Rossmax PF120 Series Peak Flow Meter vs Micro Direct MicroPeak - Clinical Comparison

Name: Micro Direct MicroPeak
Brand: Micro Direct
Price: 24.95 USD
Rating: 90

Compare Rossmax PF120 Series Peak Flow Meter and Micro Direct MicroPeak side-by-side with clinical performance scores, FDA status, pricing, and expert recommendations

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Rossmax PF120 Series Peak Flow Meter

88 /100

Micro Direct MicroPeak

90 /100

+2% higher overall score

Rossmax PF120 Series Peak Flow Meter

Rossmax

Score

Price

$20

Evidence

Strong

Buy Now Full Review

Top Rated

Micro Direct MicroPeak

Micro Direct

Score

Price

$25

Evidence

Strong

Buy Now Full Review

Performance Metrics

Rossmax PF120 Series Peak Flow Meter

Micro Direct MicroPeak

Performance Metrics

Rossmax PF120 Series Peak Flow Meter

Micro Direct MicroPeak

Measurement Accuracy

Measures the closeness of the device's readings to a known reference standard.

Adheres to EN ISO 23747:2009 requirements with a validated accuracy of ±10 L/min or ±10%, providing reliable tracking of airway obstruction trends.

Individually calibrated at the factory to meet ATS standards, providing reliable PEF readings with a resolution of 10 L/min.

+2% better measurement accuracy

Measurement Accuracy

Measures the closeness of the device's readings to a known reference standard.

+2% better

Ease of Use

Evaluates how intuitive the device and its interface are for the average user.

Simple mechanical operation with high-contrast markings and a smooth sliding indicator that is easy for patients of all ages to read and reset.

Simple 'one-size-fits-all' design with high-contrast markings; the reset slider is ergonomic and simple for children to operate.

Ease of Use

Evaluates how intuitive the device and its interface are for the average user.

Build Quality

Assesses the durability, materials, and physical design of the device.

Constructed from robust, medical-grade ABS plastic that is fully washable and resistant to daily wear and tear.

Constructed from high-impact medical-grade polymers with a non-removable internal mechanism designed to maintain integrity without dismantling.

+3% better build quality

Build Quality

Assesses the durability, materials, and physical design of the device.

+3% better

Value for Money

Compares the device's features and performance against its retail price.

Offers medical-grade precision and a dual-model range at an exceptionally competitive price point, making it highly accessible for broad patient populations.

One of the most cost-effective medical-grade monitors available, offering professional accuracy without the maintenance costs of electronics.

Value for Money

Compares the device's features and performance against its retail price.

Clinical Efficacy

Rossmax PF120 Series Peak Flow Meter

Micro Direct MicroPeak

Clinical Efficacy

Rossmax PF120 Series Peak Flow Meter

Micro Direct MicroPeak

Peak Flow Accuracy

Measures the precision of Peak Expiratory Flow rate readings.

Meets international standards for peak flow measurement fidelity, with minimal frequency response profiles of less than 15 L/min difference.

Meets all international performance standards for peak flow meters, with accuracy validated across 26 distinct flow-time profiles.

+2% better peak flow accuracy

Peak Flow Accuracy

Measures the precision of Peak Expiratory Flow rate readings.

+2% better

Measurement Repeatability

Assesses the consistency of results across multiple identical maneuvers.

Repeatability is guaranteed within ± 5 L/min or ± 5% of readings, ensuring consistent tracking over multiple daily tests.

Demonstrated repeatability of less than +/- 2% in bench tests, ensuring that observed changes in patient data reflect actual physiological shifts.

+6% better measurement repeatability

Measurement Repeatability

Assesses the consistency of results across multiple identical maneuvers.

+6% better

Effort-Dependent Sensitivity

Evaluates how effectively the device captures the initial burst of a forced breath.

The spring-piston mechanism is responsive to rapid exhalation spikes, accurately reflecting the user's maximal expiratory effort.

The spring-piston mechanism is critically damped at 350 L/min to provide a stable reading that accurately reflects the maximum expiratory effort.

+5% better effort-dependent sensitivity

Effort-Dependent Sensitivity

Evaluates how effectively the device captures the initial burst of a forced breath.

+5% better

Asthma Zone Management

Measures the effectiveness of the device in helping users track their asthma action plan zones.

Features physical, adjustable sliding markers for Green, Yellow, and Red zones that stay securely in place during use.

+10% better asthma zone management

Features adjustable color markers (Green, Yellow, Red) that are physically integrated into the scale housing to prevent loss or wear.

Asthma Zone Management

Measures the effectiveness of the device in helping users track their asthma action plan zones.

