The original Hand Dynamometer was sold until June of 2021. This Hand Dynamometer has grey colored grips. The finger grips are grey and square in shape. The latest version of the Hand Dynamometer (HD-BTA) started shipping in June of 2021. This Hand Dynamometer has teal colored grips and the finger grips are round. Please see the images below. The Go Direct® Hand Dynamometer (GDX-HD) was introduced in 2019.

Go Direct® Hand Dynamometer (GDX-HD)
- This sensor was first sold in 2019 and is currently shipping.
- This Hand Dynamometer has teal colored grips and the finger grips are round.
- Sensor connects via USB or Bluetooth. No interface is required.
- Go Direct Hand Dynamometer Troubleshooting and FAQs
- Specifications and User Guide

Hand Dynamometer (HD-BTA)
- This version of the sensor started shipping in June 2021 and is currently shipping.
- This Hand Dynamometer has teal colored grips and the finger grips are round.
- This sensor requires an interface (e.g., Go!Link, LabQuest Mini, or LabQuest 3).
- Hand Dynamometer Troubleshooting and FAQs
- Specifications and User Guide

Hand Dynamometer (pre-June 2021)
- This version shipped until June 2021.
- This Hand Dynamometer has grey colored grips and the finger grips are square.
- This sensor requires an interface (e.g., Go!Link, LabQuest Mini, or LabQuest 3).
- Hand Dynamometer Troubleshooting and FAQs
- Specifications and User Guide