Extech-SDL550-Moisture-Content-Meter-&-Datalogger-EXTECH-SDL550-The-Extech-SDL550-moisture-content-meter-&-datalogger-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-It-measures-moisture-content-air-temperature-dew-point-&-temperature-using-a-600mm-23-7in-heavy-duty-stainless-stee