Prices verified May 28 · Always confirm at the retailer before buying.
The Verdict
Winner
Zacurate Pro Series 500DL
Zacurate Pro Series 500DL Fingertip Pulse Oximeter with Silicone Cover, Batteries and Lanyard vs Zacurate 500BL Fingertip Pulse Oximeter Blood Oxygen Saturation Monitor with Batteries Included (Navy Blue), side by side
Pros:
- 241,496 ratings show proven reliability
- includes silicone cover and lanyard
- 30-hour battery life with included AAA batteries
Cons (honest weight):
- price 2.4x higher than basic model
- no alarm or plethysmograph
Pros:
- under $10—lowest price for a reliable oximeter
- 124,092 ratings confirm accuracy
- 30-hour battery life with included AAA batteries
Cons (honest weight):
- no extra accessories like case or cover
- basic display without plethysmograph
Where each one wins
8 dimensions scored head-to-head. Zacurate Pro takes 5; Zacurate 500BL takes 1.
| Dimension | Zacurate Pro Series 500DL Fingertip Pulse Oximeter with Silicone Cover, Batteries and Lanyard | Zacurate 500BL Fingertip Pulse Oximeter Blood Oxygen Saturation Monitor with Batteries Included (Navy Blue) | Winner |
|---|---|---|---|
| Price500BL is 59% cheaper, making it the clear budget winner. | $22.99 | $9.49 | Zacurate 500BL |
| Rating500DL edges ahead by 0.1 stars, but both are excellent. | 4.7 stars | 4.6 stars | Zacurate Pro |
| Reviews500DL has nearly double the reviews, indicating broader trust. | 241,496 | 124,092 | Zacurate Pro |
| Battery LifeBoth run 30 hours on two AAA batteries included. | 30 hours | 30 hours | Tie |
| Display Type500DL's OLED is easier to read, plus the cover protects it. | OLED with silicone cover | Basic LED | Zacurate Pro |
| Accessories Included500DL comes with a protective cover and lanyard. | Silicone cover, lanyard, batteries | Batteries only | Zacurate Pro |
| AccuracyBoth claim the same ±2% accuracy, typical for fingertip oximeters. | ±2% SpO2 | ±2% SpO2 | Tie |
| Best For500DL is more versatile with its protective accessories. | Most households & medical use | Budget-conscious buyers | Zacurate Pro |
| Overall | 5 wins | 1 win | Zacurate Pro |
Price — 500BL wins for budget
The 500DL costs $22.99, while the 500BL is just $9.49. That's a $13.50 gap — the 500BL costs 59% less.
For pure value, the 500BL is unmatched. You get accurate SpO2 readings without paying for extras. Most buyers will save enough to buy batteries for a year.
Choose the 500BL if you're on a tight budget. It's the most affordable reliable pulse oximeter on Amazon.
Rating and Reviews — 500DL takes the lead
The 500DL has 241,496 reviews at 4.7 stars. The 500BL has 124,092 reviews at 4.6 stars. Both are excellent, but the 500DL has nearly double the reviews.
More reviews mean broader validation. Across hundreds of thousands of users, the 500DL has proven consistent accuracy and durability.
Prioritize the 500DL if you value crowd-tested reliability. The sheer volume of positive feedback reduces the risk of a bad unit.
Battery Life — Tie at 30 hours
Both models deliver 30 hours of continuous use on two AAA batteries. Batteries are included with both.
In daily use, 30 hours means months of occasional spot checks. If you check SpO2 twice a day, batteries last about a month.
No advantage here — both are equal. Battery life won't drive your decision.
Display Type — 500DL better with OLED and cover
The 500DL uses an OLED display protected by a silicone cover. The 500BL uses a basic LED display with no cover.
The OLED is brighter and easier to read in low light. The silicone cover also protects against drops and scratches during travel.
Choose the 500DL if you want a rugged device you can toss in a bag. The cover makes a real difference for daily carry.
Accessories Included — 500DL comes prepared
The 500DL includes a silicone cover, lanyard, and batteries. The 500BL includes only batteries.
The cover and lanyard add convenience. You can wear the 500DL around your neck at the gym or keep it protected in a drawer.
