The CAM program alcohol monitoring system is a court-ordered form of supervision in which you wear an ankle bracelet that continuously tests for alcohol through your skin. Judges use continuous alcohol monitoring as a condition of pretrial release, probation, or sentencing, most often in DUI cases, so a defendant can stay out of custody while the court enforces a no-drinking order. The bracelet runs 24 hours a day, builds a detailed record of every test, and reports violations to the supervising agency.
One quick boundary: the acronym CAM also refers to the Central American Minors program run by U.S. Citizenship and Immigration Services, which handles refugee resettlement for certain children from El Salvador, Guatemala, and Honduras.1U.S. Citizenship and Immigration Services. Central American Minors (CAM) Program That is a different program entirely. Everything below is about the criminal-justice alcohol bracelet.
How the Bracelet Detects Alcohol
The device straps to your ankle and uses an electrochemical fuel cell to detect ethanol vapor coming through your skin. Your body constantly releases trace sweat, and if you’ve been drinking, some of that alcohol evaporates at the skin’s surface. An internal pump pulls a vapor sample every 30 minutes, and the fuel cell produces a measurable reaction when ethanol is present.2SCRAM Systems. SCRAM CAM Bracelet Alcohol Ankle Monitor The result is a near-continuous alcohol reading, every day of the week.
The device can detect concentrations as low as .020%. It also includes temperature sensors and an electronic tamper-detection strap connecting the two halves of the bracelet. Cutting the strap, trying to remove it, or wedging something between the sensor and your skin logs a tamper alarm that transmits to the monitoring center.3FCC. SCRAM System User Manual Readings transdermally lag what a breathalyzer would show in the moment, but ultimately correlate with breath-test results.
Who Courts Order to Wear It
Repeat DUI offenders are the most common population on CAM, but first-time offenders with high blood alcohol levels or aggravating circumstances also end up on it. Beyond DUI, judges use continuous alcohol monitoring in domestic violence matters where alcohol played a role, in child custody disputes involving substance abuse allegations, and in any case where a no-drinking order is central to pretrial release.
How long you wear it depends on the judge and the seriousness of the case. Research has found average wear times of roughly 70 to 90 days, but six months is common for repeat offenders, and some orders run a year or more when the goal is long-term sobriety. The length is set in your court order or probation agreement, and the bracelet does not come off until the court or supervising authority authorizes it.
What You’ll Pay
In nearly every case, the person wearing the bracelet pays for the program. Installation runs roughly $50 to $170 one time, depending on the provider. Daily monitoring then runs about $10 to $15, or roughly $300 to $450 per month. Some providers use income-based sliding scales. On top of that, you can be billed for violation events, equipment damage, and service calls that require a technician visit, which can add $100 or more per incident.
Payments are usually due weekly or biweekly. Falling behind can trigger a non-compliance report, which creates the same kind of court exposure as a drinking violation. If you can’t afford the fees, raise it with your attorney before installation. SCRAM Systems, the dominant manufacturer, runs a client assistance program that lets participating agencies cover some or all fees for qualifying defendants,4SCRAM Systems. Client Assistance Program but availability depends entirely on whether your local agency participates.
Daily Rules That Keep You Compliant
Bathing and Water
Showers are the only approved way to bathe. No swimming pools, hot tubs, or baths. Submerging the bracelet gets flagged as a tamper attempt, and you’ll be financially responsible for any water damage to the hardware.5SCRAM Systems. SCRAM CAM Help Keeping the skin around the sensor clean actually helps the device work properly.
Base Station Downloads
Test results sit in the bracelet’s memory until they transfer to a base station in your home. You need to be within 30 feet of the base station at the scheduled download time for the transfer to go through.5SCRAM Systems. SCRAM CAM Help Missed downloads can look like you’re avoiding monitoring, so plan around those windows and tell your supervising agent early if your work schedule conflicts.
Travel
You can go to work, the gym, and most social events normally. Air travel is possible. Tell the security agent at the airport that you’re wearing an electronic monitoring device that cannot be removed; they will likely swab and test it. Any trip that keeps you away from your base station for an extended time needs advance coordination with your supervising agent, and out-of-state travel almost always requires prior court approval.
Medical Procedures
The bracelet is not compatible with MRI machines. The magnetic fields can damage the device and injure you. If you need an MRI, CT scan, or any procedure that requires removal, contact your supervising agent well before the appointment to arrange removal and reinstallation. In a genuine medical emergency, you are authorized to cut the strap yourself, but document everything afterward with photos, hospital records, or a doctor’s note. If you have a pacemaker or other implanted device, consult your healthcare provider before the bracelet is installed, because the electronics may not be compatible.6SCRAM Systems. Health and Safety Notice for SCRAM Systems Products
Battery Replacement
The battery is replaced by a program representative roughly every 60 days.3FCC. SCRAM System User Manual You’ll be contacted to schedule it. Don’t let the appointment slip. A dead battery means no data, and no data looks like obstruction.
Products and Places That Can Trigger False Readings
The sensor is sensitive enough that alcohol-containing products on your skin or in the air around you can produce readings that look like drinking. This is where most avoidable problems come from. Watch out for:
- Hand sanitizer, which contains at least 60% ethanol and absorbs through the skin.
- Perfumes, colognes, and body sprays, many of which are alcohol-based.
- Hairspray and shaving cream, which frequently contain propanol or ethanol.
- Household cleaners and paint, whose fumes can interfere with the sensor.
- Decaying fruit and some fermented foods, which release ethanol vapor.
- Menthol cigarettes and breath mints, whose compounds can affect readings.
Environment matters too. Bars, bakeries, hair salons, and workplaces where alcohol-based chemicals are regularly used can expose you to ambient ethanol vapor the sensor picks up. Read labels on anything you put on your body, and be aware of what’s in the air around you. The system is designed to screen out some environmental interference, but it doesn’t catch everything, and avoiding the trigger is easier than arguing your way out of a flagged reading.
If You Get a Violation Report
A confirmed drinking event or tamper alarm sets off a chain of consequences that scales with the severity of the incident, your history, and local practice. Agencies generally use progressive sanctions. A first, minor incident might bring tighter conditions or added reporting. Repeated violations or clear evidence of deliberate tampering typically send you back before a judge, where outcomes range from extended monitoring to bond revocation and incarceration.7SCRAM Systems. Frequently Asked Questions Some programs treat tamper violations more aggressively than drinking events because tampering implies deliberate defeat of monitoring. There is no single national standard. Your court order and local program rules control what happens, and per-violation fees of $100 or more often stack on top.
A flagged reading is not automatically proof you drank. If you receive a violation report, call your attorney immediately, before the court acts on it. The strongest defenses focus on the data itself. Genuine alcohol consumption produces a smooth, continuous curve on the transdermal alcohol concentration graph. A jagged, saw-toothed, or impossibly long pattern is more consistent with a device malfunction or environmental interference than actual drinking. Your attorney can also demand proof that your specific device was properly calibrated to establish a baseline when no alcohol was present. Without that calibration evidence, the data has a reliability problem.
Other defenses include corroborating evidence from ignition interlock devices, independent breathalyzer tests, or witnesses who contradict the alleged event. Expert witnesses who understand how the sensor works can be effective, especially where the reading could plausibly be explained by workplace chemical exposure or alcohol-containing personal care products. Water damage is another documented source of unreliable data, and the manufacturer has acknowledged that vulnerability in its own patent filings. Even where courts consider the technology generally reliable, your attorney can argue that it produced unreliable results in your specific case due to your skin properties, hydration, ambient temperature, or other individual factors. These reports are evidence, not verdicts, and judges do reject them when the defense raises credible doubt.