The Certeza BM-307 is a fully automatic wrist-type blood pressure monitor that provides convenient, accurate blood pressure and pulse measurement directly on the wrist — without an arm cuff. Designed for ease of use at home, it features one-touch operation, a large LCD display, and a comprehensive feature set including 2×60 memory, hypertension detection, and irregular heartbeat indication.
The wrist cuff fits circumferences of 13.5 to 21.5 cm, covering a wide range of adult wrist sizes. The device supports two users with 60 memory spaces each (120 readings total), all stored with date and time stamps. Averaging the last 3 readings provides a more representative assessment of blood pressure at any given session. Automatic shut-off, error signals for incorrect application, and a low battery indicator make daily use simple and reliable.
Why Choose Certeza Blood Pressure Monitor
- Wrist-Type Design: Convenient alternative to upper arm cuffs — quick to apply and comfortable for regular use.
- One-Touch Operation: A single button press initiates automatic inflation, measurement, and deflation.
- Large LCD Display: Clear, easy-to-read screen shows systolic, diastolic, and pulse results simultaneously.
- 2×60 Memory (120 Total): Stores 60 readings per user for two users, each with date and time stamps.
- Average of Last 3 Readings: Automatically calculates the average of the 3 most recent readings for a more accurate assessment.
- Hypertension Indicator: Visual alert flags readings that exceed the hypertension threshold.
- Irregular Heartbeat Indicator: Detects and flags irregular pulse patterns during measurement.
- Date and Time Function: Records the date and time of every measurement.
- Error Signal: Alerts the user if the cuff is incorrectly applied or if the measurement is affected by movement.
- Auto Shut-Off: Automatically powers off after measurement to conserve battery.
- Low Battery Indicator: Warns when battery replacement is needed.
- Fits 13.5–21.5 cm Wrists: Suitable for most adult wrist sizes.
Product Specifications
| Brand | Certeza |
| Model | BM-307 |
| Type | Automatic Wrist Blood Pressure Monitor |
| Measurement Method | Oscillometric |
| Wrist Circumference | 13.5–21.5 cm |
| Display | Large LCD |
| Memory | 2×60 readings (120 total) with date and time |
| Averaging | Average of last 3 readings |
| Indicators | Hypertension, irregular heartbeat, error signal, low battery |
| Operation | One-touch automatic |
| Auto Shut-Off | Yes |
| Power Source | Battery-operated |
Usage Instructions
- Sit quietly for at least 5 minutes before measuring. Rest your arm on a flat surface.
- Place the wrist monitor on your left wrist, approximately 1–2 cm above the wrist bone. The display should face upward.
- Raise your wrist to heart level — this is important for accurate wrist readings.
- Press the START button once. The cuff inflates and measures automatically. Remain still during measurement.
- The result appears on the display. Check the hypertension and irregular heartbeat indicators alongside your reading.
- Press MEMORY to review stored results. Measure at the same time each day for consistent tracking.
Warnings and Precautions
- For home monitoring only — not a substitute for professional medical diagnosis or treatment.
- Wrist-type monitors are sensitive to wrist position during measurement. Always hold the wrist at heart level for accurate results.
- Not recommended as a primary monitoring device for patients with atrial fibrillation or significant arterial stiffness — consult your doctor.
- The hypertension and irregular heartbeat indicators are awareness alerts only — not medical diagnoses.
- Always consult a healthcare professional to interpret readings and manage blood pressure.
Frequently Asked Questions
Are wrist blood pressure monitors as accurate as upper arm monitors?
Wrist monitors can produce accurate readings when used correctly — particularly when the wrist is held at heart level during measurement. Upper arm monitors are generally considered the clinical standard and may be more accurate for patients with atrial fibrillation, arterial stiffness, or very high blood pressure. For home monitoring in healthy adults, a validated wrist monitor used correctly provides reliable results. Consult your healthcare provider if unsure.
Why do I need to hold my wrist at heart level?
Blood pressure readings taken at the wrist level are sensitive to the height of the measurement point relative to the heart. If the wrist is held below or above heart level during measurement, hydrostatic pressure differences can add or subtract from the reading, causing inaccurate results. Always keep the wrist at heart level when the cuff is inflating.
How many readings does the BM-307 store?
The BM-307 stores 60 readings per user for 2 users — 120 total — each with a date and time stamp for tracking trends and sharing with your healthcare provider.
What wrist size does this monitor fit?
The BM-307 cuff fits wrist circumferences of 13.5 to 21.5 cm — covering most adult wrist sizes. Measure your wrist circumference before purchase to confirm fit.








Reviews
There are no reviews yet.