Sensor Bio V2: B2B Raw PPG Platform

AI-ready B2B platform

Sensor Bio describes V2 as infrastructure partners build on, not as a wrist score for one wearer. The company site says its APIs support research pipelines, clinical systems, and AI development, and calls the data a layer for AI and analytics. The Why Sensor Bio deck uses the phrase “AI ready” for that same idea. The concrete layer under the pitch is the S2001 band, the cloud, and the SDK: configurable capture, raw series for enterprise partners, and scores computed on the same export. ChatPPG is describing that public specification and the company’s own overview. This is not a claim that V2 is a cleared diagnostic device or a hosted model.

The V2 product page lists four deployment properties: raw data, one platform (band, cloud, and SDK), white-label branding, and configuration per environment. V2 is sold through partnership, not a consumer checkout. No prescription is required. Sensor Bio names enterprise, defense, and research as the settings partners configure.

Why Sensor Bio, in the company’s words

This section repeats Sensor Bio’s Why Sensor Bio deck. The deck sends readers to Sensor Bio. These lines are company claims. They are not measurements from the V2 product page, and ChatPPG has not independently audited them.

The deck says raw optical readings at 350 per second, and that a typical wearable takes one about every two seconds. The V2 product page specifies sampling at 25, 50, or 100 Hz, with raw export up to 100 Hz. This guide keeps that published S2001 rate. It does not treat 350 per second as the product-page specification.

Under “trusted at scale,” the deck names the American Heart Association, Children’s Hospital Los Angeles, the Gatorade Sports Science Institute, LSU, NIH, Orlando Health, Stanford, and UCLA. That is Sensor Bio’s list. This guide has not checked each relationship. Sensor Bio’s February 2026 announcement separately names Stanford, NASA, and Gatorade as examples of research and enterprise deployments.

The deck says full raw data access through open SDKs and APIs, into a workflow, a dashboard, or an EMR. The science page describes SDK and API access, including EMR and EHR systems. The V2 page documents eight SDK surfaces, interface v0.17.0. Raw waveform export on that page is for enterprise-tier partner accounts. The deck also says administrators can generate API and SDK keys from the console, and it shows an algorithm library spanning cardio, sleep, recovery, stress, and respiratory measures. Those panels are illustrations in the deck.

The deck describes four layers. Capture is research-grade sensing, raw by default, from a screenless wearable: raw PPG, inter-beat intervals, heart rate and HRV, motion and skin temperature, and high-frequency raw export. Connect is the partner’s app, dashboard, or EMR, with an iOS and Android SDK, a cloud API and CSV or JSON, live biometric streaming, and white-label. Build is the partner’s brand and a configurable data model for research and enterprise, which the deck counts as more than 100 configurations. Act is rules and thresholds, alerts, and personalized recommendations.

White-label is also on the V2 product page: the partner’s brand on the hardware, the app, and the reporting. The deck’s configuration panel says sample rate, data cadence, and which sensors are active are set once per organization, and its example is 100 Hz with PPG, motion, and skin temperature. The published sheet is the 25, 50, or 100 Hz choice plus a configurable duty cycle. “100+ configurations” is the company’s count. The product page does not enumerate 100 settings.

Signal Studio on the V2 page notifies by push, email, SMS, or phone, under organization rules. The deck says a trigger can be delivered by push, text, email, or an AI call. Its example is a resting heart rate above 90 bpm held for two nights, notifying a coach. That threshold is the deck’s illustration, not a threshold published on the product page.

The deck lists V2 as available now and Clarity as coming next. It does not give Clarity a sampling rate, a datasheet, or a regulatory status. The current public hardware sheet is the V2 product page.

Highly configurable capture

Sampling defaults to 50 Hz and can be set to 25 or 100 Hz per organization. Duty cycle is configured alongside the sampling rate. Sensor Bio also says capture cadence, the data model, retention, alerting, and reporting are shaped to the deployment. The product page gives a hospital, a base, and a research protocol as examples.

Those settings change what the band can report. Heart rate variability and respiratory rate require PPG sampling of at least 50 Hz. At the 25 Hz setting, only heart rate is available. Continuous high-frequency recording also shortens the on-device buffer, which the product page places at about 14 days under the default duty cycle and from roughly 30 minutes to two weeks depending on settings.

Raw data by default

Raw PPG, inter-beat intervals, and accelerometer data export at up to 100 Hz. Activity, sleep, and recovery scores are computed in the cloud on that series, so a partner can reconstruct a number from the export. Raw waveform export is available to partners on enterprise-tier accounts.

During an active recording, the live stream includes heart rate, HRV, respiratory rate, beat-to-beat intervals, raw PPG, signal-to-noise ratio, and motion. After sync, raw sensor metrics export across a 1 to 7 day window and computed metrics across a 1 to 30 day window, as CSV or JSON, up to 2 GB per file. History retention is configured per deployment. The cloud platform is hosted on AWS.

SDK, APIs, and white-label

The V2 product page describes eight SDK surfaces, compiled from interface v0.17.0. Categories one through seven are fetched from the cloud after sync. The eighth is the live stream during an active recording.

Vitals cover heart rate and HRV, respiratory rate, and the skin-temperature series. Activity covers steps, calories, the activity score, and movement duration. Recovery is the daily readiness score. Sleep includes the score, stages, overnight vitals, and timing. Spot check returns heart rate, HRV as rMSSD and SDNN, mean RR, stress index, respiratory rate, LF, HF, and the LF/HF ratio, Poincaré SD1, SD2, and SD1/SD2, ANS balance, and signal-to-noise ratio in dB. Workouts return average, minimum, and maximum heart rate and time in zone. Profile includes VO2 max, max heart rate, height, weight, stride, and bulk pulls of biometrics, sleep, and steps.

