Extech-SDL350-Hot-Wire-Thermo-Anemometer-&-Data-Logger-EXTECH-SDL350-p-The-Extech-SDL350-Hot-Wire-Thermo-Anemometer-&-Data-Logger-records-data-on-an-SD-card-in-Microsoft-Excel-reg-format-for-easy-transfer-to-a-PC-for-analysis-The-user-can-manually-store-99-readings-or-set-the-logger-to-automatically-store-up-to-20M-samples-with-date-&-time-stamp-at-a-user-selected-sample-rate-The-SDL3560-measures-air-velocity-using-a-telescoping-probe-designed-to-fit-into-HVAC-ducts-&-other-small