ACR Systems Inc. (ACR), manufacturer of portable Data Loggers, is a world leader in data acquisition for Concrete Thermals. Located in Surrey, British Columbia, Canada, the company has supplied to Civil Construction projects around the globe thru its dealer network. ACR SmartReaders are an indispensable tool as they are hardened for a rugged environment. ACR’s reputation as a leader in providing proven solutions has made it the product of choice for high profile projects such as Boston Big Dig and WTC Rebuild. The precision electronic monitoring devices measure temperature over time to determine pour strength based on either Nurse-Saul or Arrhenius equations.