2-channel Temperature and Humidity Logger with -40°C to 85°C range Hioki compact 1 or 2-channel data loggers feature a 60,000 data set/channel memory to measure temperature, humidity, voltage or instrumentation signals. The LR5001 logs temperature and humidity over 2 channels in as fast as 1 second intervals. Note: Communication adapter LR5091 or Data collector LR5092-20 is necessary to transfer data from a LR5000 series Logger to a PC