à¤Ã×èͧÁ×ÍÇÔ·ÂÒÈÒʵÃì ÍØ»¡Ã³ìÇÔ·ÂÒÈÒʵÃì à¤Ã×èͧÁ×ÍÇÑ´ à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ à·ÍÃìâÁÁÔàµÍÃì à¤Ã×èͧÁ×ÍÇÑ´ 421509: 7 Thermocouple Dual Input Datalogger with Alarm 421509: 7 Thermocouple Dual Input Datalogger with Alarm Memory stores up to 16 data sets, 1024 maximum data capacity Features: Seven Thermocouple type selections: K, J, T, E, R, S, N Large backlit LCD with two secondary displays Simultaneous display of T1, T2, T1-T2, Time and advanced readouts T/C offset adjustment, °C/°F switchable REC, MAX, MIN, MAX-MIN, AVG Data Hold and Relative functions Programmable Hi/Lo audible alarm Built-in bi-directional RS-232 PC interface (PC software and cable included) For complete specs please download the product datasheet 421509 Extech Temperature Thermometer à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ à·ÍÃìâÁÁÔàµÍÃì