• 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. Technical data Digital thermoanemometer (Sensor including A/D converter) Flow Measuring range FVAD 35 TH4 / TH4Kx 0.08 to 2 m/s FVAD 35 TH5 / TH5Kx 0.2 to 20 m/s Resolution FVAD 35 TH4 / TH4Kx 0.001 m/s FVAD 35 TH5 / TH5Kx 0.01 m/s Response time <1.5 seconds Accuracy FVAD 35 TH4 / TH4Kx ± (0.04 m/s +1 % of meas. val.) FVAD 35 TH5 / TH5Kx ± (0.2 m/s +2 % of meas. val.) Nominal conditions 22 °C ±2 K, 45 % RH ±10 % RH 1013 mbar Temperature compensation 0 to +50 °C Influence of temperature FVAD 35 TH4 / TH4Kx ±0.5 % of measured value /°C at 0.3 to 2 m/s FVAD 35 TH5 / TH5Kx ±0.3 % of measured value /°C at 0.3 to 20 m/s Incidental flow bidirectional Angle dependence <3 % of measured value with deviation <15 ° Pressure range Ambient pressure Pressure compensation automatic in range 700 to 1100 mbar Variants (including works certificate) Temperature Measuring range -20 to +70 °C Resolution 0.1 °C Accuracy ±0.7 °C at 0 to 50 °C and >0.5 m/s Response time T90 typical 10 seconds Digital atmospheric pressure sensor (integrated in ALMEMO® D6 plug) Measuring range 700 to 1100 mbar Accuracy ±2.5 mbar (at 23 °C ±5 K) ALMEMO® D6 plug Refresh rate 0.5 seconds for all 3 channels Supply voltage 6 to 13 VDC Current consumption 50 mA Dimensions Probe diameter 6 mm 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 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) FVAD35TH4 Sensor 2 m/s, length = 80 mm, (detached electronics unit) FVAD35TH4K1 Sensor 2 m/s, length = 300 mm, (detached electronics unit) FVAD35TH4K2 Sensor 20 m/s, length = 210 mm, (with grip) FVAD35TH5 Sensor 20 m/s, length = 80 mm, (detached electronics unit) FVAD35TH5K1 Sensor 20 m/s, length = 300 mm, (detached electronics unit) FVAD35TH5K2 Other designs are available on request High-temperature thermoanemometer MT8635THx Operative range -40 to +120 °C, up to 40 m/s Probe with detached electronics unit integrated in the cable 11/2025 • We reserve the right to make technical changes. Digital thermoanemometer FVAD 35 THx with ALMEMO® D6 plug with integrated atmospheric pressure