HI11312 HALO Wireless General Use pH Meter
HI11312 HALO Wireless General Use pH Meter HALO® Bluetooth® Wireless Probes Selangor, Malaysia, Penang, Sabah, Kuala Lumpur (KL), Petaling Jaya (PJ), Sungai Nibong, Kota Kinabalu Supplier, Suppliers, Supply, Supplies | Hanna Instruments (M) Sdn Bhd
RM 1,349.00
SKU: HI11312
100 g
20 cm (L) x 1 cm (W) x 1 cm (H)
1 in stock
Hanna Instruments HI11312 HALO Wireless pH Meter

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HALOTM - pH Probe with Bluetooth® Smart Technology

The World’s First pH Electrode with Bluetooth Smart Technology

The HI11312 HALO is a Bluetooth Smart (Bluetooth 4.0) pH and temperature electrode with a refillable glass body and spheric, general purpose glass sensing bulb.

The double junction design ensures that the KCl electrolyte is free of silver chloride (AgCl) between the sample to be measured and the internal reference cell, resisting clogging and any potential precipitation at the junction.

All readings are transmitted directly to the HI2202 edgeblu or a compatible Apple or Android device running the Hanna Lab App.

One Press Connect

Easily connect to the Hanna Lab App at the press of a button via Bluetooth wireless technology.

Status Indicator

Visible from a distance, the LED “halo” light flashes to indicate the status of the probe.

Easy-to-Replace battery

The HALOs CR2032 lithium ion battery is easily replaceable and lasts for approximately 500 hours.



The HI11312 HALO is a revolutionary pH electrode that incorporates Bluetooth Smart (Bluetooth 4.0) wireless technology with an application-specific design. This electrode has many features that makes it ideal for use in a wide variety of applications. These features include general purpose (GP) glass, spheric bulb, integrated temperature sensor, glass body, and double reference junction with silver-free electrolyte.

General Purpose Glass Formulation

General Purpose (GP) glass, as the name implies, is a standard glass formulation that is used for general use. A pH electrode with GP glass will have a resistance of 100 megaohms at 25°C and is suited for measuring pH of samples that are at ambient temperatures. The HI11312 is suitable to use with samples that measure from -5 to 80°C (23 to 176°F).

Spheric Glass Tip

The spheric bulb is for general purpose use within laboratory environments and applications that measure aqueous solutions due to its large surface area. Other tip shapes include conic for penetration and flat tip for surface measurements.

Built-In Temperature Sensor

HI11312 features a built-in thermistor temperature sensor that is in the tip of the indicating pH electrode. A thermistor temperature sensor provides for a high accuracy temperature reading and should be as close as possible to the indicating pH electrode in order to compensate for the effect that temperature has on the membrane potential as predicted by the Nernst equation. By having an accurate reading it is possible to provide a temperature compensated reading.


pH electrode

Glass Body

The glass body of the HI11312 is ideal for laboratory use and measurement of grab samples. The glass is resistant to many harsh chemicals and is easy to clean. The glass body also allows for a fast transfer of heat to the internal reference electrolyte. The mV generated by the reference cell is temperature dependent, so the faster thermal equilibrium is reached, the steadier the reference potential.

Single Ceramic Double Junction Reference

The HI11312 is a double junction design. pH electrodes are available as single junction or double junction. See below for a complete description of the differences. The junction also known as a salt bridge is necessary component of the electrical circuit. The movement of ions must flow through the junction for a steady reading. The outer reference has a single ceramic frit. The ceramic is a porous material that is easily fused with the glass body and has a similar expansion coefficient. A single ceramic junction allows the 3.5M KCl electrolyte to flow at a rate of 15 to 20 μL/hour.



Conventional electrodes are normally single junction. As depicted by the figure above, these electrodes have only a single junction between the internal reference wire and the external solution. Under adverse conditions, such as high pressure, high temperature, highly acidic or alkaline solutions, the positive flow of the electrolyte through the junction is often reversed resulting in the ingress of sample solution into the reference compartment. If this is left unchecked, the reference electrode can become contaminated, leading to complete electrode failure. Another potential problem with single junction electrodes is the clogging of the junction due to silver chloride (AgCl) precipitation. Silver can be easily precipitate in samples that contain Tris buffer or heavy metals. When the electrolyte solution makes contact with the sample, some AgCl will precipitate on the external face of the junction. The result is drifty readings obtained from the sensor.

