Extech 42270 Temperature/Humidity DataloggerExtech 42270 Humidity + Temperature Datalogger Kits Humidity + Temperature Datalogger Kits Compact, powerful and easy to use Records up to 16,000 readings Key Features: Model 42265 Temperature Datalogger kit records up to 8000 readings Model 42275 Temperature and Humidity Datalogger kit records up to 16,000 readings (8,000 readings for each parameter) Use in storage containers, shipping vans, freezers and more Logs data for days, weeks or months up to