The Best Pulse Oximeters in the UK

What is a Pulse Oximeter?

Pulse Oximeters are one of the most commonly used non-invasive monitoring devices in clinical medicine. Initially introduced in the mid-1980s, it is now used widely for congenital heart disease and delivery room resuscitation. 

Monitoring the oxygenation of a person can be imperative for treating those with health conditions such as asthma, pneumonia and lung cancer. The demand for Pulse Oximeters increased significantly as an effect of COVID-19.

Numed Healthcare offers a comprehensive range of high performance Pulse Oximeters from leading brands, such as Merlin Medical and Nonin. Here, we’ve highlighted each machine's price and features. So you can compare products with ease and make the best possible purchase for you or your practices’ needs. 

  1. Merlin M-Pulse Finger Pulse Oximeter

Technical Specifications:

  • SpO2 Range: 0 to 99%
  • SpO2 Resolution: ± 2% (80% to 99%) or ± 3% (70% to 80%)
  • Pulse Range: 0 to 254 bpm
  • Pulse Accuracy: ± 2 bpm or 2%

Purchasing Information:

About the M-Pulse Finger Oximeter

Choose the M-Pulse Oximeter from Merlin Medical for quick, on the spot SpO2 and Pulse Rate testing.

This pulse oximeter will fit snugly in your pocket or bag thanks to its lightweight and small size, making it the perfect choice for testing on the go. The size dimensions are: 58 x 32 x 34mm and weighs 50g including batteries. 

This has a universal finger clip that will fit a range of finger sizes from 8mm to 26mm, meaning it can be used on virtually anyone. The M-Pulse Oximeter also benefits from an automatic switch off after 8 seconds of your finger being removed. 

You can choose how you would like the results to be featured on the screen with a unique “display rotation” feature, giving you 6 options. You will see the SpO2, pulse rate and pleth waveform displayed on the OLED screen. There are also 10 brightness levels on the M-Pulse oximeter, allowing you to read the display screen in any lighting conditions. 


  • Low-energy, long-life OLED display
  • SpO², Pulse Rate & Pleth Waveform
  • 10 brightness levels
  • 6 display modes
  • Adjustable illumination
  • 10 brightness levels
  • Auto power off
  • One button operation
  • Suitable for adults, children and neonates
  • Simple and convenient operation
  • Low power consumption
  • Requires 2 AAA batteries (supplied)
  • Approximately 30 hours of battery life
  • 1 year warranty

2. Nonin 9590 Onyx Vantage Finger Pulse Oximeter 

Technical Specifications:

  • SpO2 range: 0 - 100%
  • Pulse range: 18 - 321 bpm
  • Pulse accuracy: ± 3 digits

Purchasing Information:

About the Nonin 9590 Onyx Vantage Finger Pulse Oximeter

This high-performance finger pulse oximeter for professional use with high accuracy levels as scientifically proven. The Nonin 9590 Vantage Finger Pulse Oximeter Complies with the International Standard for Pulse Oximeters and is ISO 9919:2009 Compliant. 

This is the only finger pulse oximeter which can also be used on thumbs and toes with the same levels of accuracy, making it a perfect choice for use on a range of patients.

For ease of use, the device will turn on automatically when a finger is inserted and turn off once removed. 

The longevity of the Nonin 9590 Onyx Vantage is useful for repeated use, with 36 hours of continual use or 6,000 checks. The device runs on two AAA batteries which are included with the purchase. 

In the box, there is also a lanyard and cushioned carry case, making it easy to keep on your person for repeated use. This is a compact device with dimensions of 359 x 330 x 323mm. At only 60g, it’s light enough to wear around your neck with the lanyard without being disruptive to your day-to-day work. 

Benefit from the 5 year warranty which features a “drop inclusive” policy. The device is fully serviceable and repairable even after this 5 year warranty expires.

There is no need for manual light calibration as the clear LED screen can easily be read in any light level. 


  • Patented auto ON/OFF when finger is inserted/removed for easy operation
  • Clear LED display can be read in any environment and in any light
  • Compact and lightweight - weighs only 60g
  • No maintenance or recalibration required
  • Easily positioned on fingers from a small child to large adult (8mm - 26mm finger thickness)
  • Unique pulse quality indicator which offers a fast and simple "Green is Good" assessment of the signal quality
  • Fully serviceable and repairable even after expiry of the 5 year 'Drop Inclusive" warranty
  • 36 hour battery operating life - 6000 spot checks from 2xAAA batteries
  • ISO 9919:2009 Compliant - Complies with the International Standard for Pulse Oximeter

3. Merlin M-Pulse Lite Finger Pulse Oximeter

Technical Specifications:

  • SpO2 range: 70 to 99%
  • SpO2 accuracy: ±2% (80 to 99%), ±3% (70 to 79%)
  • Pulse rate range: 30 to 235 bpm
  • Pulse rate accuracy: ±2% or 2 bpm

Purchasing Information:

About the Merlin M-Pulse Lite

The Merlin M-Pulse Lite fingertip pulse oximeter builds on the success of the Merlin M-Pulse Oximeter to deliver a product that represents even better value for money.

The M-Pulse Lite is very easy to operate oximeter featuring one-button control.  Its long battery life and compact size make it an excellent choice for on-the-spot O2 and pulse rate measurements.


  • LED display
  • Displays SpO2, pulse rate and bar graph
  • Pulse rate bar graph display
  • Low power consumption
  • Auto power off
  • One button control
  • Universal finger clip suitable for adults and children
  • Approximately 30 hours of battery life
  • Lightweight and portable
  • Requires 2 x AAA batteries (supplied)
  • 1 year warranty

4. Merlin M-Pulse Paediatric Finger Pulse Oximeter

Technical Specifications:

  • SpO² Range: 70 - 99%
  • SpO² Accuracy: 80 - 99, ± 2% : 70 - 79, ± 3%
  • Pulse Rate Range: 30 - 235 BPM
  • Pulse Rate Accuracy: ± 2BPM or ± 2%

Purchasing Information:

About the Merlin M-Pulse Paediatric Finger Pulse Oximeter 

Specifically designed for paediatric use with a smaller fingertip dimension than other pulse oximeters, the Merlin Medical M-Pulse Paediatric Finger Pulse Oximter is one of the most compact devices of its type available.

Weighing just 35g including its 2 AAA batteries (supplied), the M-Pulse Paediatric features a low-energy, highly legible OLED display with 10 brightness levels for use in virtually any environment.

The oximeter features 6 display modes and measures and shows SpO2, pulse rate and pleth waveform.


  • Suitable only for paediatric use
  • SpO2, pulse and pleth measurements
  • Clear OLED display
  • 6 display modes
  • 10 brightness levels
  • Auto power off
  • One button operation
  • Requires 2 AAA batteries (supplied)
  • Up to 30 hours of battery life
  • 1 year warranty

Contact Us

To discuss your specific needs in more detail, please contact us using this form or by using one of the methods below:

Call: 0114 2433896