FPO-F1 Pulse Oximeter
The F1 pulse oximeter clips onto a fingertip and displays SpO₂, pulse rate, and perfusion index (PI) on a bright OLED screen. Dual-wavelength optical sensing — 660 nm and 905 nm — supports stable readings even on cold or low-perfusion fingers. If the signal is too unstable to produce an accurate result, the display withholds the reading. App connection helps save records and view trends in the Fondcircle app. Auto power-off after 15 seconds. Runs on two AAA batteries. For adults 18 and older.
Features
Clinically validated SpO₂ accuracy within ±2% — dual-wavelength sensor
PI tracking works even on cold or low-circulation fingers
Bright OLED displays SpO₂, pulse rate, and perfusion index simultaneously
Only shows a reading when the signal is stable — fewer misleading numbers
Up to 24 hours of use on one set of batteries
Sync readings and view trends over time
FDA granted 510(k) clearance
FSA & HSA Payments Accepted
30-day risk-free trial
1-Year Warranty
Pairs well with
FPO-F1 Pulse Oximeter
PreciseOx
Dual-Wavelength Sensing for More Reliable SpO₂ Readings.
The F1 uses 660 nm and 905 nm dual-wavelength optical sensing to measure SpO₂ and pulse rate, with SpO₂ accuracy within ±2% in the 70%–100% range. PI, pulse waveform, and battery status are shown clearly on one screen, so every check gives you the key readings at a glance.
TrueSignal
If the Signal Isn't Stable, You Won't See a Number.
Most oximeters display a value regardless of signal quality. The F1 monitors signal quality automatically — if the waveform is too unstable to produce a reliable result, the display stays blank until you reposition your finger. This means the number you see is one you can trust.
ColdReady
Cold Hands. Low Circulation. Still Gets a Reading.
The F1 tracks Perfusion Index (PI) and continues measuring at PI ≥ 0.3% — a level where many consumer oximeters fail or produce unreliable results. If the signal truly cannot produce a stable reading, the display stays blank rather than showing a number you can't trust.
FondCircle App
Get hospital-level care from home with FondCircle’s tele-health platform and smart devices for accurate, connected health monitoring.
Easy to Track
The ability to view weekly, monthly, or yearly trends gives you an overview of your blood pressure’s evolution.
Insightful trends
The ability to view weekly, monthly, or yearly trends gives you an overview of your blood pressure’s evolution.
Invite Your Family
Invite your family to track together or share your information.
Easy to share
Share your information with family or doctors under your permission.
Stay Connected
to Your Health Records.
Connect supported FondCircle devices, track trends.
Review AI-powered insights, and share reports with the people you trust.
Data Protection
We protect your health.
We also protect your privacy.
The Fondcircle app handles your health data in accordance with HIPAA standards. Your readings stay on your device by default — sharing through CareShare is always initiated by you, and only reaches the people you choose. We do not sell your health data.
Specifications
| Model | FPO-F1 |
| SpO₂ range | 35%–100% |
| SpO₂ accuracy | ±2% (70%–100%) |
| Pulse rate range | 25–250 bpm |
| Pulse rate accuracy | ±2 bpm |
| Perfusion index (PI) | 0–50%; functional at PI ≥ 0.3% |
| Display | OLED, 5-level brightness Shows SpO₂, PR, PI, pulse waveform, battery |
| Power | 2 × AAA batteries (approx. 24 hours cumulative) |
| Auto power-off | 15 seconds after finger removed |
| Operating environment | 10°C–40°C / 50°F–104°F |
| Dimensions | 63.4 × 36.0 × 33.6 mm |
| Weight | 38.1 g (without batteries) |
| For use by | Adults 18 years and older |
What's in the Box
- FPO-F1 pulse oximeter × 1
- 2 × AAA batteries
- Quick start guide
- User manual
FAQs
Please read our FAQs page to find out more.
Who is F1 intended for?
F1 is intended for adults 18 and older. It is not intended for infants or young children.
What does F1 measure?
F1 measures blood oxygen saturation (SpO2), pulse rate (PR), and perfusion index (PI). The OLED screen also shows a pulse waveform and battery status.
What is perfusion index (PI)?
PI reflects pulse signal strength at the fingertip. It can help you understand whether the finger signal is strong enough for a stable reading. PI is informational and does not diagnose circulation problems.
Why might F1 not show a reading?
F1 only shows a reading when the signal is stable enough. Cold fingers, low perfusion, movement, nail polish, poor finger position, or unstable signal can affect measurement. Warm your hand, stay still, and reposition your finger according to the user manual.
Can I use F1 when my fingers are cold?
F1 is designed to support readings on cold or low-perfusion fingers, but finger position and signal quality still matter. If the screen does not show a value, warm your hand, stay still, and try again.
Does F1 connect to the FondCircle App?
Yes. F1 can connect to the FondCircle App to help save SpO2 and pulse readings and review trends over time.
Are F1 readings a medical diagnosis?
No. F1 readings are for informational tracking and do not diagnose medical conditions. If a reading is concerning or does not match how you feel, contact a healthcare professional.