The Series UDL data loggers from Dwyer Instruments Inc., Michigan City, IN, are available with 0, 2, or 4 universal inputs, each of which can be individually configured to accept a thermocouple, RTD, thermistor, voltage, or current input. The loggers have an internal temperature sensor and a digital input that can be used as a trigger to start logging or as a pulse counter for interfacing with flowmeters or other sensors with a pulse output. An internal humidity sensor, an LCD, and an external humidity and temperature sensor are available as options. The loggers interface to the USB port of a PC and ship with software, a USB cable, and an installed battery.
Dwyer Instruments Inc.