+10% better

Specifications

Specification	Rossmax PF120 Series Peak Flow Meter	Micro Direct MicroPeak
Price	$20	$25
FDA Status	FDA 510(k) Cleared	FDA 510(k) Cleared
Clinical Evidence	Strong Clinical Evidence	Strong Clinical Evidence
Clinical Recommendation	Highly Recommended	Highly Recommended

Value for Money

88 score / $20

451.3

value score

25% better value

90 score / $25

360.7

value score

Value score = Performance score ÷ Price × 100

Rossmax PF120 Series Peak Flow Meter

Strengths

✓ Dedicated models for adults (PF120 A) and children (PF120 C) ensure optimal flow range resolution.
✓ Meets rigorous EN ISO 23747:2009 and CE standards for medical devices.
✓ Fully washable and reusable housing for superior hygiene and cost-efficiency.
✓ Highly portable, lightweight design (approx. 50g) suitable for carry in pockets or bags.
✓ Includes a tracking diary to support manual longitudinal data logging.

Limitations

× Purely mechanical device with no internal memory or automatic digital syncing.
× Lacks the ability to measure Forced Expiratory Volume (FEV1).
× Requires manual record-keeping which may reduce adherence for some users.

Micro Direct MicroPeak

Strengths

✓ In-built one-way check valve prevents cross-infection.
✓ Broad measurement range from 60 to 900 L/min.
✓ High-visibility scale with clear 10 L/min increments.
✓ Durable construction requires no dismantling for maintenance.
✓ Movable asthma management zones that won't wash off.

Limitations

× Lacks the digital memory and data logging of electronic models.
× No FEV1 measurement capability.
× Relies entirely on manual record-keeping in paper journals.

Expert Review Summary

Our clinical assessment and verdict for each device

Rossmax PF120 Series Peak Flow Meter

Highly Recommended

"The Rossmax PF120 Series offers a highly reliable and cost-effective mechanical solution for daily asthma and COPD management across all age groups."

The Rossmax PF120 Series, comprising the PF120 A (Adult) and PF120 C (Child) models, represents a standard of precision in mechanical respiratory monitoring. These Class II medical devices are engineered to measure Peak Expiratory Flow Rate (PEFR) using a time-tested spring-and-piston mechanism. The PF120 A features a measurement range of 60-800 L/min BTPS, while the PF120 C is tailored for pediatric users with a 50-400 L/min BTPS range. A key technical advantage is the built-in flexible three-zone management system, which uses adjustable color-coded indicators (Green, Yellow, Red) to help patients track their respiratory status against their personal best. The devices comply with the EN ISO 23747:2009 standard, ensuring accuracy within ± 10 L/min or ± 10% of the reading. Constructed from washable medical-grade ABS plastic, the series is designed for long-term durability and hygiene. While purely mechanical and lacking digital data logging, the PF120 Series remains a benchmark for affordable, reliable home monitoring in 2026.

Strong Clinical Evidence

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Micro Direct MicroPeak

Highly Recommended

"The MicroPeak is a rugged, highly accurate mechanical meter that sets the clinical benchmark for non-electronic respiratory monitoring."

The Micro Direct MicroPeak is a professional-grade mechanical peak flow meter designed to meet the rigorous performance requirements of both the American Thoracic Society (ATS) and European standards (EN13826). Manufactured by Micro Medical Ltd and fabricated by Fyne Dynamics, it utilizes a precision-calibrated internal spring and piston mechanism. A standout engineering feature is the in-built internal check valve, which ensures that air can only be expired into the device, effectively preventing cross-infection-a critical safety feature in multi-patient clinical environments. The device features a large, high-visibility scale that provides clear resolution from 60 to 900 L/min, making it suitable for a broad spectrum of patients from pediatrics to high-flow athletes. Clinical performance data indicates that the device maintains an accuracy of within +/- 5% to 10%, depending on the specific scale used, with exceptional longitudinal repeatability. The inclusion of movable asthma management color zones that do not wash off further enhances its utility for daily patient self-management.

Strong Clinical Evidence

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Where to Buy

Verified purchase options and current availability

Rossmax PF120 Series Peak Flow Meter

Top Choice

$20 MSRP

eBay

$32.89

3-5 business days

Shop

Manufacturer Site

HSA/FSA: Usually Eligible

Micro Direct MicroPeak

$25 MSRP

No retailer information available

Manufacturer Site

HSA/FSA: Usually Eligible

Important Purchase Considerations

• Prices shown are current as of the last update and may vary. Always verify pricing at the retailer's website.
• Some medical devices may require a prescription. Check with your healthcare provider before purchasing.
• Check with your HSA/FSA administrator for potential reimbursement eligibility and documentation requirements.
• Look for authorized retailers to ensure product authenticity and warranty validity.