• Go Direct Spirometer
• Disposable mouthpieces (3)
• Disposable bacterial filter (3)
• Nose clips (3)
• Micro USB Cable

Choose a platform below to see its compatibility requirements.

LabQuest

Interface	LabQuest App
LabQuest 3	Full support
LabQuest 2 (discontinued)	Full support 1
LabQuest (discontinued)	Incompatible

Compatibility Notes

1. Wireless connection of this sensor to a LabQuest 2 requires a Go Direct Bluetooth Adapter when used with some older LabQuest 2 models.

Computers

	Software
Interface	Graphical Analysis
No interface required	Full support 1
LabQuest 3	Full support 2
LabQuest 2 (discontinued)	Full support 2 3

Compatibility Notes

1. For Bluetooth^® connectivity, only computers running Windows 10 or Mac OS X 10.10 or newer are supported. The computer must also have a compatible Bluetooth 4.0⁺ radio.
2. Connect this sensor directly to a computer or Chromebook via a USB or wireless Bluetooth^® connection for best results. Alternatively, this sensor is fully supported when used with LabQuest 2 or LabQuest 3 when the LabQuest is connected to a computer or Chromebook via Wireless Data Sharing.
3. Wireless connection of this sensor to a LabQuest 2 requires a Go Direct Bluetooth Adapter when used with some older LabQuest 2 models.

Chromebook

	Software
Interface	Graphical Analysis
No interface required	Full support
LabQuest 3	Full support 1
LabQuest 2 (discontinued)	Full support 1 2

Compatibility Notes

1. Connect this sensor directly to a computer or Chromebook via a USB or wireless Bluetooth^® connection for best results. Alternatively, this sensor is fully supported when used with LabQuest 2 or LabQuest 3 when the LabQuest is connected to a computer or Chromebook via Wireless Data Sharing.
2. Wireless connection of this sensor to a LabQuest 2 requires a Go Direct Bluetooth Adapter when used with some older LabQuest 2 models.

iOS

	Software
Interface	Graphical Analysis	Graphical Analysis GW
No interface required	Full support	Incompatible
LabQuest 3	Full support 1 2	Full support 2
LabQuest 2 (discontinued)	Full support 1 2 3	Full support 2 3

Compatibility Notes

1. Connect this sensor directly to a supported mobile device via a wireless Bluetooth^® connection for best results.
2. iOS and Android^™ devices can only connect to LabQuest 2 or LabQuest 3 via Wireless Data Sharing.
3. Wireless connection of this sensor to a LabQuest 2 requires a Go Direct Bluetooth Adapter when used with some older LabQuest 2 models.

Android

	Software
Interface	Graphical Analysis	Graphical Analysis GW
No interface required	Full support	Incompatible
LabQuest 3	Full support 1 2	Full support 2
LabQuest 2 (discontinued)	Full support 1 2 3	Full support 2 3

Compatibility Notes

1. Connect this sensor directly to a supported mobile device via a wireless Bluetooth^® connection for best results.
2. iOS and Android^™ devices can only connect to LabQuest 2 or LabQuest 3 via Wireless Data Sharing.
3. Wireless connection of this sensor to a LabQuest 2 requires a Go Direct Bluetooth Adapter when used with some older LabQuest 2 models.

Python

	Software
Interface	Python
No interface required	Full support

Javascript

	Software
Interface	Javascript
No interface required	Full support

LabVIEW

	Software
Interface	NI LabVIEW
No interface required	Full support 1

Compatibility Notes

1. For Bluetooth^® connectivity, only computers running Windows 10 or Mac OS X 10.10 or newer are supported. The computer must also have a compatible Bluetooth 4.0⁺ radio.

1. Charge your sensor for at least 2 hours before first use.
2. Turn on your sensor. The LED will blink red.
3. Launch Graphical Analysis, then click Sensor Data Collection.
4. Select your sensor from the list. The sensor ID is located on the sensor label near the bar code. Note: If you don’t see a list of available sensors, click WIRELESS. After selecting your sensor, click Pair.
5. This is a multi-channel sensor. Click SENSOR CHANNELS and select the channel(s) you want to use.
6. Click DONE. You are now ready to collect data.

Using other Vernier data-collection apps or want to connect via USB?

