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.

Digital Peak Flow Meter Home Medical With Tracking Software Manually

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

🌬️ Breathe Better, Live Smarter — Your Personal Lung Health Tracker

PRECISION YOU CAN TRUST - Pressure differential sensor ensures ATS ERS WRIGHT standard accuracy—no calibration needed.
TRACK MANAGE LIKE A PRO - Integrated asthma diary app lets you log symptoms, triggers, and medication manually for smarter health decisions.
INCLUSIVE HEALTH MONITORING - Ideal for adults and kids 6+, athletes, smokers, and anyone serious about respiratory wellness.
TRAVEL READY USER FRIENDLY - Durable, pocket-sized design with easy cleaning—perfect for busy professionals on the go.
REAL TIME RESPIRATORY INSIGHTS - Automatically displays PEF and FEV1 for instant lung function feedback.

The Digital Peak Flow Meter by Nascool is a compact, highly accurate spirometer designed for home use by adults and children over 6. Featuring a pressure differential sensor that meets ATS ERS WRIGHT standards, it delivers reliable PEF and FEV1 measurements without calibration. Its portable design is easy to clean and perfect for travel. The included asthma diary app supports manual symptom and medication tracking, empowering users to manage respiratory health proactively.

Reviews

A**R

Just a good peak flow meter

Works fine

7.03.2026

W**D

Great compact device!

As a respiratory therapist, I've used a number of peak flow meters- this one is amazing and great for home use. Small, easy to use and no moving parts. It's easily cleaned and stored, with an easy to read screen. Perfect for travel and carrying to work or school.

2.04.2026

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

D**Y

Easy & accurate.

Easy to set up and appears accurate.

8.03.2026

C**M

Great value

Seems to work well, great value.

27.12.2025

B**R

It works pretty well

It works pretty well for the most part, but sometimes it doesn’t save the results and you have to redo it.

20.01.2026

P**O

Excelente Compra, lo recomiendo 100%

Lo Compré porque es más fácil de utilizar para mi Madre de 87 años y tiene una condición pulmonar y hay que darle terapias. Yo había comprado uno en una Farmacia que resultó ser un poco difícil y dificultoso para ella y este es completamente muy manejable para ella y también para poder guardar sus resultados. Cómodo, Práctico, Útil, Buen Precio y Eficaz. Llegó super a tiempo.

15.03.2026

J**S

Never showed Red, Yellow, or Green like was supposed to

Never showed what color I was at as far as red-not breathing well, yellow-breathing ok but not super great, or green-breathing well. Had to take this one back and buy a new one and new brand of peak flow meter and was super surprised because this product had such high ratings

4.05.2026

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

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COP 252330

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Sold byAmazon ColombiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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Best Sellers Rank	#3,985 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Flowmeters
Customer Reviews	4.3 out of 5 stars 630 Reviews

Digital Peak Flow Meter,Home Medical with Tracking Software Manually Recording-Accurate & Reliable Spirometer for Asthma Adult Kids

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