These instruments serve both as portable thermocouple thermometers and as temperature/RH dataloggers when connected to your computer via the RS232 port. Unlike standard chart recorders they can datalog not only air, but liquid and surface temperatures as well, using a wide variety of thermocouple probes. Features include min-max-avg, relative temperature, auto power off, and hold functions. These well made units have exceptional accuracy for thermocouple thermometers, fast response times, high 0.1ºC & ºF resolution (-200 ~ 800ºC) and wide measurement ranges. Meters have large easy to read 3 ½ digit LCD and accept any Type K or J thermocouple probe. All models comes ready to use with carrying cases, beaded wire probes, and batteries. Datalogging models 800008 can automatically record and store up to 16,000 (!) data points in the field which can later be downloaded to your computer. These models come with software and RS232 cables as well as the accessories listed above. Also available with NIST traceable certificate of calibration. Meter dim: 7 ¼? x 2 ½? x 1 ¼? (184 x 64 x 30mm). Weight: 7.4oz (210g).