Testo 451 Anemometer Professional HVAC Temperature,Humidity 

Measurement Device

This listing is for a Testo 451 Anemometer (Part no. 0554.0770/0560.4511).

The Testo 451 is a classic, legacy multifunction meter—often referred to as an "Instant Action Anemometer"—built for measuring air velocity, temperature, and humidity.

Primarily used by HVAC professionals and engineers for decades, these vintage units are highly valued for their ruggedness.

The device features a measuring range of 0.2 to 60 m/s for velocity and -120 to +1370 °C for temperature.

It includes analog outputs and specific probe connections for humidity and temperature sensors.

Condition:This device powers on Once I replaced the 9v Battery. All the buttons function. Device asks to attach a probe. Please take your time to review the images as they form part of the description.

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