Catch heat at the right time.
Otlax smart ear tags monitor heat and send insemination timing to your phone. Activity, rumination and temperature tracking also help you spot potential health concerns early.
- 5+ year battery
- Mobile alerts
- 3-year warranty
Otlax03:40Cow 4871 is in heat
Insemination window: 14:00–18:00 today
Example app notification
Technology and ecosystem
Otlax in 45 seconds
From the smart ear tag to your phone: see how heat and health monitoring brings value to your herd.
The ear tag
Heat detection and health monitoring in one ear tag.
Track heat and insemination timing. Use activity, rumination and temperature data to monitor your animals’ general health too.
- Weight
- Approx. 25 g
- Range
- Up to 200 m
- Wireless
- Bluetooth 5
Designed for the barn
5+ years
Battery life
No charging or battery replacement required.
3 years
Warranty
Ear tags and gateway are covered by a three-year warranty.
IP67
Water and dust resistant
A sealed enclosure with an IP67 protection rating.
Tracking
Temperature changes
Follow temperature changes alongside activity and rumination data.
Your herd, in clear view.
Home
Start the day knowing what to do.
The animals that need you today come first. Heat, insemination and pregnancy counts and upcoming calvings sit on one screen.
Animal details
Each animal’s data, against its own normal.
Rumination, active time and ear temperature are compared with that animal’s own habits. Pregnancy status and the expected calving date are on the same page.
Rumination and activity
See the day’s changes hour by hour.
Follow rumination in a 12 or 24-hour chart. Records such as insemination stay below in the history.
Otlax AI
Ask, and get answers from your herd’s data.
Ask “What should I look at today?” Otlax AI lists the animal due to calve, the tags that have stopped reporting and those with low battery.
Voice call
Ask by voice when your hands are full.
Start a voice call and let Otlax AI answer out loud. Switch to text with one tap whenever you like.
The challenge
A missed heat can mean another 21 days.
When a heat goes unnoticed, the next opportunity is usually about 21 days away. Calving is delayed, affecting milk output and your herd’s income.
Some heats are easy to miss
Heat signs can be subtle in high-yielding cows. Regular observation takes time, especially alongside milking, feeding and fieldwork.
Field reference: 417 days
Calving intervals vary with farm conditions. 417 days is the average from one field study; your own herd’s records may differ.
Field-study reference, ÇOMÜ 2024
About TRY 3,654 per cow per year
Estimated annual benefit when a 417-day calving interval improves by 20 days. Includes additional calves, milk contribution and cost savings, before system expenses.
How it works
Ear tag, gateway, phone. Three simple steps.
01Fit the ear tag
It is fitted like a standard identification tag. The sensor monitors head movement to distinguish eating, rumination, walking and resting. The ear tag also provides temperature tracking.
02The gateway collects the data
A fixed gateway in the barn or a gateway collar in the herd collects information from the Eartags and sends it to the server over the mobile network. No WiFi or computer is needed.
03Get alerts on your phone
When a cow is in heat, see suggested insemination times on your phone. Otlax also helps you track health changes that need attention.
Setup
Two ways to set up. The same simple monitoring.
A fixed gateway for your barn, or a gateway collar for your herd in open lots and on pasture. We plan the right setup for the way you farm.
For the barn
A fixed gateway in your barn
The gateway installed in your barn collects information from the Eartags and sends it to the server using its own SIM card.
Up to 200 metres of range
Coverage depends on walls, metal structures and gateway position. The number of gateways is planned around the size and layout of your barn.
SIM-connected, no WiFi needed
The gateway uses its own mobile connection. It needs suitable network coverage and an electrical supply in the barn.
One unit, two screws
It mounts on a post with two screws. Our team handles the setup with you.
For open lots and pasture
A gateway collar that moves with the herd
Monitor cattle in open lots and on pasture too. The gateway collar does the same job as the barn gateway, from within your herd.
