Check the listing for details. Elitech RC-4 Temperature Data Logger USB Recorder w/ External Probe -40℉~185℉. Condition: New. Listed at 22.99 USD. Features Internal Sensor & External Sensor Switch between the internal sensor and external sensor according to a different application and your preference. Audible Alarm Both LCD alarm indication and buzzer alarm available. You won't miss any temperature abnormal. Fahrenheit and Celsius Switch the temperature unit between Fahrenheit and Celsius. The change works on both display and reports. Change the temperature unit on software. LCD Visual Display Powerful LCD indication with key statistic information, convenient to check your data at any time. Start & Stop Logging Press and hold the button for 5 seconds until the “Solid Triangle” icon or “Solid Square” icon shows on the screen, indicating the logger start/stop logging. Data Export Export the data to PDF, EXCEL, or TXT through the free Elitechlog software. The software is available both for Windows and macOS. Export Free Data Report from Software Connect the data logger to your computer and use ElitechLog software to save or export the data. Reset & Reuse the Logger Click "Quick Reset" to reset the orignal parameters settings. Disconnect the device from your computer to start using again. (Please see User Manual for more detailed instructions) Technical Specifications Temperature Measurement Range* Internal: -30℃~+60℃(-22°F~140°F), external: -40°C~+85℃(-40°F~185°F) Temperature Accuracy ±0.5℃/±0.9°F(-20°C~+40℃), ±1°C/±1.8°F (others) Resolution 0.1℃/°F Memory Maximum 16,000 points Logging Interval 10 seconds to 24 hours Data Interface USB Start Mode Press button; Use software Stop Mode Press button; Auto stop; Use software Power CR2450 battery/USB Shelf Life 2 years Certification EN12830, CE, RoHS Dimensions 84x 44x 20 mm Weight 60g *Notice When the external sensor is inserted to the logger, the internal sensor will not work. Free Elitechlog Software for Windows&macOS Log Clock: Not configurable. But the time will sync with that on the computer after our user clicks the Save Parameter button under the Parameter tab. S/N: Not configurable. Trip Description: Configurable. The info entered here will be shown on the report, it can be used to differentiate one logger from another. Log interval: Configurable. This means how often our user wants the logger to perform a reading, it can be 10S, 1minute, or 1day. Start Delay(H): Configurable. This means after you press the start button on the logger, how long it would wait to officially start logging. Press button: Configurable. This means after we press the start button for 4 seconds on the logger to start logging. Temperature Unit: Celsius or Fahrenheit Optional. High/low limit: Configurable. The upper and lower alarming point you want to set. RC-4 RC-4HC LogEt 8 THE GSP-6 RC-5 Temperature Range -40°F to 185°F(-40°C ~+85°C) (External Sensor Only)) -40°F to 185°F(-40°C ~+85°C) (External Sensor Only)) -22°F~158°F (-30°C ~70°C ) -40°F ~ 185°F(-40°C ~+85°C) -22℉~158℉(-30°C ~+70°C) Humidity Range NO 10~99%RH 10~99%RH 10%~90%RH NO Record Capacity 16,000 Temperature Points 16,000 Temperature Points, 16,000 Humidity Points 16,000 Temperature Points, 16,000 Humidity Points 16,000 Temperature points, 16,000 Humidity points 32,000 Temperature Points Log Interval 10 seconds- 24 hours 10 seconds- 24 hours 10 seconds- 24 hours 10 seconds- 24 hours 10 seconds- 24 hours