Senstream Researcher Ring User Guide
  • Senstream User Guide: Intro
  • iOS Mobile App
    • Getting Started
    • Data Storage: Senstream Cloud
    • Data Storage: Local Files Browser
    • Pairing a Ring
    • Record a Live Session
    • Manage your Sessions
    • Ring Detail
    • Settings
  • Charts Web App
    • Getting Started
    • List of Sessions
    • Viewing Session Data
    • View Firmware
    • API Keys
  • Senstream Research Ring
    • Introduction
    • Senstream Research Ring Overview
    • Ring Sensors
    • Ring LED States
    • Charging and Power Management Basics
    • Connectivity
    • Finger Detection
    • Run Times
    • Data Handling
    • Sizing the Ring
    • Cleaning and Care
    • Product Marking
    • Update Firmware
  • Support Contacts
  • Legal
    • Warranty Disclaimer
    • Limitation of Liability
    • Limitations of Use - Not a Medical Device
    • Regulatory Notices
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  1. Senstream Research Ring

Finger Detection

PreviousConnectivityNextRun Times

Last updated 1 year ago

The ring uses the PPG sensor to detect the presence of a finger before enabling operation of the EDA electrodes. This is to prevent the EDA circuit being active and potentially have an external current applied and damaging the circuit. The ring will not stream EDA data without the presence of a finger in close proximity to the PPG window.

The ring’s LED will flash pink indicating that streaming has been disabled since there is no finger present.

The bottom of the ring glows green when the PPG sensor is active and the ring's LED indicator is a solid pink when the EDA path is live and actively streaming data.


Participant Prep

Before putting the ring on a participant and starting a session, it is recommended they wash hands, dry well, and check that hands are not too cold from outdoor activities. Cold hands can affect the quality of the electrodermal activity signal.

Flashing Pink = No finger present
Green light = PPG sensor active
Pink LED = EDA path is live