Fitted to one or a few animals
It moves with the herd and collects data from the Eartags worn by nearby animals.
Sends data to the server over 4.5G
It uses the mobile network to send the collected data to the server. You follow your herd in the Otlax app.
Simple in-app setup
Scan. Review. Add.
No lengthy forms to add an ear tag or gateway. The app guides you through each step.
Choose what to add
Open the add-animal or add-gateway flow in the app.
Scan the QR code
Point the camera at the code. If scanning is not possible, enter the code manually.
Confirm the details
Name the animal or gateway, review the details and complete the record.
Let’s choose the gateway type and number based on your barn layout, how your herd spreads across the land and mobile network coverage.
Plan my farm’s setup (WhatsApp, opens in a new tab)Questions
Questions from the farm.
What is a heat detection system, and how does it work?
A heat detection system measures a cow’s activity with a sensor and alerts your phone to changes that point to heat. With Otlax the sensor is an ear tag; its data reaches the barn receiver and then the mobile app. An alert is not a diagnosis: check the animal and decide with your veterinarian.
How is the price calculated, and what do I need for a quote?
Pricing depends on the number of ear tags and gateways, installation and software service. Share your herd size and location on WhatsApp. We confirm a quote for your farm during the conversation.
Will it work if my barn has no internet?
The tags do not need internet access; they connect to the barn’s gateway over Bluetooth. The gateway sends data using its SIM card. Live alerts require mobile coverage and power at the gateway. We can review coverage for your location together.
Can I also monitor my herd in open lots or on pasture?
Yes. A gateway collar is fitted to one or a few animals in the herd. It collects data from the Eartags worn by nearby animals and sends it to the server over 4.5G. It does the same job as the fixed barn gateway, from within the herd, so you can follow the data in the Otlax app. We plan the number of collars and review mobile network coverage for the area where your herd lives.
Could the ear tag break if a cow hits a wall?
The flexible TPU enclosure and IP67 protection provide water and dust resistance for barn conditions. Ear tags and gateways carry a three-year warranty. We can clarify repair and replacement terms with your quote.
Could it hurt the cow’s ear?
The tag weighs approximately 25 grams. Correct placement, hygiene and regular checks are important for ear health. We plan fitting with you during installation.
Does the ear tag need charging?
No. The battery is inside a sealed enclosure and is designed to last more than five years. Power use is reduced while the cow is still and activity monitoring resumes when it moves.
Does it only measure mounting activity?
No. The sensor measures head movement to track eating, rumination, walking and resting. Changes in rumination and activity can help identify health concerns earlier and support your veterinarian’s assessment.
Does it track temperature?
Yes. Otlax smart ear tags provide temperature tracking alongside activity and rumination monitoring. You can assess temperature changes together with the other monitoring data.
Can Otlax help identify early signs of illness?
Yes. Changes in activity, rumination and temperature data can help identify early signs of potential health concerns. Otlax supports general health monitoring and early alerts; it does not provide a definitive diagnosis of a specific disease. Check the animal when an alert arrives and discuss your findings with your veterinarian.
Is data lost if the power or internet goes down?
The ear tag stores measurements in its own memory and sends them when the connection returns.
How many cows can the system support?
We plan installations for herds of 15 to 500 cows. The number of gateways depends on the size and layout of the barn.
How quickly can I get service?
Service and replacement times depend on your location and the issue. Share your location so we can clarify local support and warranty arrangements at the quote stage.
What happens to the system if your company closes?
The system uses standard industrial components that are also available from other manufacturers. Data export and service continuity provisions are addressed in the contract. We can discuss these details with you.
Published research
Heat detection using activity sensors.
These independent studies used ear sensors from other manufacturers. Results vary by herd and research method; they are not presented as measured Otlax product performance.
Results from published studies
Let’s plan the right setup for your herd.
Share your location and herd size. We can review your barn’s connectivity, the gateways you need and a quote for your farm.
Contact us by email