Visit www.vernier.com/start-go-direct

Note: This sensor also works with LabQuest 2 and LabQuest 3; it does not work with the original LabQuest.

Connect Go Direct Spirometer to the included Micro USB Cable and any USB device for two hours.

You can also charge up to eight Go Direct Spirometers using our Go Direct Charge Station, sold separately (order code: GDX-CRG). An LED on each Go Direct Spirometer indicates charging status.

Charging	Blue LED on steady while sensor is connected to the Micro USB Cable or Charging Station.
Fully charged	Blue LED is off when charging is complete.

Turning on the sensor	Press button once. Red LED indicator flashes when unit is on.
Putting the sensor in sleep mode	Press and hold button for more than three seconds to put into sleep mode. Red LED indicator stops flashing when sleeping.

See the following link for up-to-date connection information:

www.vernier.com/start/gdx-spr

Connected and charging	Blue and Green LED solid when sensor is connected to Graphical Analysis via USB and unit is charging. (Green LED is obscured by the blue one.)
Connected	Green LED solid when sensor is connected to Graphical Analysis via USB and the unit is fully charged. Green LED flashing when sensor is connected to Graphical Analysis via Bluetooth wireless technology.
Charging via USB, connected via Bluetooth wireless technology	Blue LED is solid and green LED is flashing, but the green flashing LED looks white because it is overwhelmed by the blue.

When two or more sensors are connected, the sensors can be identified by tapping or clicking Identify in Sensor Information.

Connect the probe following the steps in the Quick Start section of this user manual.

Go Direct Spirometer can be used for inspiratory and expiratory experiments.

Use a mouthpiece and a disposable bacterial filter with the Go Direct Spirometer for all experiments. According to the manufacturer’s specs, the MicroGard^® filters out more than 99% of bacterial and viral aerosols.

Note: Every person must use their own bacterial filter and mouthpiece—do not share these.

 

1. Use a nose clip to ensure that the subject is only breathing through their mouth.
2. Connect a disposable bacterial filter and a disposable mouthpiece to the Flow Head of the sensor on the side labeled "Inlet."
3. Hold the Go Direct Spirometer vertically and still during use.

Channels

Go Direct Spirometer has six measurement channels:

• Flow Rate
• Volume
• Adjusted Volume
• Cycle Volume
• Respiration Rate
• Differential Pressure

Flow Rate

This channel reports the flow rate (L/s) of air moving through the flow head. During the ventilation cycle, inhalation will produce negative flow rates while exhalation produces positive flow rates. This channel is active by default when the sensor is connected.

Volume

This channel reports the volume of air (L) passing through the flow head. During the ventilation cycle, inhalation will increase volume while exhalation decreases volume. This channel is active by default when the sensor is connected.

Adjusted Volume

This channel reports the volume or air (L) passing through the flow head. The volume is returned to zero after each ventilation cycle. Use this channel to minimize baseline drift. This channel is not active by default when the sensor is connected.

Cycle Volume

This channel reports the peak volume (L) of each ventilation cycle. Use this channel for long experiments and to minimize baseline drift. This channel is not active by default when the sensor is connected.

Differential Pressure

This channel measures the pressure differential (Pa) across the screen inside the flow head. This channel is not active by default when the sensor is connected.

Respiration Rate

This channel detects inhalations and calculates the number of breaths per minute (BPM). The sample window for the calculation is 30 seconds. The advance interval is 10 seconds. The value will update every 10 seconds. Use this channel for long experiments. This channel is not active by default when the sensor is connected.

Go Direct Spirometer is factory calibrated and should not require calibration by the user.

For the most accurate measurements, we recommend adjusting the volume channel using a 2 L syringe (not included). This is a simple process that takes only a few minutes.

For further calibration information, see www.vernier.com/til/3353

Pressure	Type: Differential Range: ±500 Pa Accuracy: ±1 Pa or 3% of reading Resolution: 0.02 Pa
Flow rate range	±10 L/s
Flow head	Volume: 41 mL Dimensions: 29.5 mm (diameter) × 82 mm (length) Mass: 69 g Construction: ABS plastic
Adjusted volume calculation	Returns volume to zero after each ventilation cycle
Cycle volume calculation	Reports the peak volume for each ventilation cycle
Respiration rate calculation	Sample Window: 30 s Advance Window: 10 s
Wireless specification	Bluetooth 4.2
Maximum wireless range	30 m
Battery	650 mA Li-Poly
Battery life (single full charge)	~24 hours
Battery life (long term)	~500 full charge cycles (several years depending on usage)
Normal operating temperature range	20ºC to 40ºC
Operating humidity range	5–95% (non-condensing)

Every person must use their own bacterial filter and mouthpiece—do not share these.

