## [Airflow measurement on all-profile vents](/en-INT/solutions/airflow-measurement-on-all-profile-vents) ![airflow vents](/sites/default/files/entityone_paragraphs/images/SOLUTION_Intro_468x468_5.png) ## Optimum and appropriate techniques Measuring the airflow rate through a building's air vents, grilles and diffusers helps to ensure thermal comfort, control the air change rate for indoor air quality and optimise the ventilation system's energy efficiency. This applies to all types of buildings, whether residential, commercial or industrial, and also for safety reasons (smoke extraction, etc.). Whatever the method (scanning, zoning or cone measurement), the measurements must be taken with instruments adapted to the different types of air vents. ## Parameters to be monitored - **Airflow and air velocity** Scanning method ## Scanning method On small flat grilles with straight airflow, scanning consists of placing a propeller probe 2 cm from the grille and sweeping across its entire supply or exhaust surface. The average flow rate is then calculated over a given period of time. For optimum grid measurement using the scanning technique, we recommend using helix probes with a diameter of 100 mm. They provide fast, accurate results, particularly on large grids. Sauermann offers a wide range of propeller anemometers such as the Kimo AMI310. [All our portable instruments](/en-INT/measuring-instruments/portable-instruments) [ read more about AMI 310 ](/en-INT/measuring-instruments/portable-instruments/multifunctions/ami-310) [![ami310](/sites/default/files/styles/medium/public/images/ami310.jpg?itok=hqLZSHF6)](/en-INT/measuring-instruments/portable-instruments/multifunctions/ami-310) #### AMI 310 Multifunction Kimo’s AMI 310 measures simultaneous parameters including pressure, temperature (Pt100 and thermocouple), humidity, air quality (CO/CO2), air velocity, airflow (vane probes and hotwire), and tachometry. [ read more about LV 110 / 111 / 117 ](/en-INT/measuring-instruments/portable-instruments/anemometers/lv-110-111-117) [![lv110](/sites/default/files/styles/medium/public/images/lv110.jpg?itok=DHK6cuet)](/en-INT/measuring-instruments/portable-instruments/anemometers/lv-110-111-117) #### LV 110 / 111 / 117 Thermo-anemometer with integrated vane probe The Kimo LV 110 / 111 / 117 displays velocity and temperature measurements. These thermal anemometers are ideal for measuring air temperature and velocity, especially for building ventilation outlets and industrial ducts. [ read more about Si-VV3 ](/en-INT/measuring-instruments/portable-instruments/thermo-anemometers/si-vv3) [![Si-VV3 thermo-anemometer](/sites/default/files/styles/medium/public/images/vv3.png?itok=HEcg1bZr)](/en-INT/measuring-instruments/portable-instruments/thermo-anemometers/si-vv3) #### Si-VV3 Vane Thermo-anemometer with integrated vane probe The palm-sized Sauermann Si-VV3 vane thermo-anemometer easily measures airflow, air velocity & temperature with its vane probe. ![airflow vents](/sites/default/files/styles/max_1300x1300/public/images/SOLUTION_Produits01_Technique-Balayage_699x393.png?itok=e2qtTt1J) Zoning method ## Zoning method For flat grids with unidirectional flow, the zoning technique (or point-by-point averaging) is also used. This involves dividing the cross-section of the grid into zones and averaging the flow rates in each zone to derive an overall result. The most reliable values combine average measurements for each zone over the same period of time. The choice of probe depends on the application, but for very low-speed airflows requiring high sensitivity and accuracy, a hot-wire probe is recommended. [All our portables instruments](/en-INT/measuring-instruments/portable-instruments) [ read more about VT 210 ](/en-INT/measuring-instruments/portable-instruments/multifunctions/vt-210) [![vt210](/sites/default/files/styles/medium/public/images/vt210.jpg?itok=9VeIq4pr)](/en-INT/measuring-instruments/portable-instruments/multifunctions/vt-210) #### VT 