Four systems, one platform
Hardware, sensing, connectivity and security aren't separate products bolted together. Every signal runs through one platform built to work as a whole.
- Precision GPSMulti-satellite positioning with exclusion zones accurate to within a few meters, refreshed continuously.
- Verified breath testingA handheld breath tester confirms who took each test with facial recognition, a photo and the GPS location.
- Always-on connectivityDual-network cellular keeps every device reporting in, even where coverage is thin.
- Encrypted by defaultEvery signal is encrypted in transit and at rest, with role-based access for officers and partners.
Guardian GPS ankle monitor
exploded view
How it works
From device to decision, in seconds
11:42 PM. The device has been quiet all evening.
The strap is cut
Strap-cut, stretch and housing sensors trigger an immediate alert to the monitoring center, along with the device's last known location.
The device reports
It keeps logging location as it moves. Fixes come every 30 seconds, and can be set as often as every 10 seconds during an active alert, accurate to 3 to 5 meters outdoors.
The platform analyzes
Our system checks the event against the participant's rules and flags it, and a live specialist in our 24/7 monitoring center reviews it.
The officer is alerted
The specialist routes the alert to the right officer, in under 60 seconds on average.
Illustrative timeline. Published targets: a GPS fix every 30 seconds (as often as every 10 seconds during an active alert) and an under-60-second average alert response.
Officer Dashboard
A live dashboard for courts and agencies: tracking map, exclusion zones, alert history and compliance reports, all in one place. This is the same screen your specialists and officers work from.
Court-ready reports
Clean, timestamped readings that hold up for probation reviews and court hearings, generated on demand.
Live tracking map
Every participant's current fix, zones and check-ins on one map, with alerts routed to the assigned officer.
Role-based access
Officers, courts and partners see only the caseloads they are responsible for, and every access is logged.
Exports that fit your system
Compliance reports export cleanly, and the platform can be configured to share data with the systems you already use.
Built for reliability, not just uptime
- 99.9%
- Device uptime
- <60 sec
- Average alert response
- 5 days
- Ankle monitor battery life
- 30 min
- Alcohol test interval
Redundant power
Battery and generator backup keep the monitoring center running straight through outages.
Dual-network failover
Every device switches carriers automatically the moment one network drops, with no gap in reporting.
Geo-redundant data
Platform data is mirrored across multiple facilities, so monitoring never depends on one system.
24/7 staffed monitoring
Three shifts, every day of the year, watching every device. See inside the monitoring center.
Built to standards courts can trust
Guardian GPS data is encrypted end to end, access is logged and role-restricted, and our platform is built around the reporting requirements courts and agencies already use.
Compliance Info- End-to-end encryptionData encrypted in transit and at rest
- Role-based accessOfficers and partners see only what they need
- Audit loggingEvery access and alert is recorded
- Redundant infrastructureMonitoring never depends on one system
Four devices, one dashboard
Every device reports into the same Officer Dashboard and the same 24/7 monitoring center. Choose the form factor the program calls for.
GPS Ankle Monitor
- Worn
- Ankle, rugged
- Battery
- 5 days
- Reports
- Real-time GPS
- Rated
- IP68
GPS Watch
- Worn
- Wrist, discreet
- Battery
- 5 days standby
- Reports
- Real-time GPS
- Rated
- IP68
Alcohol Detection
- Form
- Handheld
- Battery
- 5 days standby
- Tests
- Scheduled or random
- Verified
- Face, photo, GPS
House Arrest App
- Runs on
- iOS & Android
- Battery
- Phone's battery
- Reports
- Scheduled & random check-ins
- Verified
- Photo + GPS
Every spec, side by side.
Compare specificationsDevice specifications, side by side
| Spec | GPS Ankle Monitor | GPS Watch | Alcohol Detection | House Arrest App |
|---|---|---|---|---|
| Battery life | 5 days | 5 days standby (hourly tracking) | 5 days standby | Uses phone's battery |
| Connectivity | Dual-network cellular + GPS | 2G/3G/4G + GPS/BeiDou/Wi-Fi/LBS | — | Wi-Fi & cellular (phone) |
| Water resistance | IP68: showers, rain, brief swims | IP68 | — | N/A (software) |
| Reporting interval | Real-time | Real-time | Scheduled or random tests | Scheduled & random check-ins |
| Tamper detection | Strap-cut & light sensors | Conductive strap circuit | Facial recognition + photo on every test | N/A |
| Form factor | Ankle-worn, rugged | Wrist-worn, discreet | Handheld, fits in a pocket | iOS & Android app |
Technical questions, answered
Location & Sensors
Devices use multi-satellite positioning accurate to within a few meters in most conditions, refreshed continuously, so an exclusion-zone violation is caught the moment it happens, not minutes later.
Tests are prompted on a schedule or at random. Each breath sample takes under 15 seconds, and every test is verified with facial recognition, a photo and the GPS location.
Strap-cut, stretch, and housing-breach sensors trigger an immediate alert to the monitoring center the moment tampering is detected, along with the device's last known location.
Connectivity & Reliability
Location and event data are stored on the device and sync automatically once connectivity returns. Anything that needs review is escalated to the monitoring center as soon as the device reconnects.
Devices alert the participant and the monitoring center well before the battery is depleted, giving enough time to charge without missing reporting windows.
The monitoring center runs on redundant power and network paths, and platform data is mirrored across multiple facilities, so monitoring doesn't depend on any single system staying up.
Data, Security & Integrations
All data is encrypted in transit and at rest, access is role-based and fully logged, and the platform is built around the reporting standards courts and agencies already use. See our Security & Compliance section for details.
No. Data is shared only with the assigned officer, court, or agency responsible for a participant's program, never sold or shared with outside parties.
The Officer Dashboard supports exportable compliance reports and can be configured to share data with the systems your court or agency already uses. Talk to our team about your specific setup.