This 4 Channel K Thermocouple SD Card Logger is the best tool for multiple mesurement. à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ SD900 SD900 : 4 Channels K Type SD Card Logger Features: Super big LCD portable/wallmount SD card logger Measure temperature via K Type thermocouple 4 Channel K Type thermocouple to use at once Unlimited manual memories in SD card Unlimited autologging memories in SD card HOLD function freezes current readings Checking MAX/MIN value from power on Beeper and LED alarm are both available One button press to display T1-T2 Display temperature change from baseline Programmable temperature HIGH/LOW alarm limit Temperature offset function for adjustment purpose Over-range indication with error messages Blue backlight function works in dark area 12 hour/24 hour time format selectable Real time display (iyear-mon-date, hour-min) 20 mins auto power off to save power Temperature units (°C/°F) selection Powered by 4pcs AA batteries (included in the set) or 9V adaptor (not included in the set) Low batter indicator Specifications K Temp. Range: -200 to 1370°C, -328 to 2498°F K Temp. Resolution: 0.1°C, 0.1°F K Temp. Accuracy (under 18 to 28°C ambient temp.): ±(0.3% rdg +1°C) Sampling Rate: Programmable from 1 second up LCD Size (H×W): 47×104mm Operating Temp.: 0 to 50°C Operating RH%: Humidity < 80%RH Storage Temp.: -20 to 50°C Storage RH%: Humidity < 90%RH Dimension (L×W×T): 152×100×39mm Weight: 300g Power Supply: 4×AA Batteries (included in the set) or 9V adaptor (not included in the set) Datalogger SD900 Temperature TLEAD à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ à¤Ã×èͧÇÑ´áÅкѹ·Ö¡¢éÍÁÙÅ