Testo

The testo 6441 compressed air meter is also a transmitter, which converts the measured parameter into a standardized electrical signal. The transmitter can therefore be integrated into systems (e.g. compressed air systems), making it a key instrument in measuring and control technology. The testo 6441 compressed air meter also offers the following advantages: Ultimate flexibility with a variety of signal outputs: analog output, pulse output, 2 switching outputs. You will therefore be equipped for any kind of application, whether that is consumption measurement, consumption or leak monitoring or even flow measurement  Integrated totalling function: the practical totaliser means that no additional analysis units are needed to calculate the total consumption  Ultimate accuracy: the precisely defined inner diameter (DN15) enables adjustment to standard volumetric flow, providing a high degree of measuring accuracy. This is an advantage compared with standard penetration probes, which calculate volume flow on the basis of measured flow and indicated pipe diameter – a procedure that is more vulnerable to error than measurement using the compressed air meter  Easy operation with a high degree of flexibility: parametrization of signal outputs, switching of physical units, signal delay, signal attenuation are all possible  Measurement according to the calorimetric principle: no pressure loss during measurement  Other advantages: no temperature compensation required, quick response time, robust sensor, optimized accuracy thanks to integrated inflow and outflow sections > Each Unit Includes Testo 6441 compressed air meter with integrated inflow/outflow section, diameter DN15 (½), with analog, pulse and switching output

Direct display of volume flow Multi-point or timed mean calculation Max/min values Hold button to freeze readings Display light Auto-Off function Storage temperature -40 to 85 °C Operating temperature -20 to 50 °C Battery type 9V block battery, 6F22 Battery life 80 h Weight 325 g Dimensions 182 x 64 x 40 mm Material/Housing ABS Meas. Range 0.6 to 40 m/s Accuracy ±(0.2 m/s 1.5% of mv) Resolution 0.1 m/s > Each Unit Includes Batteries Calibration protocol

The hood features a unique flow straightener, which significantly improves measurement accuracy, saving you valuable time on difficult tasks  The testo 420 control unit can be tilted for a more convenient view of the display  The included Bluetooth / app feature allows for wireless connection to mobile devices, for remote monitoring, as well as remote operation  The testo 420 app can send measurement reports directly from the work site via email  For additional convenience, there is an optional tripod when working with high ceilings, as well as four additional flow hood sizes available for complete versatility The testo 420 is also a CEC approved air flow capture hood Temperature NTC Measuring range -4° to 158 °F / -20 to 70 °C Accuracy ±1 °F (32° to 158 °F) / ±0.5 °C (0 to 70 °C) ±1.4 °F (-4° to 32 °F) / ±0.8 °C (-20 to 0 °C) Resolution 0.1 °F / 0.1 °C Reaction time 45 sec (t90) Humidity Capacitive Measuring range 0 to 100 %rH Accuracy ±1.8 %rH 3 % of mv at 77 °F / ±1.8 %RH 3 % of mv at 25 °C (5 to 80 %rH) Resolution 0.1 %rH Differential Pressure Measuring range -0.480 to 0.480 InH₂O / -120 to 120 Pa Accuracy ±2 % of mv 0.002 InH₂O at 72 °F, 405 InH₂O / ±2 % of mv 0.5 Pa at 22 °C, 1013 hPa Resolution 0.001 InH₂O / 0.001 Pa Reaction time 1 sec (t90) Absolute Pressure Measuring range 280 to 440 InH₂O / 700 to 1100 hPa Accuracy ±1 InH₂O / ±3 hPa Resolution 0.1 InH₂O / 0.1 hPa Reaction time 1 sec Volume flow Measuring range 24 to 2354 CFM / 40 to 4000 m³/h Accuracy ±3 % of mv 7 CFM at 72 °F / ±3 % of mv 12 m³/h at 22 °C 405 InH₂O (50 to 2060 CFM) / 1013 hPa (85 to 3500 m³/h) Resolution 1 CFM / 1 m³/h Reaction time 1 sec (t90) Dimensions 24 x 24 in. (Standard hood) / 610 x 610 mm (Standard hood) Operating temperature 23° to 122 °F / -5 to 50 °C EU-/EG-guidelines EU-guideline 2014/30/EU Battery type Alkaline, type AA Battery life 40 h Display size 3.5 Display function Dot matrix Display ligthing with illumination Interface Micro-USB, Bluetooth® 4.0 wireless technology Memory 2 GB (internal) Storage temperature -4° to 140 °F / -20 to 60 °C Weight 102 oz. / 2900 g > Each Unit Includes testo 420 air flow capture hood base with Bluetooth 24 x 24 capture hood with flow straightener USB cable Batteries Soft case with telescoping handle Wheels

Differential pressure measurement, useful for checking filters in air conditioning and ventilation systems  Calculate flow velocity and volume flow using an optional pitot tube  Save measurement data for analysis and documentation  Match with a Testo CEC compliant air flow capture hood to measure volume flows at supplies and returns (0563 4200) Differential Pressure: Measuring range -0.480 to 0.480 InH₂O / -120 to 120 Pa 19.7 to 2756 fpm / 0.1 to 14 m/s Accuracy ±2 % of mv 0.002 InH₂O at 72 °F, 405 InH₂O / ±2 % of mv 0.5 Pa at 22 °C, 1013 hPa Resolution 0.001 InH₂O / 0.001 Pa 0.01 fpm / 0.01 m/s Reaction time 1 sec (t90) > Absolute Pressure Measuring range 280 to 440 InH₂O / 700 to 1100 hPa Accuracy ±1 InH₂O / ±3 hPa Resolution 0.1 InH₂O / 0.1 hPa Reaction time 1 sec > Dimensions 6 x 3 x 1 in. / 150 x 85 x 35 mm Operating temperature 23° to 122 °F / -5 to 50 °C EU-/EG-guidelines EU-guideline 2014/30/EU Battery type Alkaline, type AA Battery life 40 h Display size 3.5 Display function Dot matrix Display ligthing with illumination Interface Micro-USB Memory 2 GB (internal) Storage temperature -4° to 140 °F / -20 to 60 °C > Each Unit Includes Testo 420 differential pressure measuring instrument Batteries Certificate of calibration

For A/C, ventilation and Indoor Air Quality with readings memory, PC software and USB data transmission cable, with battery and calibration protocol Instrument memory for 10,000 readings PC software for analysis, filing and documentation of measurement data IAQ probe, lux probe and comfort level probe Thermal probes, vane measurement and built-in differential pressure probe probe for Pitot tube measurement Radio probe for temperature and humidity Protection class IP54 > Each Unit Includes PC software USB cable Battery Calibration document