/AgCl
Resolution 0.1, 0.01, 0.001 pH / 1, 0.1 mV
Solution Temperature -5 to 80°C (23 to 176°F)
Temperature Sensor integrated
Tip Shape spheric
x Hanna Lab App Measurement Specifications
Bulb Shape spherical


6 month limited warranty

Ordering Information
HI11312 (HALO™) is supplied with storage solution, cleaning solution, pH 7.01 buffer solution, pH 4.01 buffer solution, fill solution, battery, quality certificate and instruction sheet. Smartphone and tablet not included.

Compatibility/System Requirements

HALO pH electrodes are compatible with HI2202 edgeblu meter and the following devices:

Compatible with most devices equipped with Bluetooth Smart Technology (Bluetooth 4.0) and running Android 4.3 or later.

iPad (3rd generation or newer)
iPhone (4S or newer)
iPod Touch (5th generation or newer)

Download Information
Hanna Lab App is available free to download and use from




Additional information

Weight 0,2 kg