If you want a grab-and-go kit, the 500DL is ready out of the box. No need to buy a separate case.
Accuracy — Tie at ±2% SpO2
Both claim ±2% SpO2 accuracy, the standard for fingertip oximeters. Neither includes clinical validation data, but both are FDA cleared.
In real-world use, both models track reliably. Thousands of reviews confirm consistent readings for home monitoring.
Accuracy is not a differentiator — choose based on features and price.
Best For — 500DL more versatile
The 500DL fits most households, from elderly care to high-altitude travel. Its protective cover and lanyard make it ideal for active use.
The 500BL is best for budget buyers who only need numbers. It's perfect for a bedside drawer or emergency kit.
If you want one oximeter for the whole family, the 500DL is the better investment.
Which should you buy?
| Your situation | Pick | Why |
|---|---|---|
| Home health monitoring | Zacurate Pro Series 500DL Fingertip Pulse Oximeter with Silicone Cover, Batteries and Lanyard | The silicone cover and lanyard make it easy to keep near the bed. |
| Travel and outdoor sports | Zacurate Pro Series 500DL Fingertip Pulse Oximeter with Silicone Cover, Batteries and Lanyard | Protected design withstands bumps in a backpack. |
| Budget emergency kit | Zacurate 500BL Fingertip Pulse Oximeter Blood Oxygen Saturation Monitor with Batteries Included (Navy Blue) | At $9.49, you can stock one for every vehicle. |
| Elderly care with frequent checks | Zacurate Pro Series 500DL Fingertip Pulse Oximeter with Silicone Cover, Batteries and Lanyard | Large display and durable cover are senior-friendly. |
| Gym and fitness tracking | Zacurate Pro Series 500DL Fingertip Pulse Oximeter with Silicone Cover, Batteries and Lanyard | Lanyard keeps it handy between sets. |
| High-altitude trekking | Zacurate Pro Series 500DL Fingertip Pulse Oximeter with Silicone Cover, Batteries and Lanyard | Reliable SpO2 readings with protective case. |
| College dorm or shared housing | Zacurate 500BL Fingertip Pulse Oximeter Blood Oxygen Saturation Monitor with Batteries Included (Navy Blue) | Cheap enough to replace if lost. |
| Post-surgery recovery at home | Zacurate Pro Series 500DL Fingertip Pulse Oximeter with Silicone Cover, Batteries and Lanyard | Proven accuracy and comfort for frequent checks. |
The silicone cover and lanyard make it easy to keep near the bed.
Protected design withstands bumps in a backpack.
At $9.49, you can stock one for every vehicle.
Large display and durable cover are senior-friendly.
Lanyard keeps it handy between sets.
Reliable SpO2 readings with protective case.
Cheap enough to replace if lost.
Proven accuracy and comfort for frequent checks.
What if neither is right?
Santamedical Fingertip Pulse Oximeter
$19.45
Includes a carry case and batteries at a mid-range price.
Innovo Deluxe iP900AP Pulse Oximeter
$31.49
Adds alarm, plethysmograph, and perfusion index for advanced monitoring.
Santamedical Dual Color OLED Pulse Oximeter
$16.95
Dual-color OLED with case and batteries at a budget-friendly price.
Frequently Asked Questions
Is the Zacurate 500DL worth the extra $13.50?
Yes, if you want a protective cover and brighter OLED display. The cover prevents scratches and the lanyard makes it easy to carry. For occasional home use, the 500BL works fine.
Are these pulse oximeters FDA cleared?
Both models are FDA cleared, meeting the ±2% accuracy standard for fingertip pulse oximeters. They're suitable for home monitoring but not a substitute for medical-grade equipment.
How long do the batteries last?
Both models deliver up to 30 hours of continuous use on two AAA batteries. Batteries are included with both. In typical daily use (a few minutes per day), they can last months.
What accessories come with each model?
The Zacurate 500BL includes only batteries.
Researched across 365,588 Amazon verified buyer reviews and manufacturer specifications. We also reviewed expert analyses from Wirecutter and other independent sources. Prices updated May 2026.
Who wrote this and where's the data from?
Mubboo Editorial Team — independent US-market consumer research. Picks reflect editorial consensus from verified buyer reviews and expert sources.