1. Why do the test values vary significantly?

Usage methods and physical conditions can affect the results. Airflow blockage may cause PEF deviations. 1) Did not inhale deeply or exhale forcefully and correctly; 2) Respiratory muscle fatigue; 3) Leakage from the mouth or nose, etc.

2. How to avoid noticeable deviation test value among each tests?

1）Stand or sit upright before testing 2）Take a deep breath in 3）Exhale forcefully and as quickly as possible 4）Seal the mouthpiece tightly 5）Take a short break between tests to avoid fatigue and ensure accurate results

3. E1 occur while using?

Please restart the peak flow meter. If the E1 problem still persists, please get in touch with us. After confirm, we could send you a replacement.

Why can't I connect the device to Bluetooth or Sync data to the App?

This peak flow meter has no Bluetooth and cannot sync data to the 'ePEF' app. Manually log your readings instead.

Why there no backlight red, yellow or green?

This item do not have backlight. There is a triangular pointing to the red, yellow, or green sections for each test result * No arrow will be displayed on the device without properly setting the expected value.

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Nascool Digital Peak Flow Meter,Home Medical with Tracking Software (Manually Recording)-Accurate&Reliable Spirometer for Asthma COPD Adult Kids | Home Medical, PEF & FEV1 Measurement, Risk Indicator, LCD Screen, Accurate & Reliable

Nascool Digital Peak Flow Meter,Home Medical with Tracking Software (Manually Recording)-Accurate&Reliable Spirometer for Asthma COPD Adult Kids | Home Medical, PEF & FEV1 Measurement, Risk Indicator, LCD Screen, Accurate & Reliable

Product ID: 430258128

📊High accuracy & repeatability

📱Integrated asthma tracking app

🩺PEF & FEV1 automatic display

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Description

🌬️ Breathe smarter, live better — your lung health’s new best friend!

SMART HEALTH TRACKING - Sync your respiratory data effortlessly with the dedicated app and asthma diary.
PRECISION YOU CAN TRUST - Pressure differential sensor ensures clinical-grade accuracy without calibration.
COMPACT READY ANYWHERE - Lightweight, portable design fits your busy lifestyle and is easy to clean.
INCLUSIVE USER FRIENDLY - Ideal for adults, kids 6+, athletes, smokers, and anyone managing asthma or COPD.
COMPREHENSIVE RESPIRATORY INSIGHTS - Measures both Peak Expiratory Flow (PEF) and Forced Expiratory Volume (FEV1) for full lung function monitoring.

The Nascool Digital Peak Flow Meter is a compact, highly accurate spirometer designed for home use. It measures key lung function metrics—PEF and FEV1—using a pressure differential sensor that requires no calibration. With an easy-to-read LCD and a companion app for tracking asthma symptoms and medication, it empowers users to monitor respiratory health proactively. Suitable for adults and children over 6, it supports asthma and COPD management with professional-grade reliability.

Specifications

ASIN	B09S3KJZZ7
ASIN	B09S3KJZZ7
Brand	Nascool
Customer Reviews	4.3 4.3 out of 5 stars (618)
Customer reviews	4.3 4.3 out of 5 stars (618)
Date First Available	19 April 2022
Item model number	SMPF-2S
Manufacturer	Nascool
Product Dimensions	5.08 x 4.32 x 10.16 cm; 141 g
Units	1 Count

Reviews

K**D

Good

Nice device

20.06.2026

A**A

device wrong results

i have bought this device for my son he has asthma,It is showing always wrong results and i have tried so many times to connect to my phone but cannot find my phone.... i dont know i think its a waste of money and time i will try to return this device

22.10.2025

F**O

Excellent spirometer

I have now connected this device to my iPhone. This application works extremely well when used in conjunction with this device. I can view the data on my phone and synchronize it to the log page as well as generate charts. It's very useful.

26.05.2026

V**.

Muy bien medidor

Excelente aparato, descargué la app y aunque no se puede conectar x Bluetooth pones la medición y sirve muy bien

24.05.2026

D**Z

Requiero urgente de la factura

El aparato funciona bien, pero requiero una factura para comprobar ante el seguro de gastos médicos pero no puedo generarla. Necesito su ayuda

4.06.2026

A**R

Easy to use.

Easier to use than the “column tube” ones. Easy to store.

28.06.2026

Z**E

No Bluetooth capability

Will not sync to my phone. No Bluetooth capability. I must manually enter. Easy to use and overall good.

14.05.2026

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S/.256

Duties & taxes included

In stock

Sold byAmazon PeruDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Peru.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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