White-label is native: the partner’s brand can carry the hardware, the app, and the reporting. A customizable remote-patient-monitoring dashboard exports raw and derived data. Organization administrators set alert rules in Signal Studio, for example when heart rate crosses a threshold, and can notify by push, email, SMS, or phone. Sensor Bio says consumer-facing high and low heart-rate notifications are not offered.

Signals, scores, and limits

Three sensors are listed: multi-wavelength PPG (green ~530 nm, red ~655 nm, infrared ~940 nm), a three-axis accelerometer (±8 G default, ±16 G maximum, no GPS), and skin temperature from a metal contact plate, stated at ±0.1 °C. Skin temperature is a surface trend, with minimum, maximum, average, uncertainty, and baseline deviation. It is not core temperature.

Heart rate is continuous raw PPG. Sensor Bio states a validated range of 30 to 220 bpm, 1-second samples during active captures, and 1-minute averages otherwise. The export includes raw PPG, IBI, heart rate, and HRV, with filters for motion, a loose band, and tattoos. Heart rate is IBI-based and has no FDA clearance on this page.

HRV is reported when enough IBIs are valid: good signal quality and no motion. It is sampled every 2 minutes through the night, during the day when available, and on spot check. Reported fields include rMSSD, HRV-CV, and a sympathetic-shifted LF/HF ratio. Respiratory rate is derived from the IBI series through respiratory sinus arrhythmia, day or night, under the same valid-IBI rule, and only at 50 Hz or above.

SpO2 is listed as coming soon. A wellness-level range of 85 to 100 percent is planned and is not live. Activity from the accelerometer covers steps, cadence, movement intensity, sleep movement, sleep and activity classification, an activity score, calories, and movement minutes. Cadence and gait are available from the raw accelerometer. Post-exercise heart rate recovery is available from the raw data. Spot checks can report a stress index and autonomic balance: a parasympathetic score from HF and SD1, and a sympathetic score from LF and the LF/HF ratio.

Sleep is auto-detected, without manual logging, from heart rate, HRV, respiratory rate, and movement. Stages are REM, deep, light, and awake. Full REM staging needs sufficient PPG sampling; otherwise the system falls back to light, deep, and wake. Sensor Bio says a partner-defined classification is validated against polysomnography. That is the manufacturer’s statement. This guide does not have an independent epoch-agreement figure for V2.

Cloud scores are 0 to 100. The activity score combines heart rate reserve and movement. The sleep score combines overnight quality and duration. Recovery needs a 5-night baseline and does not currently count naps. Resting heart rate is the lowest sustained heart rate during sleep. Resting HRV is nocturnal rMSSD from the lowest-activity part of sleep.

Sensor Bio V2 vs Polar 360

Sensor Bio publishes a specification comparison with the Polar 360. The Sensor Bio column below follows the V2 product specification (model S2001). The Polar column follows only what that comparison page states about Polar 360. This is not an independent head-to-head trial, and it does not add accuracy metrics.

Scroll sideways to compare both devices.

Sensor Bio cells follow the V2 product specification. Polar cells follow Sensor Bio’s public comparison page. Polar sampling rate and LED wavelengths are not stated on that page. ChatPPG’s Polar guide and Polar vs Garmin page cover other Polar products. They are not a trial of V2 against the Polar 360.

• Polar wearable guide
• Polar vs Garmin

V2 specification

The rows below are the public V2 specification: the product page and Sensor Bio’s specification matrix for model S2001. Manufacturer statements are labeled as such. They are not independent validation.

Model S2001, from Sensor Bio’s V2 product page. Manufacturer statements, not an independent test.

Biostrap lineage and independent studies

Sensor Bio’s February 19, 2026 announcement says the company was founded in 2016 as Biostrap and was formerly known as Biostrap. The same note says the company was seeing demand for V2 and V3 devices. It does not publish a V3 hardware sheet. The continuity page directs former Biostrap users to Sensor Bio for support.

Sensor Bio’s science page describes PPG as the source of heart rate, heart rate variability, and respiratory rate, and says researchers can access raw and processed PPG and accelerometer data through the remote-monitoring dashboard. The same page also names a gyroscope in the platform description. The V2 hardware specification lists PPG, a three-axis accelerometer, and skin temperature.

Independent Kairos results are not V2 trials. Flatt et al. 2025 compared the Biostrap Kairos wristband with ECG at rest in young adults, supine (n = 32) and seated (n = 30). Resting heart rate showed excellent agreement. HF, LF, and SD2 showed poor agreement. SDNN had the strongest HRV agreement, then SD1 and RMSSD. Errors grew at higher HRV values. The authors limited recommended HRV use to SDNN for global variability and SD1 or RMSSD for parasympathetic activity.

Shah et al. 2026 had 12 people with sickle cell disease and 6 healthy controls wear a Biostrap wristband nightly, producing 131 recordings. Three of the six controls also wore a fingertip PPG sensor (9 nights). Overnight PPGampCV from the wristband correlated with the fingertip sensor on all 9 nights (r 0.24 to 0.7).

• Biostrap research record
• Sensor Bio V2 research record
• HRV wearable guide
• Autonomic testing note