Vernier Go Wireless GW-PH, Go Wireless GW-PH-NP, Go Wireless pH Series User Manual

Vernier Go Wireless® pH

Order Code GW-PH or GW-PH-NP

The Vernier Go Wireless pH is a
rugged, general-purpose, wireless
pH sensor. The Vernier Go Wireless
pH can be used for any experiment
or demonstration that can be done
with a traditional pH meter,
including acid-base titrations,
monitoring pH in an aquarium, and
investigating the water quality of
streams and lakes.

What is Included with Go Wireless pH

 Go Wireless pH (Go Wireless Electrode Amplifier connected to pH Electrode via

BNC)

 pH storage solution bottle with pH storage solution
 USB Charging Cable (not included in GW-PH-NP)
 This user guide
 Go Wireless app (free download from the App Store)

Charging Go Wireless pH

Connect Go Wireless Electrode Amplifier to the included USB Charging Cable and
any USB device for two hours. Connecting the pH Electrode to the Electrode
Amplifier during charging is optional.

You can also charge up to eight Go Wireless Electrode Amplifiers or Go Wireless
Temp probes using our Go Wireless Charging Station, sold separately (order code:
GW-CRG). An LED on each Go Wireless Electrode Amplifier indicates charging
status. A blue light indicates it is still charging. When the light goes off, it is finished
charging.

Supported Devices

Go Wireless pH can be used with supported mobile devices* that have Bluetooth®
Smart support and one of our apps.

®

 iPad
 iPhone
 iPod
 LabQuest 2 (model LQ2-LE), see www.vernier.com/til/3085/
 For Android

(3rd generation or newer), iPad mini, and iPad Air

®

(4S or newer)

®

touch (5th generation or newer)

™

devices, see www.vernier.com/gw-app

Data-Collection Apps

Go Wireless pH can be used with supported mobile devices* that have Bluetooth
Smart support and one of our apps.

 Go Wireless app (free iOS app) Available as a free download from the App

Store, use this app to see a live digital readout from the sensor, record data for
real-time graphing, and export data for further analysis in Graphical Analysis™
for iPad and other applications. For more information or to download the app, see
www.vernier.com/gw-app

 LabQuest 2 app (version 2.4 or newer)

NOTE: Vernier products are designed for educational use. Our products are not

designed nor are they recommended for any industrial, medical, or commercial
process such as life support, patient diagnosis, control of a manufacturing process, or
industrial testing of any kind.

*

For a full list of supported mobile devices, see www.vernier.com/gw-app

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Specifications

pH Electrode

pH range 0–14
Temperature range 5 to 80°C (readings not compensated)
Accuracy ±0.5 pH units (factory calibration)

±0.1 pH units (user calibration)

Type Single junction

Sealed, gel-filled, Ag/AgCl
Response time 2 s (to 90% of full reading in buffer)
Shaft diameter 12 mm OD
Shaft material Polycarbonate plastic

Electrode Amplifier

Radio 2.4 GHz Bluetooth 4.0, Low Energy
Battery 100 mA Li-Poly
Battery life (continuously on,
1 sample per second)

3 days

Input range ±1000 mV
Temperature range –10 to 45ºC
Maximum wireless range 30 m unobstructed

How Go Wireless pH Works

The electrode amplifier handle is a circuit that allows the standard combination pH
electrode to be monitored by a lab interface wirelessly.

The Go Wireless pH will produce a voltage of approximately 0.0 volts in a pH 7
buffer. The voltage will increase by about 60 mV for every pH number decrease.
The voltage will decrease by about 60 mV/pH number as the pH increases. It should
read approximately 160 mV in pH 4 buffer and 170 mV in pH 10 buffer.

The Vernier gel-filled pH Electrode is designed to make measurements in the pH
range of 0 to 14. The gel-filled reference half cell is sealed; it cannot be refilled.

Go Wireless Electrode Amplifier has one button and three LEDs.

Button

 Press the button once to turn on Go Wireless Electrode Amplifier. A red LED

indicator flashes when the unit is on.

 Press and hold the button for more than three seconds to put Go Wireless

Electrode Amplifier into sleep mode. The red LED indicator stops flashing when
sleeping and LED light is off.

 Press and hold the button for more than eight seconds to reset the system. This

should not be necessary in normal operation.

Blue LED

Indicates charging status when Go Wireless Electrode Amplifier is connected to the
Charging Cable or Charging Station.

 On – charging in progress
 Off – charging is complete

Red LED Flashing

Indicates Go Wireless Electrode Amplifier is awake and ready to connect.

Green LED Flashing

Indicates Go Wireless Electrode Amplifier is connected and taking data.

Red and Green LED Off

Indicates Go Wireless Electrode Amplifier is in the lowest power sleep mode.

Collecting Data

Ensure that the BNC connection between the Go Wireless Electrode Amplifier and
the pH Electrode is secure.

To prepare the electrode to make pH measurements, remove the storage bottle from
the electrode by first unscrewing the lid and then removing the bottle and lid.
Thoroughly rinse the lower section of the probe, especially around the bulb-shaped
tip, using distilled or deionized water. Note: Do not completely submerge the sensor.
The handle is not waterproof.

Collecting Data with Go Wireless App

1. Press the power button on Go Wireless Electrode Amplifier to turn it on. The
LED on the sensor will flash red.

2. Launch the app. Select your Go Wireless pH from the list of available sensors.
When the sensor is paired with the software, the sensor LED will flash green.

Note: To collect data in mV, tap on the radio icon in the upper right corner. Under

Units, select mV.

3. Place the sensor tip into a beaker containing your sample. It is recommended that
you use a utility clamp or electrode support to fasten the pH Sensor to a ring
stand, as shown on next page.

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