Blood Volume Pulse (BVP) Sensor | Finger

The Blood Volume Pulse (BVP) Sensor | Finger, developed by Mind Media for the NeXus ecosystem, is a professional, non-invasive sensor designed to acquire information related to relative changes in peripheral blood flow associated with cardiovascular activity.

Using optical Photoplethysmography (PPG) technology with near-infrared light, the sensor detects changes in peripheral blood volume associated with each heartbeat. From this signal, compatible NeXus systems can obtain information related to Heart Rate (HR), Heart Rate Variability (HRV), pulse amplitude, and relative changes in peripheral blood flow.

This combination makes the BVP Sensor particularly suitable for applications involving cardiovascular biofeedback, HRV Training, psychophysiology, human performance, and multimodal physiological acquisition.

PPG – Photoplethysmography Technology

The BVP Sensor uses Photoplethysmography (PPG), a non-invasive optical technology designed to detect relative changes in blood volume within peripheral tissues.

With each heartbeat, blood is pumped through the arteries and blood vessels. These cardiovascular changes modify the volume of blood in the monitored area, producing variations that can be optically detected by the sensor.

The result is a BVP waveform that reflects peripheral blood volume changes associated with cardiovascular activity.

Heart Rate (HR)

The BVP signal can be used to determine Heart Rate (HR).

Each detected pulse wave corresponds to cardiovascular activity associated with a heartbeat, allowing changes in heart rate to be monitored throughout a session.

BVP provides a quick and convenient method for acquiring heart rate and relative peripheral blood flow information. For research applications requiring greater temporal precision in cardiac measurement, ECG/EKG acquisition using an appropriate ExG Sensor may be considered.

Heart Rate Variability (HRV)

In addition to heart rate, the BVP Sensor can be used in applications involving Heart Rate Variability (HRV).

HRV represents the variations in timing between consecutive heartbeats and is frequently incorporated into biofeedback and psychophysiological training protocols.

The BVP signal allows these variations to be monitored and can be combined with respiratory information for dedicated HRV Training applications.

Integration with the Respiration Sensor for HRV Training

One of the key applications of the BVP Sensor is its combination with the Respiration (RSP) Sensor.

While the BVP Sensor monitors peripheral cardiovascular changes and heart rate, the RSP Sensor records the breathing pattern. Simultaneous acquisition of these signals makes it possible to observe the relationship between respiration and heart rate variations, which is particularly useful in HRV Training protocols.

The two sensors can therefore work together as complementary components within the NeXus ecosystem.

Vasoconstriction and Vasodilation

The BVP Sensor also provides information related to relative changes in peripheral blood flow.

Changes in BVP signal amplitude may accompany vasoconstriction and vasodilation of peripheral blood vessels.

Sympathetic activation can lead to constriction of peripheral blood vessels, which may reduce relative blood flow in the monitored tissues. BVP can therefore add an important cardiovascular dimension to psychophysiological protocols.

Non-Invasive Sensor Technology

One of the main advantages of the BVP Sensor is its non-invasive acquisition method.

No adhesive electrodes or complex preparation procedures are required. The sensor uses a finger clip mechanism, allowing quick and simple placement on the user.

This makes it particularly convenient for recurring biofeedback, training, physiological monitoring, and research sessions.

Simple Finger Placement

For signal acquisition, the sensor is typically positioned on the index or middle finger.

The clip mechanism allows the sensor to be quickly attached and removed, simplifying session preparation and providing a practical solution for professional environments.

Proper placement and minimizing unnecessary finger movement can help maintain consistent signal acquisition.

Cardiovascular Biofeedback

The BVP Sensor can be used as a modality for cardiovascular biofeedback.

By transforming peripheral pulse changes into measurable data, the system allows professionals and users to monitor changes in heart rate, HRV, and relative pulse amplitude during different exercises or conditions.

This information can be presented in real time as part of protocols designed to develop greater physiological awareness and self-regulation.

Psychophysiology and Stress Response

Cardiovascular activity is closely related to different regulatory mechanisms within the body.

During periods of increased sympathetic activation, changes may occur in heart rate, heart rate variability, and peripheral circulation. BVP makes it possible to monitor aspects of these responses through changes in the peripheral pulse and relative blood flow.

When combined with other physiological signals, BVP can contribute to a more comprehensive psychophysiological profile.