210 Thermo-hygrometer-anemometer Specially designed for the control of ventilation systems, the VT 210 allows users to measure the air velocity, the airflow and the temperature in ducts. [ read more about VT 110 / VT 115 ](/en-INT/measuring-instruments/portable-instruments/anemometers/vt-110-vt-115) [![vt110](/sites/default/files/styles/medium/public/images/vt110.jpg?itok=SeiganV2)](/en-INT/measuring-instruments/portable-instruments/anemometers/vt-110-vt-115) #### VT 110 / VT 115 Hotwire thermo-anemometer Kimo’s VT 110 / 115 is perfect for measuring airflow, air velocity and temperature with its hot wire probe. These thermo anemometers (with hotwire probe) are ideal for measuring air temperature and velocity, especially for building ventilation outlets and industrial ducts. ![airflow vents](/sites/default/files/styles/max_1300x1300/public/images/SOLUTION_Produits02_Technique-Zonage_699x393.png?itok=23Hgm10w) Cone measurement ## Cone measurement Using a cone of the right size will improve efficiency and accuracy. For diffusers larger than 450x450 mm, a balometer is more versatile and specialised. This equipment is essential for multidirectional flow diffusers. Applying a cone interferes with the airflow by generating turbulence. Our anemometers can compensate for the generated pressure drop by selecting the type of cone in their menu. For balometer measurements, this compensation is achieved by selecting the vent profile on the mobile application. [All our portable instruments](/en-INT/measuring-instruments/portable-instruments) [ read more about DBM 620 ](/en-INT/measuring-instruments/portable-instruments/airflow-meters/dbm-620) [![DBM 620 Balometer](/sites/default/files/styles/medium/public/images/DBM620-1_1.jpg?itok=yrwC_FGV)](/en-INT/measuring-instruments/portable-instruments/airflow-meters/dbm-620) #### DBM 620 Air Flow Meter The newly redesigned Kimo DBM 620 Air Flow Meter is a multipurpose electronic air balancing instrument primarily used for efficiently taking direct air volume readings from air vents. [ read more about Airflow cones ](/en-INT/measuring-instruments/portable-instruments/accessories/airflow-cones) [![cones_range_hotwire](/sites/default/files/styles/medium/public/images/Range_hotwire.png?itok=eg-5hXat)](/en-INT/measuring-instruments/portable-instruments/accessories/airflow-cones) #### Airflow cones For hotwire anemometers The K35, K75, K120 and K150 are airflow measurement cones designed for Ø 8 mm hot-wire anemometers. These cones are especially suited to Kimo [VT 110](https://sauermanngroup.com/en-INT/node/83/), [VT 210](https://sauermanngroup.com/en-INT/node/86/), [MP 210](https://sauermanngroup.com/en-INT/node/87/) and [AMI 310](https://sauermanngroup.com/en-INT/node/88/) instruments. | ##### | ![K35](/sites/default/files/inline-images/K35_0.png) | ![K75](/sites/default/files/inline-images/K75.png) | ![K120](/sites/default/files/inline-images/K120%20copie.png) | ![K150](/sites/default/files/inline-images/K150%20copie_0.png) | |---|---|---|---|---| | ##### **Designation** | ##### **K35 (10374)** | ##### **K75 (10637)** | ##### **K120 (11595)** | ##### K150 (11926) | | ##### **Flow** | ###### 10 to 400 m3/h | ###### 30 to 750 m3/h | ###### 50 to 1200 m3/h | ###### 10 to 400 m3/h | | ##### **Dimensions** | ###### 200 x 200 mm ###### Height: 330 mm | ###### 300 x 300 mm ###### Height: 470 mm | ###### 450 x 450 mm ###### Height: 600 mm | ###### 550 x 100 mm ###### Height: 585 mm | [ read more about Airflow cones ](/en-INT/measuring-instruments/portable-instruments/accessories/airflow-cones-0) [![Compo_Si-K25_Si-K85](/sites/default/files/styles/medium/public/images/Compo_Si-K25_Si-K85.png?itok=AnL8Tsxk)](/en-INT/measuring-instruments/portable-instruments/accessories/airflow-cones-0) #### Airflow cones For vane