You can find this information using the Go Wireless data-collection software.

Go Wireless app or Graphical Analysis GW for iPad, iPhone, and iPod touch
1. Press the power button on Go Wireless sensor to turn it on. The sensor LED will flash red.
2. Start the data-collection app. From the list of available sensors, tap the information icon associated with your sensor to see the serial number and hardware/firmware version for your sensor.
Note: If you are using Graphical Analysis you must first tap Create Experiment and choose Wireless Sensors to view the list of available wireless sensors.

Go Wireless app  or Graphical Analysis GW for Android
1. Press the power button on Go Wireless sensor to turn it on. The sensor LED will flash red.
2. Start the data collection app. Select your sensor from the list of available sensors. The sensor LED will flash green.
3. Tap the Overflow menu and select Details to see the serial number and hardware/firmware version for the sensor.

LabQuest 2 and LabQuest 3
(some LabQuest 2 may require additional hardware, see How do I know if my LabQuest will work with Go Direct Sensors and Go Wireless devices?)
1. Press the power button on Go Wireless sensor to turn it on. The sensor LED will flash red.
2. Select Wireless Device Setup > Go Wireless from the Sensors menu.
3. Select your sensor from the list of available sensors and tap OK. The sensor LED will flash green.
4. Tap the meter associated with the sensor and choose Go Wireless > Sensor Info to see the serial number and hardware/firmware version for the sensor.