134.2kHz EM4305 TPU Sheep Ear Tag for Livestock Traceability
Material:TPU
Chip:EM4305
Application:Sheep
Product name:EM4305 Sheep Ear Tag
Read-Write Electronic Sheep Ear Tag with FDX-B & HDX Support
The SynTek EM4305 sheep identification tag is a passive, low-frequency electronic ear tag purpose-built for sheep and goat management. Unlike one-time-program (OTP) chips such as the EM4100, this transponder allows full read-and-write access - meaning the stored data can be updated in the field as animals change ownership, enter new breeding programs, or move across holdings. This reprogrammable capability supports both FDX-B and HDX modulation under ISO 11784/11785, delivering dual-protocol flexibility that single-mode transponders lack.
The housing is injection-molded from Thermoplastic Polyurethane (TPU), a material softer and more biocompatible than rigid polyamide or standard plastic. The two-piece male-and-female construction features a precision-ground stainless-steel pin that punctures cleanly, promoting faster wound healing and lower infection rates. Once locked, the anti-tamper snap mechanism prevents unauthorized removal - an important requirement for government-regulated livestock traceability programs in the EU, Australia, and across Africa.
Operating at 134.2 kHz, this low-frequency identification device maintains consistent read performance even when the transponder is covered by thick wool, wet fleece, or mud - conditions where higher-frequency UHF solutions can suffer signal attenuation. For large-scale sheep stations and cooperative farming networks that rely on handheld stick readers at gates, races, and shearing sheds, this frequency advantage translates into faster throughput and fewer missed reads.
EM4305 Sheep Tag - Full Parameter Sheet
Every parameter is optimized for long-service outdoor use on sheep and goats in all climates.
| Product Name | EM4305 Sheep Ear Tag |
| Material | TPU (Thermoplastic Polyurethane) - medical-grade, UV-stabilized |
| RFID Chip | EM4305 (EM Microelectronic), read/write capable |
| Working Frequency | 134.2 kHz (Low Frequency) |
| RF Protocol | ISO 11784 / ISO 11785 - FDX-B & HDX |
| Memory | 512-bit EEPROM |
| Read/Write Life | > 100,000 cycles |
| Reading Distance | 3–10 cm (varies by reader and orientation) |
| Data Retention | > 10 years |
| Operating Temperature | –25 °C to +75 °C |
| Storage Temperature | –30 °C to +80 °C |
| Working Mode | Passive (no battery required) |
| Customization | Laser-engraved numbering, QR code, barcode, logo, encoding, color options |
| Applicable Animals | Sheep, goats, lambs, and other small ruminants |
Advantages of This EM4305 Livestock Identification Tag
Four reasons livestock integrators, government agencies, and OEM distributors choose SynTek for their sheep tagging programs.
Vertically Integrated TPU Tag Manufacturing
SynTek operates its own injection-molding line alongside automated coil-winding, chip-bonding, and frequency-tuning stations. This end-to-end control over the production process eliminates middlemen and delivers factory-direct pricing that trading companies cannot offer. For bulk orders of electronic sheep identification tags, this translates to significant cost savings versus comparable suppliers.
Reprogrammable Chip with Dual-Protocol Encoding
Most low-cost RFID ear tags use one-time-programmable transponders locked to a single encoding at the factory. The EM4305 inside this product supports on-site reprogramming and FDX-B to HDX protocol switching. This programmable animal tracking solution is ideal for multi-stage supply chains where data must be updated at feedlots, auctions, or cross-border checkpoints without replacing the physical device.
Sheep-Specific Design with Ultra-Low Drop Rate
The geometry, pin angle, and female-button venting pattern are tuned specifically for the thinner, more vascularized ears of sheep - not borrowed from a generic cattle template. Air channels molded into the female piece promote post-application healing, while the low-profile flag reduces snagging on wire fences and feed troughs. Field trials across Mongolian rangeland and West African pastoral herds confirmed a long-term retention rate above 99 %, making this electronic ear tag a dependable choice for wholesale buyers and national tagging programs alike.
Custom OEM Branding & Compliant Numbering
SynTek provides full OEM and ODM customization for ear tag distributors: laser-etched sequential numbering, ranch logos, QR-code or barcode printing, country-code encoding, and a choice of 12+ body colors. Tags can be pre-encoded with ISO 11784-format identifiers to meet national sheep registration mandates, making this a compliance-ready custom RFID solution for B2B animal tag importers worldwide.
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Application Scenarios for 134.2 kHz Sheep RFID Tags
From smallholder cooperatives to national traceability mandates, this TPU ear tag adapts to the full spectrum of flock management scenarios.
National Flock Registration & Traceability
Governments requiring ISO 11784-compliant electronic identification for sheep and goats - such as those following EU Regulation 21/2004 or Australia's NLIS - rely on 134.2 kHz RFID devices as the mandated traceability medium. This chip's writable memory accommodates country code, holding number, and individual animal ID in a single transponder, streamlining birth-to-slaughter record-keeping.
