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Continuous Alcohol Monitoring (CAM)

Our designed software uses industry leading mapping technologies, combined with true triangular GPS tracking, allowing remote supervision in real time.

This provides agencies detailed information about a client’s movement and travel history within the community. Our software offers customizable user settings for agencies and officers have the ability to control alerts and access to mapping to create inclusion and exclusion zones and set client schedules, with all imputed data being stored in Ohio Interlock’s central servers.

In the past, courts and other agencies have had limited choices for alcohol monitoring equipment. Our device offers reliable alcohol monitoring as well as triangular GPS tracking abilities, reporting any detected violations immediately to the supervising agency or officer.

One-Piece GPS Offender Tracking Device 4 (TD4)


A self-contained GPS tracking device designed to continuously monitor the offender’s location at varying levels of intensity. The One-Piece Tracking Device 4 (TD4) offers robust integration of location tracking, communication technologies and anti-tamper mechanisms to provide a reliable tracking solution. CAM is an ankle-worn device which uses transdermal technology to sense alcohol thru the skin. In the event that potential alcohol consumption has occurred, the module on the back of the device will analyze the participant’s moisture and vapor excreted from the skin. If the participant exceeds the 0.020 TAC thresholds, it is considered a violation.


CAM uses an algorithm that is able to be customized and sets a baseline for each individual, enhancing testing accuracy. CAM testing results that are generated are court validated and can be used as a single source of admissibility in court and revocation hearings, there is no need for secondary testing. There are also several tamper detection technologies such as a skin contact sensor to ensure the device is still on the participant’s leg and also to ensure they are not blocking the sensors, preventing the device from alcohol detection.


Continuous Alcohol Monitoring Features

Alcohol & Marijuana Sensing

The new redesigned Generation III alcohol and marijuana sensing house arrest ankle bracelet is worn around the ankle and is fitted close to the surface of the skin and has multiple features to provide complete monitoring of offenders. If alcohol is consumed, it is metabolized and diffuses throughout the body. This alcohol is present in various bodily substances such as breath, blood, urine and perspiration. Some percentage of consumed alcohol is metabolized through the skin. The primary sensor measures the specific characteristics that are chemically emitted transdermally from the body and measured against a pre-test baseline trip level for each offender. Additional sensors are used to detect tamper events and battery voltage levels. Any attempt to remove the bracelet will cause sudden changes to be detected in the sensors which will send an alarm notification. ​The bracelet casing is made from a high-grade ABS plastic and the straps are made of Santoprene (a high-grade plastic/rubber compound). It weighs approximately 6.5 ounces. Power is supplied by an internal rechargeable battery system. The bracelet is light, compact and can be worn without much discomfort.

Removal Detection

Any attempt to remove the bracelet will cause sudden changes to be detected in the proximity sensors which will send an alarm notice. At 6.5 oz, the bracelet is light and compact and able to be worn without discomfort.

Monitoring Software

The monitoring software is a web based user interface. No software packages are installed directly on the service provider’s computers. Offender information, baseline sensor data and GPS settings are easily controlled. Violation alert notifications are sent via SMS text and/or email. Intuitive screen design and function provides easy monitoring.

Cellular Network

A cellular wireless network is used so the alcohol and marijuana house arrest bracelet is not hindered by the drawbacks of landline telephones (some offenders do not have landline telephone service anymore due to the prolific use of cellular telephones).


Create your offender reports by simply using the computer Print function. The report are automatically formatted for 8½x11 paper – no copy and paste methods. Reports are customized by selecting the specific data and date/time range. Offender monitoring data is stored for 3 years as a standard retention policy in our world class data center.

Geo-Fence and GPS

A judge, when setting the conditions of probation/house arrest, may stipulate that an offender not use alcohol or marijuana and that the same offender must stay out of certain geographic areas. In matters involving domestic violence offenders or sex offenders, the active GPS technology offers the option to create a “Geo-Fence” whereby a specific location or geographical area may be identified as a restricted area to the offender. The GPS tracking feature archives and stores the location tracking information in a date/time fashion. This feature provides a chronological listing of the offender’s whereabouts and shows when the offender arrived and left a particular location such as home, work, or school.

Client Alerts

A unique automated voice audio message and signal tone will remind the offender that the batteries in the ankle bracelet and/or the GPS tracking device are due to be recharged.

Smart Phone Compatible

The TT Tracking user interface is configured for alternative viewing on your smart phone or tablet. With real time tracking of monitored offenders the service provider or officer can track down individuals who are moving.

  • Detects the presence of marijuana

  • Detects the presence of alcohol

  • Active GPS tracking

  • Tamper/removal sensors

  • Medical grade casing/strap materials

  • Weighs 6.5 oz.

  • Real time geographic surveillance

  • Water resistant and shock resistant

  • Auto-reminders for battery recharging

  • User interface software packages

  • “Geo-Fencing” capability

advanced communication
This new redesigned Generation III alcohol and marijuana sensing house arrest bracelet is now available. It is a powerful tool for courts and probation departments as an alternative mode of sentencing due to overcrowded jails. Probation departments spend most of their time handling offenders on drug and alcohol-related matters. We now have the technology to monitor alcohol and marijuana usage in offenders and to provide probation departments with on-line information for each monitored offender. It is no longer necessary for probation officers to require offenders to come in for random drug and alcohol testing. If alcohol or marijuana usage is detected by the equipment, the offender can be summoned and ordered to come in for additional testing.

Dedicated Support with a
Staffed Monitoring Department

dedicated support
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