## Common ground
All options are electronic devices designed to measure and track heart rate.
## Options at a glance
**9018.19 – Hospital/professional use**
- **Defining trait:** Intended for clinical or medical settings, not general consumer use.
- **Typical examples:** ECG monitors in hospitals, wearable devices used by surgeons during procedures.
- **Best fit when:** Used in regulated medical environments with clinical oversight.
**9029.20 – Tachometer type (beats per minute)**
- **Defining trait:** Measures heart rate solely as beats per minute, typically without additional health metrics.
- **Typical examples:** Basic pulse monitors, handheld devices for quick BPM checks.
- **Best fit when:** Only BPM tracking is needed, no fitness or sleep data.
**9031.80 – Wearable fitness trackers (multi-function)**
- **Defining trait:** Multi-sensor wearable that tracks heart rate alongside activity, sleep, calories, and movement via accelerometer.
- **Typical examples:** Fitbit, Apple Watch, Garmin fitness bands.
- **Best fit when:** User wants comprehensive health and fitness tracking.
**9031.90 – Heart rate chest straps (electrical impulse detection)**
- **Defining trait:** Uses electrical signal detection from the heart (ECG-like) via chest strap; transmits wirelessly.
- **Typical examples:** Polar H10, Wahoo TICKR, chest straps for cycling or running.
- **Best fit when:** High accuracy needed for sports training or medical-grade monitoring.
## Key differences
| Feature | 9018.19 | 9029.20 | 9031.80 | 9031.90 |
|-----------------------|------------------|---------------|------------------------|-------------------------|
| Primary use | Clinical | Basic BPM | Consumer fitness | Sports/accuracy focus |
| Data type | Medical-grade | BPM only | Multi-sensor | ECG-like electrical signal |
| Wearability | Stationary or clinical | Handheld | Worn on body (wrist/ring) | Chest strap |
## How to choose
- Is it used in a hospital or by medical professionals? → 9018.19
- Does it only show beats per minute without other features? → 9029.20
- Does it track steps, sleep, calories, and movement via accelerometer? → 9031.80
- Is it a chest strap that detects heart’s electrical signals wirelessly? → 9031.90
## Overlaps & pitfalls
- A fitness tracker (9031.80) may include chest strap functionality (9031.90), but the primary function determines classification.
- Chest straps (9031.90) can be used in sports or medical settings, but only if they detect electrical impulses.
- If a device does both fitness tracking and ECG-like monitoring, prioritize based on **main function**: fitness → 9031.80; accuracy/ECG → 9031.90.
- "Tachometer" (9029.20) is vague—ensure it only measures BPM, not full health data