Check the listing for details. ACR Systems TRH-1000-SP Two Channel Temp and RH Data Logger Starter Pack NEW. Condition: New. Listed at 299.99 USD. ACR Systems TRH-1000-SP Two Channel Temp and RH Data Logger Starter Pack NEWThe TRH-1000 is an economical and easy-to-use temperature and relative humidity data logger. With its precision calibrated internal temperature and relative humidity sensor, simply place the logger in the field and leave it to record. Once the desired information has been recorded, plug the logger into the serial port of your computer and begin downloading and viewing the logged data with ACR's TrendReader® 2 Express software. No cables, wires or accessories are required, making the TRH-1000 the ideal data logger for quick and accurate temperature and humidity measurements in a variety of applications. Includes: Data Logger, TrendReader® 2 Express Software, serial to USB Adapter cable and Quick Start Guide Specifications Size 25.4 mm x 58.4 mm x 81.3 mm (1" x 2.3" x 3.2") Weight 74 g (2.6 oz) Case Material Cycoloy® (GE Plastics) C120 ABS + Polycarbonate Operating Limits -40 to 70°C (-40 to 158°F) and 0 to 100% RH (non-condensing) Clock Accuracy +/- 2 seconds per day Battery 3.6 volt Lithium, 1 Amp-Hour Battery Life 5 years under normal use (factory replaceable) Memory Size 64 KB (32,676 readings per channel) Sampling Methods First-in First-out, Stop When Full, Delay Start, or Spot & Average Sampling Intervals User selectable from 8 seconds to 34 minutes; readings stored to memory can be spot or averaged over the sample interval (except for the 8 second interval) Resolution 8-bit (1 part in 256) PC Requirements Windows PC with a least 256MB RAM, 250MB of hard drive space and one free serial or USB port depending on interface Software Requirements TrendReader® 2 Express or TrendReader® 2 (Compatible with Windows XP, Windows Vista & Windows 7 - 32 bit & 64 bit) Temperature Sensor Type CMOSens® (by Sensiron) Temperature Sensor Range -40 to 70°C (-40 to 158°F) Temperature Sensor Accuracy +/- 0.6°C @ 25°C (+/- 1.0°F @ 77°F); +/- 2.0°C from -40 to 70°C (+/- 3.6°F from -40 to 158°F) RH Sensor Type CMOSens® (by Sensiron) RH Sensor Range 0 to 100% RH (non-condensing) RH Sensor Accuracy +/- 4% RH between 20 and 80% RH; otherwise +/- 5% Calibration Factory calibration verification and NIST certificates are available upon special request.