How Do You Properly Implement Smart Ear Tags on Your Farm?

📅 June 18, 2026 👤 By Cathy

Plan a NexAgri-Sense smart ear tag rollout around the selected model: survey coverage, check devices before fitting, bind each tag to the correct animal, then verify data and ear condition. Use a small first group to check the workflow before expanding installation across the herd.

A close-up of a smart ear tag on a cow's ear in a clean barn

How Do You Conduct a Thorough Site Survey Before Installation?

Map where animals will be kept and where reports must reach the platform. Test the proposed network at those locations before fitting the full herd.

Match the ear-tag model to the data required and the network available on site. Map the barns, handling area and grazing routes, then test reporting at the places animals actually use. Confirm gateway or cellular requirements, power and backhaul before scheduling fitting.

Schematic of a smart ear tag reporting through a gateway to a platform

Use the farm layout to plan a coverage check. Include resting pens, feed and water points, the handling area and pasture routes. Test with the proposed device and reporting interval, record the last received timestamp at each location, and note gaps near metal structures, terrain changes or distant areas.

Configuration Confirm Before Fitting Test on the Farm
NB-IoT Selected model, supported network and service availability Successful reports across the intended animal routes
LoRaWAN Tag and gateway compatibility, gateway position, power and backhaul Reception in each pen or pasture area, including obstructed points
BLE Selected device functions, gateway coverage and network connection Reception around occupied barns and handling areas
4G / GPS Models Cellular service, location-reporting settings and power configuration Location and data reports on the intended grazing routes

The current NexAgri-Sense range includes different sensing and communication configurations. Select a temperature, activity, identification or positioning function from the actual model specification; those functions are not identical across the range.

Plan a suitable cattle restraint facility, trained operators and a clean work area. Inspect fences, headlocks and troughs for snagging points, and review previous ear-tag losses before selecting the attachment and fitting position. Start with a small group and review retention and reporting before expanding.

What's the Correct Way to Physically Install Smart Ear Tags?

The attachment method matters as well as the electronics. A study of a 32g sensor ear tag with twin-pin fixing recorded ear injuries and tag migration during use.1 That finding supports checking design, fit and follow-up; it does not establish an installation procedure for every electronic tag.

Check that each tag is activated and reports to the intended platform before fitting it. Match the tag, locking component and applicator to the selected model. Record the device-to-animal pairing, then use that model's placement and cleaning instructions during installation.

Close-up of a heavy-duty ear tag applicator properly loaded with a thick smart cattle sensor tag and special pin

Before fitting, activate the devices using the selected model's setup process. Check that the device ID appears on the intended platform, confirm a recent report and review the battery indicator or voltage against that model's acceptance criteria. For temperature-sensing models, use the supplied pre-installation check method; a room reading alone is not a calibration of ear-temperature measurement. Record devices that fail the check and investigate them before fitting.

Once the device check is complete, use a recorded fitting sequence:

  1. Prepare the model and tool: Match the ear tag, locking component and applicator or adapter. Check the supplied placement drawing and cleaning instructions. Clean the applicator and use a compatible disinfection method for the components that require it; do not apply one alcohol-soaking recipe to every electronic housing.
  2. Bind the identity: Scan or enter the device ID, select the animal record and verify the pairing on screen. Record the installation date, animal ID and tag ID so a later data problem can be traced to the correct device.
  3. Fit the tag: Use a suitable cattle restraint facility and a trained operator. Load the matching components, follow the selected model's ear position and orientation, and check that the fastening has closed and leaves the intended fit. Keep the handling area and tools clean. Resolve weak coverage through the network check; do not change the wearing side simply to improve a signal.
  4. Check before release: Confirm the tag is secure and the animal record is correct. Check for bleeding, tissue caught in the fastening or contact that would restrict normal ear movement. Record any problem for the farm's animal-care and installation team.

What Checks Are Necessary After Attaching the Ear Tags?

The tags are on, but the job isn't done. Without follow-up, you might miss installation errors, leading to data gaps or animal health issues.

After installation, perform both data and physical checks. Monitor the data platform for at least two upload cycles to spot any anomalies. Physically inspect the ear for a week to check for signs of infection, swelling, or issues with the tag snagging on equipment.

A farmer checking a cow's ear after a smart tag has been installed

After fitting, check at least two configured reporting cycles and compare the device ID, animal record and last received timestamp. If data are missing or unusual, investigate in this order:

  1. Identity and settings: Confirm that the device is bound to the correct animal and that activation, reporting interval and intended sensor functions are correct.
  2. Last report: Check when and where data last arrived. Compare other devices in the same area to identify a shared coverage or network issue.
  3. Network path: Check gateway power, backhaul and platform connection, or the cellular service used by the selected model. Test reception at the affected animal location.
  4. Device and fit: Inspect the tag and fastening for damage and review the model's battery or fault indication. Escalate the recorded findings for service or replacement when a device fault is confirmed.

Continue physical checks during the first week and in the normal herd routine. Keep a record of ear condition, retention and any refitting or replacement.

At the same time, you need to do physical checks.

  • Placement: Check the tag's location and fit against the selected model's drawing. If the fastening, placement or ear tissue looks wrong, restrain the animal for assessment and follow the model's removal or refitting procedure with a trained operator; do not routinely cut and re-pierce the ear.
  • Animal Health: For the next week, keep a close eye on the cows' ears. Look for any excessive redness, swelling, or pus, which could signal an infection.
  • Snagging: Also, observe how the tag interacts with your farm equipment. Is it getting caught on headlocks, fences, or water troughs? A well-designed tag shouldn't, but it's always best to check. This final step ensures the long-term success of your system and the well-being of your herd.

Conclusion

Complete the rollout when the device IDs match the herd records, the intended data arrive and the fitting checks are satisfactory. University of Missouri researchers describe using sensor-ear-tag activity data to study estrus detection and breeding timing.2 That is an example of a defined management application; confirm the functions and alert workflow of the selected NexAgri-Sense configuration before scaling the project.



  1. Gobbo Oliveira Erünlü, N., Rieder, S., Kuntzer, T., Bérard, J., and Wellnitz, O. (2023). Effects of sensor ear tags with twin pin fixing system on health and well-being of cattle. Schweizer Archiv für Tierheilkunde, 165(7), 512–523. doi:10.17236/sat00399. ↩

  2. Missouri Agricultural Experiment Station, University of Missouri. (2025, April 21). Cattle in the cloud: Wearable tech revolutionizes ranching. Research news. ↩