- A pulse oximeter measures blood oxygen saturation (SpO2) and pulse, non-invasively, in seconds.
- For most healthy adults a normal resting SpO2 reading is roughly 95–100%.
- Fingertip units are the fast, affordable choice for clinics, care homes and first-aid kits.
- Buying in bulk drops the per-unit price dramatically.
Few medical devices earn their keep like a pulse oximeter. Clip it on a finger, wait a few seconds, and you have two vital numbers — blood oxygen saturation (SpO2) and pulse rate — without a needle, a cuff or a consumable in sight. Since 2020, they have gone from a clinical tool to something every care setting (and many households) keeps within reach.
How it works, in one paragraph
A pulse oximeter shines two wavelengths of light — red and infrared — through the fingertip. Oxygen-rich and oxygen-poor blood absorb these wavelengths differently, and the sensor uses that difference to estimate what percentage of your haemoglobin is carrying oxygen. That percentage is your SpO2. For most healthy adults, a normal resting reading sits around 95–100%; persistently lower readings warrant clinical attention.
Who actually needs one (or fifty)
GP surgeries and clinics use them at triage and in routine obs. Care homes use them for resident monitoring and escalation decisions. Occupational health, first-aid teams, event medics, home-care providers and respiratory patients all keep them on hand. That is why we stock them both as singles and in bulk.
What to look for when buying
For fingertip units, the practical checklist is short: a clear display, sensible battery life, a build that survives being dropped in a busy clinic, and honest sourcing. Two habits improve readings in use: warm hands (cold fingers reduce perfusion and can under-read) and removing nail polish on the measured finger.
The bottom line
At a few pounds per unit bought in bulk, pulse oximeters are the cheapest clinical capability you can add this week. Browse the pulse oximeters collection for singles and bulk boxes.
Message us on WhatsApp at +44 7392369111 or use our contact page — we ship UK and worldwide, tracked and insured.
This article is general guidance, not clinical advice. Pulse oximeter readings should be interpreted by a qualified professional; seek medical advice for persistently low readings.