Multimodal Physiological Acquisition

Within the NeXus ecosystem, the BVP Sensor can be used together with other sensors to record multiple dimensions of physiological activity.

Depending on the NeXus system and configuration, BVP can complement signals such as:

• EEG – brain activity;
• EMG – muscle activity;
• ECG/EKG – cardiac electrical activity;
• GSR/EDA – electrodermal activity;
• RSP – respiration;
• TMP – peripheral temperature.

This multimodal approach allows cardiovascular changes to be analyzed alongside cerebral, muscular, respiratory, thermal, and electrodermal responses within the same session.

BVP and ECG: Complementary Applications

Although BVP provides a convenient, non-invasive method for obtaining heart rate and HRV-related information, its application differs from ECG/EKG-based acquisition.

For situations requiring greater temporal precision in cardiac measurements, particularly certain research applications, ECG/EKG acquired using an appropriate ExG Sensor may be preferred.

BVP and ECG can therefore address different requirements within the same physiological acquisition ecosystem.

Compatibility with NeXus Systems

The Blood Volume Pulse (BVP) Sensor | Finger is available in different versions according to the NeXus system being used.

The standard NeXus version, featuring a brushed metal ODU connector, is designed for compatible systems including:

• NeXus | 10;
• NeXus | Q24;
• NeXus | 4;
• NeXus | 32F.

For the NeXus | Q32, a dedicated BVP Sensor version is available with a black plastic ODU connector.

Selecting the correct sensor version is important to ensure compatibility with the acquisition system.

Designed for Professional Use

In addition to its convenient finger clip mechanism, the standard NeXus version features a brushed metal connector designed to support professional use.

Its straightforward setup makes the sensor suitable for environments where frequent physiological acquisition, training, or research sessions are performed.

Key Features

• Professional Blood Volume Pulse (BVP) Sensor;
• PPG – Photoplethysmography technology;
• Near-infrared optical measurement;
• Non-invasive acquisition;
• Convenient finger clip design;
• Monitoring of relative peripheral blood flow changes;
• Heart Rate (HR) acquisition;
• Suitable for Heart Rate Variability (HRV) applications;
• Monitoring of relative pulse amplitude;
• Information related to vasoconstriction and vasodilation;
• Can be combined with the Respiration Sensor for HRV Training;
• Quick placement on the index or middle finger;
• Professional connector configuration;
• Compatible with NeXus | 10, NeXus | Q24, NeXus | 4, and NeXus | 32F;
• Dedicated version available for NeXus | Q32.

Applications

The Blood Volume Pulse (BVP) Sensor | Finger can be incorporated into applications involving:

• Cardiovascular biofeedback;
• HRV Training;
• Heart rate monitoring;
• Heart Rate Variability;
• Psychophysiology;
• Physiological self-regulation;
• Human performance;
• Behavioral research;
• Scientific research;
• Multimodal physiological acquisition.

Its combination of simple placement, optical acquisition, and integration with NeXus systems makes it possible to incorporate cardiovascular information into a wide range of professional protocols.

BVP as Part of a Psychophysiological Profile

In multimodal configurations, BVP provides cardiovascular information that can complement other physiological parameters.

For example, it can be combined with respiration to observe cardiorespiratory relationships, with GSR/EDA to monitor electrodermal changes, or with peripheral temperature to expand the analysis of circulatory and autonomic responses.

When integrated with other NeXus modalities, BVP contributes to a broader view of physiological changes occurring during different tasks, stimuli, or training sessions.

Simple and Non-Invasive Cardiovascular Acquisition

The Blood Volume Pulse (BVP) Sensor | Finger combines optical PPG technology, a convenient finger clip, and integration with the NeXus ecosystem to provide a practical method for monitoring heart rate, HRV, pulse amplitude, and relative peripheral blood flow changes.

Its integration with the Respiration Sensor expands its capabilities for HRV Training, while compatibility with other physiological modalities enables multimodal biofeedback, psychophysiology, performance, and research protocols.

Blood Volume Pulse (BVP) Sensor | Finger — efficient, optical, and non-invasive acquisition for heart rate, HRV, and peripheral blood flow monitoring.

Contact our team for more information about available versions, NeXus system compatibility, configuration, integration with the Respiration Sensor, accessories, and commercial conditions.