That’s a great question! Digital Blood Pressure (BP) apparatus specifications can vary quite a bit between models and brands, but there are several common features and technical specs you can expect.
Here is a general breakdown of the key specifications for a typical digital BP monitor:
Core Technical Specifications
| Specification | Typical Range / Feature | Description |
| Measurement Method | Oscillometric method | The standard, non-invasive technique that senses pressure changes in the artery as the cuff deflates. |
| Measuring Range | Pressure: to mmHg (millimeters of mercury) | The full range of blood pressure values the machine can measure. |
| Pulse: to beats/minute | The full range of heart rates the machine can detect. | |
| Accuracy | Pressure: mmHg or better | The acceptable deviation from a true measurement for blood pressure. |
| Pulse: of reading or better | The acceptable deviation for the pulse rate reading. | |
| Cuff Type/Size | Upper Arm or Wrist | Upper arm is generally preferred for accuracy. Sizes vary (e.g., standard adult cm, large cm). |
| Power Source | DC Battery (e.g., x AA or AAA) | Most are battery-operated for portability. Some also offer an optional AC adapter or Micro-USB power. |
| Display | LCD Digital Display | Shows Systolic, Diastolic pressure, and Pulse rate. |
Common Features & Functions
- Display Readings: Clearly shows Systolic pressure, Diastolic pressure, and Pulse rate.1
- Automatic Operation: Most modern digital monitors are fully automatic, meaning they inflate and deflate the cuff by themselves with a single button press.2
- Memory Function: Stores a number of past readings, often with a date and time stamp (e.g., 3$60$, 4$90$, or more memories for 5$1$ or 6$2$ users).7
- Average Reading: Calculates and displays the average of the last few measurements (typically the last three).
- Irregular Heartbeat Detection (IHD/Arrhythmia): A feature that alerts the user if an irregular heartbeat is detected during the measurement.9
- WHO Indicator: A colored bar or graphical scale on the display that helps classify the blood pressure reading into categories (e.g., normal, pre-hypertension, hypertension) based on World Health Organization guidelines.10
- Auto Power Off: Automatically shuts down after a period of inactivity to conserve battery life.11
- Connectivity (Smart Monitors): Advanced models offer Bluetooth or Wi-Fi connectivity to sync readings with a smartphone app for better tracking and sharing with a doctor.12