Hanna’s double junction system, as the name implies, has two junctions, only one of which is in contact with the sample as shown in the figure. Under adverse conditions, the same tendency of sample ingress is evident. However, as the reference electrode system is separated physically from the intermediate electrolyte area, the contamination of the electrode is minimized. The likelihood of clogging of the junction is also reduced with a double junction electrode since the outer reference cell uses a fill solution that is “silver-free.” Since there is no silver present, there is no precipitate that can form to clog the junction.

Hanna Lab App

HALO pH electrodes can connect with HI2202 edgeblu meter or a compatible Apple or Android device running the Hanna Lab App.

HALOTM - pH Probe with Bluetooth® Smart Technology

The Hanna Lab App turns a compatible Apple or Android 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 pinch-to-zoom technology for enhanced viewing.

Five-Point Calibration

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 device.


Fluid, Dynamic Graphing

Measurement can be displayed with tabulated data or a graph on the display. The graph axes may be expanded using pinch-to-zoom technology for enhanced viewing.


HALO pH probe features

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

The Hanna Lab App alerts you when HALO needs calibration or if a measurement threshold is exceeded.


Log & Share Data

Saved log files may be annotated with measurement specific information. Data is easily shared 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.

Hanna Lab App Features/Benefits:

Connects to HALO electrodes via Bluetooth Smart Technology (Bluetooth 4.0)

Up to five-point pH calibration with seven standard pH buffers available
Calibration reminder
  • Alerts you when HALO needs calibration
Real-time data
  • Displays pH and temperature updated every second
Basic GLP
  • Displays date and time of current calibration along with probe offset and average slope
Full GLP
  • Measurement can be displayed with tabulated data or as a graph. The graph axes may be expanded using pinch-to-zoom technology for enhanced viewing
Fluid, dynamic graphing
  • Measurement can be displayed with tabulated data or as a graph. The graph axes may be expanded using the pinch-to-zoom technology for enhanced  viewing
Measurement alarms
  • Alerts you if the measurement threshold is exceeded
One button sample tagging
  • Pressing either the probe icon in the Hanna Lab App or button on the HALO pH probe will tag sample data for easy reference
Data-logging with custom annotations
  • Saved log files may be annotated with measurement  specific  information
  • Data is autosaved every hour
Four ways to save and share data:
  • All data since last autosave
  • Annotations only
  • All data within a timed interval
  • Annotations only within a timed interval
Share data via email in CSV format

Help and tutorials:
  • Demo probe mode to help explore features of the Hanna Lab App
  • General app information
  • General HALO information
  • pH tutorial
  • Maintenance tutorial
  • Contact information


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)

Information about which products have Bluetooth Smart Technology (4.0), also known as low energy (LE), can be found here.


SKU HI11312
Product Name HALO® Glass Body Refillable pH Electrode with Bluetooth® - HI11312
Quote Required Yes
Measurement Range pH
Reference Cell Type double, Ag/AgCl
Junction Type/Flow Rate ceramic
Refill Electrolyte 3.5M KCl
Body Material glass
Tip / Shape spheric
Matching Pin no
Max. Pressure 0.1 bar
Temperature Operating Range -5 to 80°C (23 to 176°F)
Body Length/Overall Length 120 mm / 195 mm
Temperature Sensor yes
Outer Diameter 12 mm
Connector Type Bluetooth Smart (Bluetooth 4.0), 10 m (33') range
Battery Type/Life CR2032 3V lithium ion / approximately 500 hours
Amplifier yes
Recommended Use laboratory general purpose
Notes Environment
Range -2.000 to 16.000 pH / ±800 mV / -20.0 to 120.0 ºC *(will be reduced to actual probe/sensor limits)
Resolution 0.1, 0.01, 0.001 pH / 1, 0.1 mV
Accuracy (@25ºC/77ºF) ±0.005 pH / ±0.3 mV
Calibration Points Up to five points with seven standard buffers
Calibration Buffers 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45 pH
Temperature Compensation Automatic from -5.0 to 100.0 ºC / 23.0 to 212.0 ºF *(will be reduced to actual probe/sensor limits)
Compatibility/System Requirements Android
Download Information Hanna Lab App is available free from the Play Store or App Store
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.


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