Kestrel
Kestrel 3500 Weather Meter
$209
Best Anemometers · head-to-head
Kestrel 3500 Weather Meter vs BTMETER BT-100APP Bluetooth Vane Anemometer
A sourced, side-by-side comparison. BTMETER BT-100APP Bluetooth Vane Anemometer is cheaper at $30.99. Every spec and price links to its source.
BTMETER
BTMETER BT-100APP Bluetooth Vane Anemometer
$30.99Cheaper
Which is better: the Kestrel 3500 Weather Meter or BTMETER BT-100APP Bluetooth Vane Anemometer?
On the specs we track, they're closely matched. The BTMETER BT-100APP Bluetooth Vane Anemometer is the cheaper at $30.99.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Kestrel 3500 Weather Meter | BTMETER BT-100APP Bluetooth Vane Anemometer |
|---|---|---|
| US price | $209 | $30.99 |
| Brand | Kestrel | BTMETER |
| Released | — | — |
| Wind speed range ms | 0.6 to 40.0 m/s (1.3-89.5 mph); operational to 60.0 m/s | 0.3 to 30 m/s (0.67-67.1 mph) |
| Airflow cfm cmm | — | CFM = velocity (ft/min) x duct cross-sectional area (ft²), user-entered area |
| Velocity accuracy | Larger of ±3% of reading or 20 ft/min | ±5% of reading |
| Sensor type | Rotating vane (impeller) | 8-vane wheel with dual temperature sensors |
| Temperature range | -10 to 55 °C (14 to 131 °F), ±0.5 °C accuracy | -10 to 45 °C (14 to 113 °F), ±2 °C accuracy |
| Data hold logging | No built-in logging on base 3500 (shows current/max/min/avg); optional USB/RS-232 PC interface cable sold separately for one-way data transfer | Current/Max/Min/Average hold; Bluetooth live streaming to companion app (no onboard SD logging) |
| Backlit display | Yes | Yes |
Sources — Kestrel 3500 Weather Meter: kestrelinstruments.com (verified 2026-08-09). BTMETER BT-100APP Bluetooth Vane Anemometer: btmeter-store.com (verified 2026-08-09).
What's the difference between the Kestrel 3500 Weather Meter and BTMETER BT-100APP Bluetooth Vane Anemometer?
Where the two actually differ on the specs we track (5 of 7). Matching specs are omitted.
- Wind speed range ms: Kestrel 3500 Weather Meter 0.6 to 40.0 m/s (1.3-89.5 mph); operational to 60.0 m/s vs BTMETER BT-100APP Bluetooth Vane Anemometer 0.3 to 30 m/s (0.67-67.1 mph)
- Velocity accuracy: Kestrel 3500 Weather Meter Larger of ±3% of reading or 20 ft/min vs BTMETER BT-100APP Bluetooth Vane Anemometer ±5% of reading
- Sensor type: Kestrel 3500 Weather Meter Rotating vane (impeller) vs BTMETER BT-100APP Bluetooth Vane Anemometer 8-vane wheel with dual temperature sensors
- Temperature range: Kestrel 3500 Weather Meter -10 to 55 °C (14 to 131 °F), ±0.5 °C accuracy vs BTMETER BT-100APP Bluetooth Vane Anemometer -10 to 45 °C (14 to 113 °F), ±2 °C accuracy
- Data hold logging: Kestrel 3500 Weather Meter No built-in logging on base 3500 (shows current/max/min/avg); optional USB/RS-232 PC interface cable sold separately for one-way data transfer vs BTMETER BT-100APP Bluetooth Vane Anemometer Current/Max/Min/Average hold; Bluetooth live streaming to companion app (no onboard SD logging)