Featuring external probe, submersible and portable Model HTDL-20/30 records up to 32,700 measurements in nonvolatile, solid-state relay memory that retains data even if battery becomes discharged. Logger can be started and stopped from PC or delayed to start up to 18 months after initialization, and sampling rate is selectable from 1 sec to 24 hr. Accuracy is 0.18°F from 68 to 284°F and 0.54°F from -4 to 67.98°F, and resolution is 0.02°F.
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