Leading ankle monitor manufacturer serving corrections, pretrial, parole & probation agencies in 30+ countries. One-piece GPS ankle monitors with 7-day battery, fiber optic anti-tamper (zero false positives), and <3 second installation.
Next-generation GPS ankle monitors and electronic ankle bracelets. Ultra-high security and reliability powered by 20 years of innovation in electronic monitoring technology.
The lightest one-piece GPS ankle monitor at 108g. 7-day battery, fiber optic anti-tamper (zero false positives), multi-GNSS positioning under 2m accuracy.
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Two-piece GPS ankle bracelet and tracking unit for precision location monitoring. RF wristband pairs with portable tracker for continuous offender supervision.
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Advanced curfew monitoring with integrated cellular and Bluetooth, plus battery backup for continuous operation.
Learn Morebluetooth optical fiber wristband
The smallest professional electronic monitoring anti-tamper wristband in the world — only 17g, virtually indistinguishable from a fitness band.
BLE and RF ankle bracelet options with 2-year battery life. Fiber optic tamper detection for GPS ankle monitor pairing with i-Tracker or HouseStation.
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CJIS-READY MONITORING PLATFORM
A CJIS-ready, zero-trust platform with court-admissible evidence reports, 13 modules for GPS ankle monitor management, offender tracking, zone alerts, and compliance reporting. ECDSA-signed data chain from device to courtroom.
Learn MoreONE-STOP MONITORING SOLUTION
From high-risk GPS ankle monitors (CO-EYE ONE) to low-risk smartphone tracking (AMClient), our electronic monitoring product matrix covers every offender supervision need on a single unified platform.
200,000+ devices deployed across 30+ countries. 7-day battery. Zero false tamper alerts. Under 3-second installation.
Get started today200,000+
Devices Deployed
30+
Countries Served
20+
Years of Experience
CJIS
Security Policy Ready
REFINE Technology (CO-EYE) has been a professional ankle monitor company since 2004, providing GPS ankle monitors and electronic monitoring solutions to government agencies, corrections departments, and bail bond companies worldwide.
Expert resources to help you understand, evaluate, and deploy electronic ankle monitoring technology.
Complete guide to ankle monitors: how they work, types (GPS, RF, alcohol), who wears them, costs, rules, and the technology behind modern electronic monitoring devices.
Read the complete guide →Technology comparison, vendor landscape, 10 evaluation criteria, RFP writing guide, cost analysis, and deployment best practices for corrections and pretrial agencies.
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When a Louisiana court convicted an ankle monitoring company employee for negligent injury in August 2026, it marked the first time in the state’s history that someone responsible for tracking a GPS ankle bracelet was held criminally liable for failing to act on violation alerts. The case — rooted in the 2021 murder of 70-year-old […]
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When ICE fitted a GPS ankle monitor on 20-year-old Pierre Damas Bel in Springfield, Ohio, this July, the device was one of roughly 53,000 GPS trackers strapped to immigrants under the agency’s Alternatives to Detention program — a 76% increase over the previous fiscal year, according to federal data reviewed by WCPO. Meanwhile in Prince […]
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When DuPage County, Illinois signed a $678,000 electronic monitoring contract with Sentinel Offender Services in January 2026, the OmniLink OM500 was the hardware at the center of the deal. The same device sits on thousands of ankles across Georgia, Michigan, Florida, and Hawaii through NASPO ValuePoint cooperative procurement agreements. If you’re evaluating GPS ankle monitors […]
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