The flow head is not designed to be removed or sterilized by the user. The flow head can be replaced to extend the life of the product. For more information, contact Vernier Technical Support at support@vernier.com or call 888-837-6437.

The nose clips should be wiped clean between uses and soaked in a mild detergent after each experiment.

Battery Information

Go Direct Spirometer contains a small lithium-ion battery. The system is designed to consume very little power and not put heavy demands on the battery. Although the battery is warranted for one year, the expected battery life should be several years. Replacement batteries are available from Vernier (order code: GDX-BAT-650).

Storage and Maintenance

To store the Go Direct Spirometer for extended periods of time, put the device in sleep mode by holding the button down for at least three seconds. The red LED will stop flashing to show that the unit is in sleep mode. Over several months, the battery will discharge but will not be damaged. After such storage, charge the device for a few hours, and the unit will be ready to use.

Exposing the battery to temperatures over 35°C (95°F) will reduce its lifespan. If possible, store the device in an area that is not exposed to temperature extremes.

Water Resistance

Important: Go Direct Spirometer is not water resistant and should never be immersed in water.

If water gets into the device, immediately power the unit down (press and hold the power button for more than three seconds). Disconnect the sensor and charging cable, and remove the battery. Allow the device to dry thoroughly before attempting to use the device again. Do not attempt to dry using an external heat source.

In the center of the flow head is a plastic screen. As air is forced through the flow head a slight difference in pressure occurs between the front and the back of the screen. A tube in front of the screen and a tube behind the screen pass the pressures to a differential pressure transducer. The greater the airflow passing through the screen, the greater the pressure differential. Airflow rate (L/s) is calculated by applying a factory derived calibration equation to the pressure data. Volume (L) is then calculated by integrating the flow rate (L/s).

• Use a nose clip to ensure that the subject is only breathing through their mouth.
• Hold the Go Direct Spirometer vertically and still during use.
• Use the Adjusted Volume channel if baseline drift in volume is an issue.
• Naturally fitting plastic mouthpieces may give more accurate measurements. For more information see www.vernier.com/til/3409
• Use the Cycle Volume and Respiration Rate channels instead of Flow Rate and Volume channels for long experiments. Do not adjust the sampling rate

For troubleshooting and FAQs, see www.vernier.com/til/4455

If you have followed the troubleshooting steps and are still having trouble with your Go Direct Spirometer, contact Vernier Technical Support at support@vernier.com or call 888-837-6437. Support specialists will work with you to determine if the unit needs to be sent in for repair. At that time, a Return Merchandise Authorization (RMA) number will be issued and instructions will be communicated on how to return the unit for repair.

Item	Order Code
Micro USB Cable	CB-USB-MICRO
USB-C to Micro USB Cable	CB-USB-C-MICRO
Go Direct 650 mAh Replacement Battery	GDX-BAT-650
Disposable Bacterial Filter (pkg. of 10)	SPR-FIL10
Disposable Mouthpiece (pkg. of 30)	SPR-MP30
Noseclip (pkg. of 10)	SPR-NOSE10

Warranty information for this product can be found on the Support tab at www.vernier.com/gdx-spr/#support

General warranty information can be found at www.vernier.com/warranty

The cap is covered by a two-year warranty.

When disposing of this electronic product, do not treat it as household waste. Its disposal is subject to regulations that vary by country and region. This item should be given to an applicable collection point for the recycling of electrical and electronic equipment. By ensuring that this product is disposed of correctly, you help prevent potential negative consequences on human health or on the environment. The recycling of materials will help to conserve natural resources. For more detailed information about recycling this product, contact your local city office or your disposal service.

Battery recycling information is available at www.call2recycle.org

Do not puncture or expose the battery to excessive heat or flame.

The symbol, shown here, indicates that this product must not be disposed of in a standard waste container.