Breeding Program & Genetic Record Management
Breeding cooperatives and genetics companies need to pair individual sire/dam lineage data with each tagged animal. Because the chip supports field-writable data blocks, breeding technicians can encode parentage codes or genotype markers directly onto the tag - eliminating paper trail errors at lambing sheds and AI stations. This makes it a versatile electronic ear tag for livestock breeding programs.
Veterinary Health & Vaccination Tracking
Scanning a flock through a race-mounted reader at dosing or drenching time lets veterinarians log treatment dates against each ID automatically. This integration helps farms meet withdrawal-period regulations before slaughter and provides audit-ready vaccination records for export certification - essential for operations supplying certified lamb to international markets.
Government Livestock Traceability Program - Botswana
A government-backed livestock traceability initiative across communal grazing areas in Botswana required affordable yet reliable electronic identification for sheep and goats. Budget constraints ruled out premium European-made tags, while previous low-cost alternatives from trading companies showed unacceptable failure rates within the first wet season.
SynTek supplied pre-encoded EM4305 tags paired with handheld 134.2 kHz stick readers. The UV-stabilized TPU withstood daily temperatures exceeding 40 °C, and the sealed chip encapsulation prevented moisture ingress during the rainy season. The program confirmed consistent performance across the deployment period, with full integration into the national livestock database.
Specialist Animal Tag Manufacturer Since 2006
JingZhou SynTek Smart Technology Co., Ltd has been producing RFID animal identification devices for nearly two decades. Our in-house TPU molding facility, automated coil-winding line, and encoding stations enable a monthly output of 500,000–600,000 tag sets - making SynTek one of the fastest-turnaround electronic livestock tag factories worldwide.
We have executed large-scale sheep and cattle tagging projects in Mongolia, Senegal, Mauritania, and Botswana. With a confirmed drop rate below 1 %, our products compete head-to-head with premium European brands at a fraction of the cost.
Our Certificates
CE
ISO9001
Buyer FAQ - EM4305 Sheep Ear Tag
Q: What is the typical read range of this 134.2 kHz livestock identification tag?
A: With a standard handheld ISO-compliant stick reader, you can expect a reliable scan distance of 3–10 cm. The exact range depends on the reader's antenna power, orientation, and environmental interference. In practical shearing-shed or race-gate scenarios, operators consistently achieve first-pass reads within 5 cm without needing to part the fleece.
Q: Can this product be used for both sheep and goats?
A: Yes. The dimensions and pin length are designed for small-ruminant ears in general. It works equally well for goats, lambs, and other small livestock. The same two-piece applicator fits both species, so mixed sheep-and-goat operations need only stock a single SKU.
Q: How does the EM4305 differ from standard FDX-B–only transponders?
A: Standard FDX-B transponders are factory-programmed once and locked permanently. The EM4305 is a rewritable 512-bit EEPROM chip that supports both FDX-B and HDX protocols. You can reprogram the animal's ID number, update ownership codes, or switch modulation mode in the field using a compatible encoder - a critical advantage for livestock markets, cross-border transfers, and multi-owner supply chains. This flexibility is what sets a read-write RFID ear tag apart from commodity alternatives.
Q: Does this electronic identification tag meet EU traceability standards?
A: The product complies with ISO 11784/11785 at 134.2 kHz, which is the global standard referenced by EU Council Regulation (EC) No 21/2004 for ovine and caprine identification. SynTek can pre-encode tags with country-code and individual-number formats required by national schemes. For official approval in a specific country program, buyers should confirm with their local competent authority.
Q: Should I choose TPU or rigid plastic material for animal identification tags?
A: If you are working within a tight budget, rigid plastic (polyamide) costs less upfront but may crack in extreme cold, become brittle under UV exposure, and require more frequent replacement. Thermoplastic Polyurethane is softer, more elastic, and far more resistant to weathering - delivering a longer service life and lower total cost of ownership. For permanent livestock identification programs, TPU is the recommended choice.
Q: What customization options are available for OEM buyers?
A: SynTek offers laser-engraved sequential numbering, custom logo printing, QR codes, barcodes, country-code encoding, and 12+ body color options. We also provide a free sample service so you can evaluate quality before committing to production volumes. Contact us via WhatsApp (+86 133 1650 2378) or email with your project volume and specifications, and we will provide a tailored quotation within 24 hours.
Q: What is the difference between the EM4305 and Hitag S256 chip options?
A: Both chips operate at 134.2 kHz and support ISO 11784/11785. The EM4305 offers 512-bit EEPROM with open read/write access and is widely supported by third-party readers, making it the more cost-effective choice for large-scale flock identification. The Hitag S256 provides enhanced cryptographic security features suitable for applications demanding tamper-proof authentication, but at a higher per-unit cost. SynTek manufactures ear tags with both chipsets - contact us to discuss which option fits your requirements.
Q: Are these tags compatible with all universal RFID readers?
A: Yes. Any ISO 11784/11785-compliant reader operating at 134.2 kHz - including popular brands like Allflex, Agrident, Gallagher, and Datamars - will read this product. SynTek also offers its own handheld and panel-mount readers if you need a complete system. You can browse our full range of animal RFID readers for compatible options.
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