Bids Are Invited For Data Logger: Term - Digital Hygrometer, Portable, With Datalogger, Approximate Temperature Measurement Range -30 To +70 Degrees Centigrade, Moisture Measurement Range 0% To 100%, Resolution Of At Least 0.1 (% And Ur), Accuracy Of Temperature Measurement Of At Least 0.8 Grade Centigrade, Moisture Measurement Accuracy Of At Least +3 % Ur, Total Memory Of At Least 15,000 Records, Data Stored At Intervals Of 1Seg. At 2 Hours, It Can Be Discharged To Any Computer, Non-Valatil Memory, So That The Stored Data Is Not Lost If The Battery Is Over, And Rechargeable Battery.