testo 6440 compressed air meter

4 diameter types:
DN 15: 0,25 to 75 Nm3/h

DN 25: 0,75 to 225 Nm3/h

DN 40: 1,3 to 410 Nm3/h

DN 50: 2,3 to 700 Nm3/h

Parameters: standard volumetric flow rate in Nm³/h or Nl/min; consumption quantity in Nm³; media temperature in °C
Output signals: The following 2 outputs are enabled for selection at the same time:
Analog output, 4 to 20 mA (4-wire)
Pulse output
2 switch signals, programmable (dependent on consumption or volumetric flow rate, time-based or non time-based, NC or NO contact, hysteresis, window)
Extremely easy to operate using just 2 control buttons
Design with inflow stretch
Advantage: reliable accuracy, including in installed state!
Reason: The sensor is calibrated to the pipe section (Nm³/h not m/s) -> optimum flow profile, hence no loss of accuracy through specification of incorrect pipe diameter, incorrect positioning (depth/torsion)!

testo 6440有四种测量管口径的型号，设计紧凑，蕴含尖端技术，并提供各种信号输出。
带有流出和流进测量管，确保最佳的精度。
热敏陶瓷传感器采用玻璃套管，坚固耐用，且响应极快。
testo6440的传感器内置于测量管，不同于其他公司的插入式探头。因为插入式探头容易倾斜，仅5°的倾斜度，就会造成5%的偏差。
testo 6440不仅带有流出和流进测量管（DN40/DN50型号的长度较短），而且管道内壁光滑（无凹凸）。
正是testo 6440出众的细节设计，才能优化流量，达到最佳的测量精度。

testo6440压缩空气流量计是监测压缩空气消耗情况的理想仪表。它不仅可以诊断出压缩空气系统是否存在泄漏情况，而且可以合理分配压缩空气的消耗量，进行峰值负载管理，从而帮助企业达到节约能耗、降低成本的效果。