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ACR Temperature & Humidity Data Loggers

ACR Systems – JR-2000 / TRH-1000

ACR Systems Small Temperature & Humidity Data Loggers 

ACR’s small JR-2000 USB Temperature Data Logger and TRH-1000 Humidity Data Logger, represent the industry’s longest lasting small data loggers, both loggers boasting a 5 year battery life and 3 year warranty. These reliable and solidly built data loggers are ideal for applications such as storage, transport, and environmental monitoring. 

With loggers as rugged and long lasting as these, you can really “set and forget” without needing to be concerned about when the battery (or entire logger) will need to be replaced. The software is intuitive and easy to use – plug the logger into your PC to configure it, then place the logger in the desired location to record. When you need to check the results, simply plug the logger back into your PC to download the data via the TrendReader JR software.

ACR data loggers

JR-2000 Longest Lasting USB Temperature Data Logger

The JR-2000 has an industry leading temperature range, battery life and warranty, providing the ideal temperature logging solution for in-building, storage, transport, and environmental monitoring applications across a wide range of industries.
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The new JR-2000 has an industry leading temperature range, battery life and warranty, providing the ideal temperature logging solution for in-building, storage, transport, and environmental monitoring applications across a wide range of industries. With precisely calibrated internal temperature sensor, simply place the logger in the field and leave it to record. Once the desired data has been gathered, plug the logger into a USB port on your computer to download and view logged data.

Applications: Food process verification, pharmaceutical storage, laboratories, transportation of
temperature-sensitive goods, equipment run time monitoring, HVAC system testing and balancing, etc.

Key Features

  • Widest temperature range (-40°F to 185°F) (-40°C to 85°C)
  • Longest battery life even at extreme temperatures
  • Industry leading storage size at 100.000 samples
  • Configurable sample rates from every 10 sec. to every 18 hrs.
  • Large, multi-color visual status & alarm indicator
  • Compact, lightweight design that easily fits crowded USB ports
  • Easier-than-ever Windows software (included) with easy configuration wizard (included)
  • 3-year warranty


Minimum Battery Life 3 years, all conditions
Typical Battery Life 5+ years, (-40°F to 85°F)  (-40°C to 30°C)
Storage Size 100,000 samples (11 days at 10s sample rate (2 months at 1-minute samples)
Sample Rate 10 seconds to 18 hours
Temperature -40°C to 85°C (-40°F to 185°F)
Humidity 0 to 95% RH (non-condensing)
Alarm High and Low Temperature thresholds (latched or current value)
Status Indicator Flash every 10 seconds (Red: alarm or full, Green: logging, Blue: delayed start)
Size 80 mm x 30mm x 16mm (3.15″ x 1.18″ x .63″)
Weight 37g ( 1.3 oz)
Logging Mode Stop-When-Full or First-In-First-Out
Sample Method Average or spot reading
Start Delay Up to 18 hours
Clock Accuracy +/-2 seconds / day
Connector USB 2.0 type A
Sensor Accuracy 0°C to 70°C (32°F to 158°F)  +/-0.2C <0°C and >70°C (<32°F and>158°F):  +/-0.6°C or better
Calibration Period 1 year
Resolution -10°C to 50°C (14°F to 122°F):  0.03°C -35°C to -10°C (-31°F to 14°F):  0.1°C or better 50°C to 85°C (122°F to 185°F)  0.1°C or better
Mounting: Multiple mounting options
Software: ACR TrendReader® JR (compatible with Windows 7, 8 & 10)

Data on JR-2000 (pdf, opens in a new tab)

JR-2000 Single Channel Temperature USB Data Logger, includes free TrendReader-JR Software Download Link: $235+GST  (03/19)

TRH-1000 Temperature & Humidity Logger

TRH-1000 logger is a economical dual-channel data logger ideal for quick, accurate temperature and relative humidity measurements in the field.
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TRH-1000The TRH-1000 is a low-cost, 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 your computer and begin downloading and viewing the logged data with ACR’s simple TrendReader® 2 Express Software or feature filled TrendReader® 2 Software. The TRH-1000 is the ideal data logger for quick and accurate temperature and humidity measurements in a variety of applications.

Applications: Building comfort monitoring, food process verification, pharmaceutical and laboratory storage monitoring, transportation monitoring, energy management, HVAC system testing and balancing, etc.

Key Features

  • Two channels for recording temperature and relative humidity
  • 64KB memory for almost 33,000 readings per channel
  • 5-year battery life
  • 3-year warranty


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® Express or TrendReader® (Compatible with Windows 7, Windows 8 & Windows 10)
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.

Data on TRH-1000 (pdf, opens in a new tab)

TrendReader Express software for Windows is required, and included in the Starter Pack. The TRH-1000 can plug directly into a DB9 serial COM port connector on a computer (RS232 cable is not included), or to a USB port via a USB-Serial cable (included with the Starter Pack, see below).

TRH1000 Temperature & Humidity Logger only (not including USB-serial cable): $385+GST  (03/19)

TRH1000-SP Temperature & Humidity Logger Starter Pack, including USB-serial cable, Software and Manual: $495+GST

Software: TrendReader for Windows


TrendReader Express software is designed exclusively for the JR-1000/1001, Nautilus 85/135 and TRH-1000 data loggers.

TrendReader JR software is designed for the JR-2000 USB Temperature data logger, and a download link is included free with the data logger.

Data collected in ACR Data Loggers is downloaded using the USB or serial RS232 port of a computer.

TrendReader Software features:

  • Simple logger setup window
  • Export data to most spreadsheet formats
  • Multi-graph display
  • Zoom
  • Scale units
  • Add comments
  • Data table view

Updates: TrendReader updates are available free of charge to existing users at the ACR website – downloads.

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