The following are the different versions of the Go Direct® Soil Moisture Sensor (GDX-SM) that we have sold. Only the most recent version, released in May 2025, supports Remote Data Logging. Because of hardware differences, sensors that do not su...

The following are the different versions of the Go Direct® Weather sensor (GDX-WTHR) that we have sold. Only the most recent version, released in March 2025, supports Remote Data Logging. Because of hardware differences, sensors that do not support...

Specifications and User Guide Troubleshooting General: Press the button on the side of the Go Wireless Optical Heart Rate once to power the sensor on. The green lights should begin to flash. Connect your sensor as described in the Ge...

This issue is specific to the Windows installed version of Graphical Analysis.This issue is most common when updating from v6.2.0 to v6.2.1. What is Happening? When using the update tool within the Graphical Analysis app, the update can fail...

This article is for Graphical Analysis version 6.2.0 or newer.For older versions of the app, see How do I activate Graphical Analysis Pro? Activating Graphical Analysis Pro Follow these steps to activate the pro features of Graphical Analysis ...

The new (May 2025) Variable Load has rotary switches to allow the user to set the resistance to any value from 2 to 200 ohms. It supports up to 300 mA of current, and it has a replaceable 365mA fuse that is 1.5 cm long. A spare fuse is included insi...

Go Direct® Turbidity (GDX-TRB)Specifications and User Guide Troubleshooting Primary Test: place a cuvette of distilled water in the sensor. It should read zero. If it reads anything else, check your cuvette for scratches or fingerprints. ...

The Ladder Experiment Kit (2DFP-LA) is designed to be used with the Go Direct® 2-Axis Force Plate (GDX-FP2D) or 2-Axis Force Plate (FP2D-BTA) to investigate reaction forces at work on a ladder. It is designed to use either the 1.2 or 2.2 m long ...

The "BTA" analog port on the Go Direct® Force Plate (GDX-FP) is designed for the Lateral Force Accessory (2D-FP). When this accessory is connected to the port, you can activate the Lateral Force channel to get sensor data. You can also conn...

The Lateral Force Accessory (2D-FP) is an accessory to the Go Direct® Force Plate (GDX-FP) and the Force Plate (FP-BTA). The minimum software releases are as follows: Graphical Analysis version 6.1 LabQuest 2 LabQuest app version 2.9.1 ...