- ST688
+ High-performance, temperature gun-style infrared thermometer
+ Temperature range: -50°C to 1000°C
+ Laser sighting with on/off switch
+ Adjustable emissivity 0.1 to 1.0, ideal for surface temperature measurement of many materials including food
+ Precision 50:1 germanium optics
+ Audible alarms
+ 10 point memory
+ Tripod mount
- ST689
+ All the features of the ST688, plus:
+ USB data output for temperature display and logging
+ USB cable and software supplied
+ Type K thermocouple input