Air flowDigital thermoanemometer FVAD 35 THx with with integrated atmospheric pressure sensor,ALMEMO® D6 plugfor automatic pressure compensation • Automatic atmospheric pressure compensation is provided for pressure-dependent flow velocity by means of a digital atmospheric pressure sensor integrated in the ALMEMO® D6 plug itself. • Digital thermoanemometer with A/D converter in the grip or integrated in the cable • The probe tube has a small diameter, only 6 mm. • All relevant measurable variables can be measured using just one sensor. • Three measuring channels are programmed (at our factory): Temperature (°C, t), Flow velocity (m/s, v), Atmospheric pressure (mbar, AP, p) General features and accessories, ALMEMO® D6 sensors: see chapter ALMEMO® Measuring instruments DAkkS accredited calibration or factory calibration KV90xx air flow for digital sensor, see chapter „Calibration certificates“. DAkkS accredited calibration meets all the requirements regarding test resources laid down in DIN EN ISO/IEC 17025. Digital thermoanemometer (Sensor including A/D converter) Measuring range Temperature compensation Influence of temperature FVAD 35 TH4 / TH4Kx Incidental flow Angle dependence Pressure range Pressure compensation ±0.3 % of measured value /°C at 0.3 to 20 m/s bidirectional <3 % of measured value with deviation <15 ° Ambient pressure automatic in range 700 to 1100 mbar Response time T90 typical 10 seconds Digital atmospheric pressure sensor (integrated in ALMEMO® D6 plug) Measuring range 700 to 1100 mbar Refresh rate 0.5 seconds for all 3 channels Flow aperture approx. 10 x 3 mm FVAD 35 TH4 / TH5 Probe with grip, probe lengths 210 mm (plus grip), ALMEMO® cable 1.5 meters FVAD 35 TH4Kx / TH5Kx Probe with detached electronics unit integrated in the cable, Probe lengths THxK1, 80 mm / THxK2, 300 mm Probe cable 5 meters to the electronics, ALMEMO® cable 1.5 m 11/2025 • We reserve the right to make technical changes. Variants (including works certificate) Order no. Digital thermoanemometer, fitted cable with ALMEMO® D6 plug and integrated digital atmospheric pressure sensor Sensor 2 m/s, length = 210 mm, (with grip) Sensor 2 m/s, length = 80 mm, (detached electronics unit) Sensor 2 m/s, length = 300 mm, (detached electronics unit) Sensor 20 m/s, length = 210 mm, (with grip) Sensor 20 m/s, length = 80 mm, (detached electronics unit) Sensor 20 m/s, length = 300 mm, (detached electronics unit) Other designs are available on request Probe with detached electronics unit integrated in the cable