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For many applications, radio frequency (RF) measurement is the perfect fit. Though RF moisture meters require constant contact or a known distance and consistent temperature for a proper measurement, they can penetrate further into the sample than other moisture measurement methods. When evaluating the moisture levels in lumber and gypsum, RF sensors can measure through the material to get an average reading of the cross-section. In some applications, that cross-section reading holds far greater importance than measurement methods that only measure surface conditions.
In starch applications, the use of “fringing” fields allows the RF sensor to measure material that is in contact with the device. As long as a consistent amount of material is maintained, the readings are accurate. Therefore, an RF probe can be inserted into a silo or similar type application to measure material in the process with great success.
Material measured with RF should have moisture between 3% and 50%. When the level is below 3%, RF sensors cannot accurately determine changes in moisture. When moisture levels are above 50%, the signal can become saturated.
Common applications for RF moisture measurement include:
Our RF sensors offer the broadest range of frequencies in the industry, from 2KHz to 2MHz. The right applications for a specific moisture measurement technique depends on many factors, and we have the decades of expertise to help you determine the best fit for your needs.
Customers depend on our RF sensors’ rugged design and accurate measurements. We’ve also added enhancements that include IoT and AI functions, making our RF sensors the best in class for your radio frequency measurement needs.
With the SMART III RF moisture sensor, moisture results are continuous, instantaneous and non-destructive. It is widely used across a variety of applications, including:
The SMART III Radio Frequency Moisture Sensor employs a radio frequency (RF) power loss technique that operates at 2 Megahertz. The sensor projects an RF field into the sample and measures the loss or change in RF dielectric constant as affected by moisture. The System Response is a measure of the total water in the RF field, which is directly related to the moisture content of the material. The RF power loss absorption principle is a Finna Sensors patented feature. For high temperature environments up to 485°F (250°C), the high temperature RF sensor can detect product moisture inside a kiln or dryer. Its unique open frame construction minimizes dirt and contaminant accumulations.
Key Features
With a number of options available to accommodate unique environments, the SMART III RF moisture sensor is a proven choice for manufacturers.
*Monitor required to complete system (Sold Separately):
The SMART III RF Probe connects to the SMART III RF / Oscillator Box. It’s installed in chutes and silos for measuring powders or granular materials. The system includes Oscillator Box and RF Probe Assembly with 8’ cables. Probe lengths available from 6” to 48”. Touchscreen console is required (sold separately).
From continuous measurement to lab to final quality control checks, we can help you create the right integrated solution to optimize your efficiency and increase your profits.
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