DTM 315:
+ -200℃~ 1370℃ (-328 ℉ ~ 3498 ℉)
+4 digit LCD display
+ Timer function
+ K-type thermocouple
+ Reading hold ℃ of ℉ annunicators
+ Single thermocouple input
+ MAX. AVG. MIN. function
+ Auto power off
+ HOLD, △REL function
+ Automatic low battery indication
+ Overrange indication
+ RS-232 computer Interface (Option)
DTM 316 :
+ -200℃~ 1370℃ (-328 ℉ ~ 3498 ℉)
+ 4 digit LCD display
+ K-type thermocouple
+ Function & unit sign display ℃ or ℉ annunciators
+ Dual thermocouple input
+ Differential temperature (T1-T2)
+ MAX. AVG. MIN. function
+ Auto power off
+ HOLD, △REL function
+ Automatic low battery indication
+ Overrange indication
+ RS-232 computer Interface
+ RS-232 /USB cable + Software (Option)