Go Direct® Gas Pressure Sensor (GDX-GP)
Specifications and User Guide

-Primary Test: Connect the sensor and run the data-collection program. The units for the default readings are kPa and they should be reasonable for the altitude at which the sensor is being used (around 101 kPa at sea-level).
-Secondary Test: Connect a 20 mL syringe, from the Accessories Kit, to the sensor. Move the plunger of the syringe inward and check that the pressure readings increase.

Can I Order Pressure Sensor Accessories Separately?
What is the internal volume of the Gas Pressure Sensor?
Is there a list of chemicals that should not be used with the Gas Pressure Sensor?
What plastic tubing is used for the Pressure Sensor Accessories Kit?

What type of plastic is the Gas Pressure Sensor 2-Way Valve?
Where can I find low-friction glass syringes for combined gas law experiments done with our Gas Pressure Sensor?
Is it OK to use Go Wireless or Go Direct sensors in a vacuum?

You do not have to perform a new calibration when using the Gas Pressure Sensor. The sensor is calibrated prior to shipping. If you would like to perform your own calibration, follow the steps described here. A one-point calibration at atmosphere is adequate for most applications.
To perform a one-point calibration,
1. Connect the Gas Pressure Sensor and launch the software.
2. Initiate the calibration procedure and make sure the one-point calibration option is checked. This should be the default option.
3. Enter the actual pressure as the known value for Reading 1.
4. When the voltage reading stabilizes, click Keep.
5. If you want to use the calibration for the current session only, click Done to complete the calibration process. To save the calibration onto the sensor, click the storage tab and save to the sensor.

If the sensor can be turned on when connected by USB but not when disconnected from USB, the battery either needs charging or has reached its end of life and can no longer hold a charge. First, try charging the sensor for several hours. If the sensor still won’t turn on when disconnected from USB, the battery has likely reached its end of life. If you intend to use this sensor wirelessly, the battery will need to be replaced. The rechargeable battery in this sensor is covered by a one year warranty but should last two to five years in typical use.

Gas Pressure Sensor Replacement Parts (PS-ACC)
#1 1-hole Rubber Stopper (PS-STOP1)
#5 2-hole Rubber Stopper (PS-STOP5)
Luer-Lock Connector (PS-LUER)
Plastic 2-Way Valve (PS-2WAY)
Plastic Tubing (PS-TUBING)
Stopper Stem (PS-STEM)
Plastic Syringe (PS-SYR)
Plastic Tubing Clamps (Pack of 100) (PTC) (pkg. of 100)