Zacurate 500 Series Pulse Oximeter: full spec sheet and buying guide
The Zacurate 500 Series is one of the most-rated fingertip pulse oximeters on Amazon, with more than 238,000 ratings. It's a simple, affordable way to check blood oxygen and pulse. At the time of writing it holds a 4.6/5 average from more than 238,754 Amazon ratings.
Important: this is general product information, not medical advice. For diagnosis or treatment decisions, talk to your doctor.

Reads SpO2, pulse rate and pulse strength in about 10 seconds on a large LED display, for ages 12 and up, ready to use out of the box.
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How it works
You clip it on a fingertip and, according to Zacurate, it shows blood oxygen saturation (SpO2), pulse rate and pulse strength in about 10 seconds on a large LED display that faces you. A spring system fits a wide range of finger sizes, for ages 12 and above.
In the box and good practice
It includes 2 AAA batteries, a silicone cover and a lanyard, plus a 12-month warranty and US-based phone support. For more reliable readings, stay still, keep your hand warm and remove nail polish. It's useful for sports like climbing or skiing and for general checks at home, but it doesn't replace medical advice.
Strengths based on its spec sheet
- Huge number of positive ratings
- Reading in about 10 seconds
- Ready to use with batteries included
- Affordable
What to consider before buying
- No alarm or waveform, unlike the Innovo iP900AP
- Not for children under 12
- Basic LED display
Want to compare this model with other wearables and health devices? Check out our wearables buying guide.
Who is it ideal for?
Families, athletes at altitude and anyone who wants an easy spot-check of oxygen and pulse at home.
Who is it NOT the best option for?
If you want an alarm and a perfusion index for more detail, the Innovo iP900AP adds them; see our wearables and health guide.
Frequently asked questions
How long does a reading take?
About 10 seconds, according to Zacurate.
Can children use it?
It's designed for ages 12 and up.
Are batteries included?
Yes, 2 AAA batteries, plus a silicone cover and lanyard.

Is the Zacurate 500 Series Pulse Oximeter the right fit for you?
See current price on Amazon