# Extech 45158 Mini Thermo-Anemometer with Humidity vs Proster Handheld Digital Anemometer: specs and price compared

A sourced, side-by-side comparison of the Extech 45158 Mini Thermo-Anemometer with Humidity (Extech Instruments) and Proster Handheld Digital Anemometer (Proster) among anemometers.

## Side by side

| Spec | Extech 45158 Mini Thermo-Anemometer with Humidity | Proster Handheld Digital Anemometer |
| --- | --- | --- |
| US price | not published | $33.67 |
| Brand | Extech Instruments | Proster |
| Wind speed range ms | 1.1 to 20 m/s (2.5-44.7 mph) | 0.4 to 30 m/s (80-5900 ft/min) |
| Airflow cfm cmm | — | 0 to 99990 CFM and CMM |
| Velocity accuracy | ±(3% of reading + 0.4 mph) | — |
| Sensor type | Vane, 1 in. (24mm) diameter | Rotating vane |
| Temperature range | -18 to 50 °C (0 to 122 °F), ±1 °C accuracy | Displays temperature and wind chill, including sub-0°C readings; exact range not stated in surfaced sources |
| Data hold logging | Data hold; selectable 5/10/13-second averaging (no onboard SD/USB logging) | Reading hold; max/min for handheld or fixed measurement; no onboard logging |
| Backlit display | Yes | Yes |

## Key differences

- Wind speed range ms: Extech 45158 Mini Thermo-Anemometer with Humidity 1.1 to 20 m/s (2.5-44.7 mph) vs Proster Handheld Digital Anemometer 0.4 to 30 m/s (80-5900 ft/min)
- Sensor type: Extech 45158 Mini Thermo-Anemometer with Humidity Vane, 1 in. (24mm) diameter vs Proster Handheld Digital Anemometer Rotating vane
- Temperature range: Extech 45158 Mini Thermo-Anemometer with Humidity -18 to 50 °C (0 to 122 °F), ±1 °C accuracy vs Proster Handheld Digital Anemometer Displays temperature and wind chill, including sub-0°C readings; exact range not stated in surfaced sources
- Data hold logging: Extech 45158 Mini Thermo-Anemometer with Humidity Data hold; selectable 5/10/13-second averaging (no onboard SD/USB logging) vs Proster Handheld Digital Anemometer Reading hold; max/min for handheld or fixed measurement; no onboard logging

## Sources

- Extech 45158 Mini Thermo-Anemometer with Humidity: https://www.extech.com/products/45158 (extech.com, verified 2026-08-09)
- Proster Handheld Digital Anemometer: https://www.ebay.com/itm/358241845889 (ebay.com, verified 2026-08-09)

Canonical: https://frontdeskreview.com/gear/anemometers/extech-45158-vs-proster-handheld-anemometer/
Cite: Per The Front Desk Review, Extech 45158 Mini Thermo-Anemometer with Humidity (not published) vs Proster Handheld Digital Anemometer ($33.67) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/anemometers/extech-45158-vs-proster-handheld-anemometer/
License: CC BY 4.0.