Models TRID30-7R : (replaceable battery, download instructions here) TRID30-7F : (fixed battery) TRID30-7FW (fixed battery, preconfigured and package to meet WHO specification E006/TR06.3) Measurement Range -30°C ~ +60°C (-22°F ~ +140°F) Resolution 0.1°C(0.2°F) for measurements -30°C ~ +40°C (-22°F ~ +104°F) 0.2°C(0.4°F) for measurements above +40°C (+104°F) Accuracy Better than ±0.5°C (±0.9°F) for measurements from -20°C~+40°C (-4°F~+104°F) -typically ±0.3°C (0.6°F) Better than ±0.8°C (±1.5°F) for other measurements - typically ±0.5°C (0.9°F). Sensor Reaction Time Typically less than 5 minutes (T90) in moving air (1m/s). Capacity Data logging memory : 7770 logs ( 53 days @ 10min logging, 80 days @ 15min logging) Day summary statistics memory (for display on LCD): up for 30 days of Max/Min and duration values Sampling Frequency Adjustable, 30 seconds to several hours Logging Start Options Push button start or specific date & time. Optional start delay of up to 18hours.