Portable hot wire anemometer probe

LSI LASTEM supplies a vast range of indoor monitoring sensors addressed to their own data acquisition device as well as to third part data management systems.

The sensor range include sensors for portable application as well as fix application.

Portable hot wire anemometer for measuring mean air speed (va). ESV107-307 measure the air speed only, using one sample every 100 ms and update output every one sec. The ESV307 model is similar to the ESV107 model, but its output is serial to be connected directly to the RS232-2 port of the E / M-Log data loggers. ESV306 calculates also turbolence intensity (TU) in compliance with ISO7726 using air speed measurement sampled every 100 ms, a rate allowing calculation of Average air speed (va), standard deviation and Turbulence index over 1 second.

The reading is then updated every second with a running average over the previous 5 sec. These sensors can be used in indoor environments, ducts, ventilation outlets. It can be hand-held or it can be mounted on a tripod during longer measurements. When the support for the directional measurement is removed, this sensor has a good response to plane omnidirectional air flow which arrive on the hot wire from any directions within 300°.

Highlights

• Very low measurement threshold: 0,01 m/s
• Because of the omni-directional sensitivity, this sensor is very suitable in applications where the air flow is not directional as in Heat stress and Thermal comfort applications
• Because of the fast response time. This sensor is very suitable for Turbolence Intensity (TU) measurements. LSI LASTEM’s M/R-Log data loggers can calculate di-rectly TU and % of people disatisfy by air draft as described in ISO7730 standard.
• Using air speed values, LSI LASTEM’s M/R-Log data loggers can calculate directly, air flow (mass and volu-me) and number of air changes
• Internal ISO17025 accreditated calibration laboratory