You’ve arrived at this blog post because you’re interested in evaluating and selecting from the plethora of concrete testing thermometers available in the market. Before we dive into suggesting some of the best thermometers we’ve come across, it is essential to address the importance of testing for concrete temperature, why doing so may prevent risks such as structural damage, and how opting for the correct thermometer may enhance and simplify your concrete project.
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Concrete Temperature: Too High or Too Low?
The ASTM C1064-86 prescribes that the concrete temperature must remain between 80.1oF and 95oF or between 26.7oC and 35oC but can be altered according to project specifications. If the concrete mix is poured at a higher internal temperature, it runs the risk of encountering several problems, one of which is that your concrete could crack due to quick and premature evaporation.
Alternatively, if the concrete mix is poured at a temperature lower than 25oF, the concrete could freeze. This could result in multiple types of problems, one of which includes the concrete becoming severely brittle.
As you can see, if your concrete temperature is too high or too low, your project is vulnerable to damages that are time-consuming, expensive, and often simply avoidable.
Commercial Concrete Temperature Thermometers
Below, we review a few thermometers that may be ideal to implement in your next concrete project.
Offered by the concrete testing device manufacturer, Giatec, the wireless SmartRock sensors are approved by the ASTM C1074 and the ACI, are fully embedded on the rebar with no wires or testing field-cured cylinders required, are easy-to-use, and allow for quick decision-making onsite. With this device, you can closely monitor temperature differentials between the core and edge of your mass pours with its dual temperature capability. The SmartRock app helps you tag sensors quickly via a QR code, receive proactive custom alerts and smart notifications, and provide multiple-company access to project data. The data is sent wirelessly to the cloud and you can also get alerts with Giatec 360TM, allowing you to easily follow your thermal control and curing plan. Giatec 360 is an advanced web-based dashboard for managing concrete pours, predict concrete temperature, analyze temperature differentials, and set up thresholds for your pours.
Provided by Wake, Inc., this durable temperature monitoring (per ACI 207.4R-05) device offers both handheld and remote wireless versions, allowing you to collect concrete temperature logs onsite or offsite. Their sealed wireless concrete temperature loggers either contain their own wireless radio frequency identification device (RFID), chip and either an internal temperature sensor or external sensor probe as well as a remote logger with a cloud connection that comes with one ambient sensor and 4-26 temperature sensor connections that allow external sensor probes to connect with an available lead.
Sensohive’s Maturix uses thermocouple sensors for monitoring concrete temperature. One end of the thermocouple wires is embedded in the concrete, the other end needs to be connected to a node, and each wire needs to have a separate node. The nodes record the concrete temperature data and send it wirelessly to the cloud.
ONSET’s HOBO provides multiple thermocouple wires that can be connected to a HOBO box which is installed outside the concrete, a regular logger which records the data that can be processed on a computer later, and a wireless logger that records and sends the temperature data via Bluetooth to a mobile device. This device has compact, weatherproof housing with built-in mounting, making it compatible with harsher climates. Their free HOBOconnect app lets users observe data in real time.
If you need to opt for going the more analog route, the Dial Face Concrete Thermometer (25oF – 125oF/-3.9oC – 51.7oC) from Myers Construction Materials Testing Equipment might be the one for you. It is a dual range concrete thermometer which is also provided with a plastic protective sleeve. Another feature included with this device is an adjustable mounting clip.
Converge Mesh includes wired sensors connected to wireless nodes that send data to a local hub which then gets transmitted to a cloud. Their new sensor, which is called Signal, is a wireless sensor that is fully embedded in the concrete. This concrete temperature data can also be transmitted to a local hub or mobile device and then to the cloud through cell network.
How to Choose The Right Concrete Thermometer for Your Project
As you can see, there are multiple concrete thermometers at your disposal––ranging from wired thermocouples and traditional analog thermometers to handheld options and wireless temperature sensors. The thermometer you pick ultimately will depend on a range of factors such as your project specifications, whether you prefer collecting concrete temperature logs onsite or offsite, and if wireless alternatives may be more compatible with your project as opposed to wired methods. Whichever path you pick, we hope our blog helped ease that decision for you!
Note: All company, product/service names, and brands used in this article are the property of their respective owners. This article is intended to be used for informational purposes only.