ACR Conservation Logger
Four-Channel Temperature, RH and 5V
Input Data Logger

  • Monitor and record temperature, RH and any parameter with a 0-5 VDC output
  • Visual alarm
  • 12-bit resolution
  • 5-year battery life
  • 128 KB memory (87,000 readings)
  • Fast sample rates (up to 25 samples per second)
  • Network capable
  • Remote access via modem or Ethernet. User configurable

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Product Information

Datasheet 83 KB
Memory Size

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The Conservation Logger is a self-contained temperature and relative humidity logger with two external channels for use with a variety of sensors. It is equipped with an LED light that will alert the user if measurements fall above or below user set limits.  With 12-bit resolution, user selectable sample rates, 50 year battery life and an LED light for visual alarming, it is the ideal solution for museums , libraries, and archives where temperature humidity and light are important factors to the preservation and conservation of precious, valuable items.
Conservation Logger Specifications
No. of Channels
  • One for Temperature
  • One for RH Sensor
  • Two external Sensors for any type with a 0-5VDC output
Sampling Methods 1. Continuous (First-in, First-out)
2. Stop when full (Fill then stop)
Sampling Rates User selectable rates from 25 per second to once every 8 hours
BP-101 Battery Pack or PS-201 Power supply is required for sample rates faster then 8 seconds
Clock Accuracy +/- 2 seconds per day
Memory Size 128 KB (87,000 readings)
Temperature Sensor Type NTC Thermistor
Range -40 to 70°C (-40 to 158°F)
Accuracy +/- 0.2°C over the range 0 to 70°C (+/- 0.3°F over the range of 32 to 158°F)
Resolution 0.03ºC at 25°C (0.05ºF at 77°F); better than 0.07ºC (0.12°F) between -25 and 70°C (-13 and 158°F); better than 0.13ºC (0.23°F) between -40 and -25°C (-40 and -13°F)
RH Sensor Type Capacitive thin polymer film
Range -0 to 95% RH
Accuracy +/- 3% RH from 10 to 90% (-20 to 40ºC [-4 to 104ºF])
Resolution Better than 0.04% RH between 25 and 60% RH at 25ºC (77ºF)
External Sensor Range Range Any two sensors with a 0-5 VDC output
Operating Limits -40 to 70°C (-40 to 158°F)
Resolution 12-bit
Power Source Battery 3.6 volt Lithium, 1 Amp-Hour
Power Consumptions 5 years under normal use (factory replaceable)
Battery Life 10 Years under normal use
General Specifications Size 107 mm x 74 mm x 22 mm (4.2" x 2.9" x 0.9")
Case Material Noryl plastic
Mounting Magnetic backing and locking eyelet
Certification Certified to CE standard EN50082-1: 1992 (European Generic Immunity) covering ESD, RFI, and EFT/B
Meets CE Standards EN55011 Class B: 1991 (European Radiated Emissions) and CISPR Class B: 1991 (International Radiated Emissions)
Ordering Information
ACR TrendReader 2 Software required for usage
Model Description Buy Online Price
ACR Systems Conservation Logger - 128 KB Four channel, 12 bit, 128 KB data logger Discontinued
MFR ID: 01-0228
ACR Systems TRS2-FULL INSTALL TrendReader 2 Full Install CD. (Latest version) Buy Now $109.00
TRS2UPGRADE  ACR Systems TRS2-UPGRADE TrendReader 2 Upgrade CD. (Requires a previous version of TrendReader Standard.) Discontinued
TRS2WIC101  ACR Systems TRS2-W/IC-101 TrendReader 2 Interface Package (IC-101) Software CD & Serial Port Interface cable for SR/SRP data loggers Discontinued
MFR ID: 01-0226
ACR Systems TRS2-W/IC-102 TrendReader 2 Interface Package (IC-102) Software CD & USB Interface cable for SR & SRP data loggers Buy Now $189.00
Included Accessories
  • 1 - Users guide
Optional Accessories
MFR ID: 01-0106
ACR Systems SC-100 General Purpose Briefcase style, locking, customizable logger & accessory storage case Buy Now $119.00