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ACR Data Loggers out-perform and out-last competitors products due to the construction techniques and materials chosen to guarantee that data is available at the end of the recording session.

ACR is committed to providing superior products and service as demanded by leaders in industry. Not all data loggers are equal and the axiom “You get what you pay for” still holds true. All of ACR’s products are designed and manufactured under a rigorous quality control scheme that allows us to back up our claims with the best warranties in the business.

What are the differences between ACR Data Loggers and others?

  • ACR has the longest proven Battery Life: 5, 10 and 15* years depending on model / application
  • All our Data Loggers are protected from harsh environments
  • Convenient interfaces between workstation computers and device networks
  • Built under ISO9001:2008 processes focused on customer satisfaction
  • *15 years expected battery life when connected to external power supply


Multi-channel Configurable Data Loggers

ACR SmartReader data loggers are multi-channel, user configurable data loggers that monitor a variety of parameters. Durability is assured with a 3-year logger warranty and 10-year battery life. It is important to note that on competitive products if the replaceable battery comes loose or dies you will not get data – lost time and effort far outweighs any price difference. The SR has more available memory as a result of using a 8-bit converter which is sampled 4 times every 8 seconds for extra stable readings. When the logging interval is set longer than 8 seconds, the readings are further averaged giving a quantitative result (with the exception of the SR7 when Battery Switch is enabled). Software Packages are purchased separately as they can support more than one device.

SmartReader 1 2-Channel Temperature Data Logger

SmartReader 2 4-Cannel Relative Humidity and Temperature Data Logger

SmartReader 3 4-Channel AC Current and Temperature Data Logger

SmartReader 4 5-channel pressure, temperature & RH data logger

SmartReader 5 3-channel temperature data logger

SmartReader 6 7-channel temperature data logger

SmartReader 7 8-channel process signal data logger

SmartReader 8 8-channel temperature data logger

SmartReader 9 3-channel pulse data logger


  • Record: Temperature, Relative Humidity, Current, Voltage, Pressure, Process Signals, Pulse
  • Better than 0.5% FS Resolution – most sensors have an inaccuracy of 1% or more
  • 32kB Memory – 32,768 Readings divided among number of channels enabled
  • Remote access via Modem or Ethernet – local or long distance
  • Ruberdized conformal coating protects electronics from harsh environments
  • 3-Year Warranty and 10-Year Battery guarantee data is never lost

Common Specifications

Size 107 mm x 74 mm x 22 mm (4.2″ x 2.9″ x 0.9″)
Weight 110 g (3.75 oz)
Case Material Noryl® plastic
Operating Limits -40 to 70°C (-40 to 158°F) and 0 to 95% RH (non-condensing)
Clock Accuracy +/- 2 seconds per day
Battery 3.6 volt Lithium, 1 Amp-Hour
Power Consumption 5 to 10 microamps (continuous)
Battery Life 10 years under normal use (factory replaceable)
Mounting Magnetic backing or locking eyelet
Memory Size 32 K (32,768 readings)
Sampling Method 1. Continuous (First-in, First-out)
2. Stop when full (Fill-then-stop)
Sampling Rate User selectable rates between 8 seconds to once every 5 days
Resolution 8-bit (1 part in 256)
External Connector Removable screw-type terminal strip with Common (-) connection
PC Requirements Windows PC with at least 256MB RAM, 250MB of free hard drive space and one free serial or USB port
Software Requirements TrendReader® 2 [compatible with Windows® XP SP4 (32bit), Windows Vista SP2 or Windows 7 (32bit or 64bit)]
Internal Temperature Sensor Type NTC thermistor (10,000 ohms @ 25°C [77°F])
Internal Temperature Sensor Range -40 to 70°C (-40 to 158°F)
Internal Temperature Sensor Accuracy +/- 0.2ºC over the range: 0 to 70ºC (+/- 0.3ºF over the range: 32 to 158ºF)
Internal Temperature Sensor Resolution 0.4ºC (0.7ºF) @ 25ºC; better than 1ºC (1.8ºF) between -25 and 70°C (-13º and 158ºF); better than 2.0ºC (3.6°F) between -40 and -25°C (-40ºF and -13ºF)

coming soon