The Certeza PO-907 is a medical-grade fingertip pulse oximeter that provides accurate, non-invasive measurement of arterial oxygen saturation (SpO2) and heart rate (pulse). Suitable for home use, travel, high-altitude sports, and monitoring of conditions such as asthma, chronic bronchitis, and heart failure, it delivers reliable readings through an advanced DSP (Digital Signal Processing) algorithm that maintains accuracy even under low perfusion conditions (as low as 0.2%).
A rich colour OLED display offers 6 display modes and a large font option for clear visibility. A pulse curve (plethysmographic waveform) is displayed in real time alongside the numeric readings. Adjustable audio and video alarm functions alert the user when SpO2 or pulse falls outside set thresholds. Anti-shaking functionality filters out motion artefacts for more stable readings during light movement. The device automatically powers off after a period of inactivity. Two AAA batteries are included, along with a carrying pouch and strap for convenient daily carry.
Why Choose Certeza Pulse Oximeter
- Advanced DSP Algorithm: High-accuracy Digital Signal Processing maintains reliable SpO2 and pulse readings even under low perfusion (0.2%) — better performance than basic pulse oximeters in low-circulation conditions.
- Colour OLED Display: Vibrant, high-contrast display with 6 display modes and large font option for clear readability in various conditions.
- Pulse Curve Display: Real-time plethysmographic waveform display alongside numeric readings for visual confirmation of signal quality.
- Audio and Video Alarm: Adjustable alarms trigger when SpO2 or pulse rate falls outside user-set thresholds.
- Anti-Shaking Function: Filters motion artefacts for more stable, reliable readings during mild movement.
- SpO2 Range 70–100%: Covers the full clinically relevant oxygen saturation range.
- Pulse Range 30–250 bpm: Broad pulse measurement range suitable for athletic and clinical use.
- Suitable for Multiple Use Cases: Home monitoring, travel, high-altitude sports, and management of respiratory and cardiac conditions.
- Auto Shut-Off: Conserves battery by powering off automatically after inactivity.
- Complete Kit: 2 × AAA batteries, carrying pouch, and carrying strap included.
Product Specifications
| Brand | Certeza |
| Model | PO-907 |
| Type | Fingertip Pulse Oximeter |
| SpO2 Measuring Range | 70% to 100% |
| Pulse Measuring Range | 30 to 250 beats/min |
| Low Perfusion Support | 0.2% |
| Algorithm | Advanced DSP (Digital Signal Processing) |
| Display | Colour OLED — 6 display modes, large font option |
| Pulse Curve | Yes — real-time plethysmographic waveform |
| Alarms | Adjustable audio and video alarm |
| Anti-Shaking | Yes |
| Auto Shut-Off | Yes |
| Battery | 2 × 1.5V AAA (included) |
Usage Instructions
- Install 2 × AAA batteries in the battery compartment.
- Insert the index or middle finger fully into the clip until it reaches the sensor at the end.
- The device powers on automatically when a finger is inserted.
- Hold still and wait for the SpO2 and pulse rate readings to stabilise on the display — typically within a few seconds.
- Note the readings alongside the pulse curve waveform. If alarms are set, they will sound if readings fall outside the threshold.
- Remove finger to power off, or the device will shut off automatically after inactivity.
Warnings and Precautions
- For monitoring purposes only — not a diagnostic device. Always consult a healthcare professional for medical interpretation of readings.
- Nail polish, dark pigmentation, or false nails can affect SpO2 reading accuracy — remove nail polish where possible.
- Excessive movement can cause inaccurate readings despite the anti-shaking function — remain as still as possible during measurement.
- If SpO2 readings are consistently below 95%, consult a healthcare professional promptly.
- Keep out of reach of children.
Package Contents
- 1 × Certeza PO-907 Fingertip Pulse Oximeter
- 2 × AAA batteries
- 1 × Carrying Pouch
- 1 × Carrying Strap
- 1 × User Manual
Frequently Asked Questions
What is low perfusion support and why does it matter?
Low perfusion refers to reduced blood flow through the finger — which can occur in cold environments, in patients with cardiovascular conditions, or during certain medications. Many basic pulse oximeters struggle to take accurate readings at low perfusion. The PO-907’s DSP algorithm maintains reliable readings down to 0.2% perfusion index, making it more suitable for patients with poor peripheral circulation.
What are the 6 display modes?
The colour OLED display supports 6 display modes that change the layout and orientation of the SpO2, pulse rate, and pulse curve information on screen — allowing the user to choose the format that is most readable for their usage context (e.g. landscape, portrait, or alternative layouts).
Can I use this during sports or exercise?
Yes. The PO-907 is suitable for high-altitude sports and active monitoring. The anti-shaking function helps reduce motion artefacts during mild movement. For continuous monitoring during vigorous exercise, results may still be affected by strong motion — remain as still as possible during spot-check readings.
What alarms does the PO-907 have?
The PO-907 features adjustable audio (sound) and video (visual/display) alarms that trigger when SpO2 or pulse rate falls below or above user-set thresholds. Alarm levels can be adjusted in the device settings.






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