The Extech 421509 thermometer and data logger is a dual input precision thermocouple thermometer with
data logging capability to store up to 16 data sets (1024 maximum data capacity). The Extech 421509
thermometer and data logger accepts input from 7 different types of thermocouples: K, J, T, E, R, S,
or N. The temperature range of the Extech 421509 thermometer and data logger with a Type K thermocouple
is -328 to 2501°F with a basic accuracy of ±0.05% of reading. The Extech 421509 thermometer and
data logger has a large, backlit LCD with two secondary displays for T1, T2, T1-T2, time, and advanced
readouts.
Other features of the Extech 421509 thermometer and data logger include T/C offset adjustment, REC,
MAX, MIN, MAX-MIN, AVG, and °C / °F switchable, data hold and relative function, and a bi-directional
RS-232 PC interface. A programmable Hi / Lo alarm is also included with a real time clock calendar which
will alert you if your system ever exceeds your preset temperature contraints.
