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Introducing the latest innovation in concrete monitoring technology: the new concrete relative humidity and temperature monitoring sensor. Designed to revolutionize the way we assess and manage concrete curing processes, this sensor offers unparalleled accuracy and reliability. Continuously measuring relative humidity and temperature within concrete structures provides invaluable insights into the curing process, ensuring optimal strength development and durability conditions. Whether used in construction projects, infrastructure maintenance, or research applications, this cutting-edge sensor promises to elevate the standard of concrete monitoring, enhancing quality control and prolonging the lifespan of concrete structures.

The engineers at HGCR have been hard at work improving the sensor range, battery life, and speed. With VAKKA 2.0, we have increased the speed fivefold. Now, you can spend less time waiting and make decisions faster. With all VAKKA sensors, accuracy matters.   

VAKKA is a durable, waterproof concrete sensor that wirelessly monitors the environmental conditions within the concrete as it hardens. Install the sensor before concrete placement to record temperature and relative humidity. Our patent-pending environmental chamber is unique to the VAKKA system and allows faster and more accurate readings. In addition, it quickly equalizes the surrounding environment, recording measurements within one hour of pouring your concrete.

Our free mobile app and cloud service empower your team to make more confident decisions faster. Your data can be downloaded to the app when a connected device is within the sensor's range and instantly uploaded to the cloud, where it is shared with your team. The app will automatically do the heavy lifting by calculating your calibrated compressive strength and maturity curve, allowing instant access to your temperature and relative humidity readings, plotting your data, and generating reports. 

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​Better Design

  • Take more accurate measurements with better stabilization, reduced fog, and condensation

  • Fast measurement - record data within one hour of placement

  • Measure up to 10 feet (3 meters) deep with an optional probe attachment

  • No drilling required - does not damage concrete

  • Conforms to the following standards: ASTM C1074, ASTM 2170, ACI 318, most DOT specifications

Team-Based Mobile App:

  • Save time and money

  • Quickly collect data from any sensor

  • Instantly share data with your team keeping everyone informed

  • Generate and print environmental condition report

  • Individually identify each project and sensor within the app

American Company: 

  • Headquartered in Chicago, IL 

  • Owned by U.S Army veterans

  • Designed and assembled in U.S.A.



  • Estimation of concrete strength

  • Drying level in concrete floors

  • Effectiveness of curing conditions

  • Optimization of flooring installation

  • Water penetration in concrete

  • Monitoring humidity gradients

  • Determine the maturity equation of your mix

Step 1: Install Sensor
concrete sensor connecting to mobile application
Step 2: Sync Sensor With App


  • Wireless technology

  • Durable and waterproof

  • Continuous data gathering

  • Fast and easy installation

  • Long battery life


  • Free Android and iOS app

  • Real-time data display

  • Instantly shares recorded data with your entire team

  • Interactive trend plotting of data

  • Easy data organization between multiple sensors

  • Full report generation

pouring concrete on construction site

Available Models

  • VAKKA-T – Records temperature

  • VAKKA-T1 – Records temperature up to 3 feet (1 meter) depth

  • VAKKA-T3- Records temperature up to 10 feet (3 meters) depth

  • VAKKA-HT – Records temperature and relative humidity

  • VAKKA-HT1 – Records temperature and relative humidity up to 3 feet (1 meter) depth

  • VAKKA-HT3- Records temperature and relative humidity up to 10 feet (3 meters) depth

  • VAKKA-RH MAX - Records relative humidity with an extended battery life

Step 3: Pour Concrete
recording data from wireless concrete sensor

When to Use

  • When estimated concrete strength is critical to the construction

  • Time-sensitive projects where formwork removal may be critical

  • Ensure proper moisture content prior to flooring installation

  • Flatwork and pavement

  • Deep and shallow foundation 

  • Mass concrete placements

Step 4: Record Your Data
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