This 3D Printed Sensor Could Save Dairy Farmers a lot of Moooooo-ney! – 3DPrint.com

A study recently published in Nature Communications details a ground-breaking 3D printed sensor that could save US dairy farmers nearly a billion dollars annually. The device is able to detect subclinical hypocalcemia (SCH) in cows— a condition notoriously difficult to diagnose— and offers a promising solution to a persistent problem within the dairy farming world. 

Now, if you’re not a dairy farmer, I don’t blame you for not being familiar with subclinical hypocalcemia, also known as milk fever. It’s not something I typically think about when I pick up my gallon of whole milk from Walmart either. But, within the dairy industry, it’s a large concern. 

SCH occurs when a cow’s calcium levels drop below a certain level without visible symptoms. It’s typically seen in cows right after calving and has been estimated to affect about 50% of mature dairy cows and 25% of first time calvers. The disease can lower milk production, cause paralysis, and compromise the cow’s immune system, leaving them vulnerable to other illnesses. Some reports even estimate the annual losses due to SCH around $8000 per 100 cows. 

So far, detecting SCH has been challenging due to the time and cost involved with commercial analyzers. However, researchers from Virginia Tech are trying to change that with this new sensor.

Integration of 3D-printed sensor with milking machine for cow side and continuous measurement of Ca2+ and P in milk samples. Figure was created using images from BioRender.com released under a CC-BY 4.0 license. (Photo Credit: Nature Communications)

3D printed milk sensor made by the researchers at Virginia Tech. (Photo credit: Nature Communications)

Their sensor was 3D printed using a Form 3 SLA printer and designed to detect the ratio of calcium ions (Ca2+) to phosphate ions within milk samples. Their device takes advantage of the natural wrinkles caused by the SLA printing process to increase the sensing surface area and increases the overall sensitivity of the device to attomolar  precision (600 molecules per cubic centimeter). Incredibly, results come back within 10 seconds, and the device was shown to be very accurate for both milk and blood samples. 

c-e) SEM images of the Au deposited on the wrinkled 3D-printed sensor in different magnifications with primary and secondary pattern indicated. f) SEM image of final coated sensor. (Photo credit: Nature Communications)

If implemented farm-side, this sensor could enable quicker diagnosis of milk fever, reduce the losses associated with SCH, and help keep dairy cows healthier throughout their lifetime. While the potential of this device is clear, further development will be needed before widespread adoption.

All in all, this device follows a larger trend in farming and agriculture with the adoption of 3D printing. The low costs, on-demand production, and effectiveness of the technology make it an ideal match for the industry. As farming continues to embrace innovative solutions like this sensor, I could see a future where 3D printing plays a central role in improving animal health, sustainability, and overall efficiency, ultimately transforming the way food is produced and delivered.

The full article can be found here.