When using our GDX sensors with our programs, Graphical Analysis and Instrumental Analysis, or with a LabQuest, you do not need to know the channels of our GDX sensors, you just choose them from a list. If you are writing your own programs in Python, VPython, Web VPython, Arduino, JavaScript, knowing the numbers of the channels is important.
Note that for the vast majority of sensors, programmers can just use channel 1. You can always check the channels by running this Python program gdx_getting_started_device_info.py. This program is available as part of our GDX Python collection at: https://vernierst.github.io/godirect-examples/python/
You can also check the channel numbers by reading the sensor map in Graphical Analysis with the sensor connected. This is a complex file and it is a challenge to find the information this way.
Here is a list of GDX sensors (in alphabetical order by order code) and their channels.
GDX-3MG
- 1 X magnetic fieldÂ
- 2 Y magnetic field
- 3 Z magnetic field
- 4 X magnetic field 130 mT
- 5 Y magnetic field 130 mT
- 6 Z magnetic field 130 mT
GDX- ACC
- 1 through 3 acceleration X,Y,ZÂ (m/s^2)
- 4 through 6 acceleration X,Y,Z (high range )(m/s^2)
- 7 through 9 gyro (radians/s)
- 10 altitude (m)
- 11 angle (degrees)
GDX-CART
- 1 Position
- 2 Force
- 3 X AccelerationÂ
- 4 Y AccelerationÂ
- 5 Z AccelerationÂ
GDX-CCS
- 1 Current
GDX-CO2
- 1 CO2 Gas
- 2 Temperature  Â
- 3 Relative Humidity
GDX-COL
- 1 Transmittance
GDX-CON
- 1 Conductivity 0% Temperature Compensated
- 2 Conductivity
- 3 Temperature
GDX-DC
- 1 Volume
GDX-EA (used for pH)
- 1 Potential
- 2 pH
GDX-EKG
- 1 EKG
- 2 Heart Rate
- 3 EMG
- 4 EMG Rectified
- 5 Voltage
GDX-ETOH
- 1 Ethanol Vapor
GDX-HD
- 1 Force
- 2 X-axis acceleration
- 3 Y-axis acceleration
- 4 Z-axis acceleration
- 5 X-axis gyro
- 6 Y-axis gyro
- 7 Z-axis gyro
GDX-ISEA
- 1 Potential
- 2 Nitrate
- 3 Ammonium
- 4 Calcium
- 5 Chloride
- 6 Potassium
GDX-NRG
- 1 Potential
- 2 Current
- 3 Power
- 4 Resistance
- 5 Energy
GDX-LC
- 1 Light ( lux)
- 2 UV
- 5 Â 615 nm
- 6Â 525 nm
- 7Â 465 nm
GDX-MD
- 5Â Motion
- 6 Motion (cart)
- 7 Motion with TC
(all incompatible with one another)
GDX-O2
- 1 O2 Gas
- 2 O2 Gas Temperature Compensated
- 3 Temperature
GDX-ODO
- 1 DO Concentration
- 2 DO Saturation
- 3 Temperature
- 4 Pressure
- 5 DO Salinity
GDX-Q
- 1 Charge
- 2 Potential
GDX-RB
- 1 Force
- 2 Respiration Rate
- 4 Steps
- 5 Step Rate
GDX-RMS
- 5 Angle
- 6 Angle (high resolution)
GDX-SND
- 1 Sound Pressure (needs to be sampled at a high speed)
- 2 Sound Level (A weighted) (can be as slow as sampled a few times a second)
- 3Â Sound Level (C weighted) (can be as slow as sampled a few times a second)
- 4 Wave Amplitude
GDX-ST
- 1 Temperature
GDX-TMP
- 1 Temperature
GDX-WRT
- 1 Temperature
GDX-WTHR
- 1 wind speed (m/s)
- 2 wind direction (degrees)
- 3 wind chill (degrees C)
- 4 temperature (degrees C)
- 5 heat index (degrees C)
- 6 dew point (degrees C)
- 7 relative humidity (%)
- 8 absolute humidity (g/m^3)
- 9 station pressure (mbar)
- 10 barometric pressure (mbar)
- 11 altitude (m)