... RS485 Modbus protocol .USB drive KH300AG Universal Paperless Temperature Data Logger.96x96x80mm,TFT color LCD.Universal 6 inputs.RS485 ... lab, Marine, Sewage treatment etc Memory Flash Drive Data SavingVariours DisplayFeaturesUSB Download Data by Flash DriveConnetionSpecificatonAccuracy: 0.2 grade, ±(0 ... 2, 3, 4, 5,6s……Record time: 45 (Unit Days) x Recording Interval Time/Channel No.Power-off protection ...