anemometers The Si-K25 and Si-K85 are airflow measurement cones designed for 100 mm diameter vane anemometers. These models feature a honeycomb-structured airflow straightener that reduces turbulence for more reliable flow measurement. The Si-K25 and Si-K85 are perfectly suited to Kimo [LV 110](https://sauermanngroup.com/en-INT/node/78/) and [LV 130](https://sauermanngroup.com/en-INT/node/79/), [VT 210](https://sauermanngroup.com/en-INT/node/86/), [MP 210](https://sauermanngroup.com/en-INT/node/87/) and [AMI 310](https://sauermanngroup.com/en-INT/node/88/) [anemometers](https://sauermanngroup.com/en-INT/taxonomy/term/16). The Si-K85 square cone can be used with medium-sized air vents. The Si-K25 round cone is designed for small and medium-sized round vents. | | ![Si-K25](/sites/default/files/inline-images/Si-K25_face_0.png) | ![Si-K85](/sites/default/files/inline-images/Si-K85_3.png) | |---|---|---| | ##### Designation | ##### Si-K25 (28111) | ##### Si-K85 (28112) | | ##### Flow | ###### 10 to 400 m3/h | ###### 10 to 400 m3/h | | ##### Internal dimensions | ###### Ø 260 mm | ###### 350 x 350 mm | | ##### External dimensions | ###### L 282 x W 282 x H 268 mm | ###### L 372 x W 372 x H 327 mm | ![airflow vents](/sites/default/files/styles/max_1300x1300/public/images/SOLUTION_Produits03_Mesure-Cone_699x393.png?itok=CpGKX4AQ) Metrological Services ## Metrological Services Whatever the technique or type of probe used to measure airflow, the sensors are subject to physical constraints. They need to be calibrated frequently to guarantee reliable measurements - every year at best. At Sauermann, we calibrate your anemometers and balometers in our laboratories in the Dordogne. The operation takes place in areas equipped with state-of-the-art speed benches for maximum accuracy and compliance with standards. [Ask for our services](https://sauermanngroup.com/en-INT/services) ![airflow vents](/sites/default/files/styles/max_1300x1300/public/images/SOLUTION_Produits04_Metrologie_699x393_2.png?itok=IadIzDGP) Blog posts [ ![mesure de bouche](/sites/default/files/styles/insight_teaser/public/images/mesuredebouche_0.jpeg?itok=eNF0UluM) November 26, 2021 Measuring air flow rate at an air vent: getting it right Here’s our comprehensive guide to taking accurate and reliable air flow rate and velocity readings at an air vent. Instruments ](/en-INT/insights/measuring-air-flow-rate-air-vent-getting-it-right) [ ![ACR CO2 TRA](/sites/default/files/styles/insight_teaser/public/images/CO2-600.png?itok=SIVP6uW8) April 15, 2022 Using CO2 concentration to measure air change rate New health and safety rules recommend checking the air change rate by measuring the CO2 concentration against a target value. Here, we explain why and how it’s done. Instruments ](/en-INT/insights/using-co2-concentration-measure-air-change-rate) [ ![Datwyler thumbnail](/sites/default/files/styles/insight_teaser/public/images/Datwyler_600x400_0.jpg?itok=yslFz93s) How Our Air Flow Meters Help Data Centre Health Check Assessments An air flow meter is a device that measures air flow. There are often a number of IAQ requirements for minimum ventilation of occupied spaces, and the need for accurate and reliable air flow measurement is a must-have. Instruments ](/en-INT/insights/how-our-air-flow-meters-help-data-centre-health-check-assessments) ![picto in house](/sites/default/files/styles/thumbnail/public/images/picto2_3.png?itok=Ef_YwvA-) ## In-House Our two main factories Our customer service Our metrology laboratories Our Research & Development team ![expertise](/sites/default/files/styles/thumbnail/public/images/45Years_EN_12.png?itok=jqkUoL7e) ## 45 years of experience For over 45 years, the Sauermann Group has been designing, manufacturing and marketing products and services dedicated to the HVACR and industrial markets. [Information, quotes: I'd like to be contacted by phone](/en-INT/contact)