Pulse OximetersUpdated June 2026

Nonin Model 3230

The Nonin 3230 with its pediatric finger sensor is the most accurate pulse oximeter for children with asthma — critical since children's oximetry is notoriously prone to motion artifact from crying and fidgeting. Nonin's PureLight technology maintains accurate readings in pediatric patients. Bluetooth to the Nonin C…

Connected
Reviewed by
HealthRankings editors
Evidence
Limited
Overall score9.4/10Excellent
Price$299Premium
HSA / FSALikely Eligible
EvidenceLimited
Quick take

What we loved& what to know.

Strengths

  • Pediatric sensor option — accurate for children
  • Nonin PureLight accuracy — best for kids
  • Customizable SpO₂ and HR alarms
  • Bluetooth to Nonin Connect app
  • Used by pediatric nurses
  • Most accurate pediatric oximeter available
  • Higher price
  • Requires separate pediatric probe
  • More clinical than consumer-friendly packaging

Tradeoffs

  • Higher price
  • Requires separate pediatric probe
  • More clinical than consumer-friendly packaging
Real-world usage

Living with the Nonin Model 3230.

Practical considerations for daily operation.

Daily routine

Designed to slot into a typical morning health-check routine without friction.

Learning curve

Plan a short learning curve to get a feel for the device's prompts and ideal positioning.

Maintenance

Keep the unit clean and store it in a dry case to preserve accuracy long-term.

Portability

Best kept on a counter or shelf at home; not engineered for daily commuting.

Manual / offline use

App access unlocks history and trend tracking, but on-device readouts cover daily use.

Hands-on notes

Deep dives.

At a Glance

The Nonin 3230 with its pediatric finger sensor is the most accurate pulse oximeter for children with asthma — critical since children's oximetry is notoriously prone to motion artifact from crying and fidgeting. Nonin's PureLight technology maintains accurate readings in pediatric patients. Bluetooth to the Nonin Connect app with customizable alarms for SpO₂ and heart rate makes it ideal for parents monitoring children during asthma attacks.

How it stacks up

Pulse Oximeters ranked.

The Nonin Model 3230 alongside our top picks in pulse oximeters.

RankDeviceScore
#1
Masimo MightySat Rx
9.6/10Compare →
#2
Nonin Model 3230You’re reading
9.4/10Current
#3
Wellue O2Ring Gen 2
9.0/10Compare →
#4
Oxiline Pulse XS Pro
8.8/10Compare →
#5
Zacurate Pro Series 500DL
8.2/10Compare →
9.4/10
Excellent
HealthRankings verdict

The bottom line

The Nonin 3230 with its pediatric finger sensor is the most accurate pulse oximeter for children with asthma — critical since children's oximetry is notoriously prone to motion artifact from crying and fidgeting. Nonin's PureLight technology maintains accurate readings in pediatric patients. Bluetooth to the Nonin Connect app with customizable alarms for SpO₂ and heart rate makes it ideal for parents monitoring children during asthma attacks.

How we test

HealthRankings buys, tests, and rates devices independently. Our scoring blends quantitative measurements (accuracy vs reference, sample-to-sample variability, fit testing) with everyday usability and cost. We disclose affiliate links and never accept paid placement in our rankings.

Medical disclaimer:Reviews are for general information only and are not medical advice. Always follow your clinician's guidance for diagnosing or treating health conditions. Read full disclaimer