SCRAM Ankle Monitor: How It Works, Cost, and Rules (2026)

SCRAM CAM (Continuous Alcohol Monitoring) is worn on the ankle and cannot be taken off by the wearer. Every 30 minutes, around the clock, it takes a sample of the air and perspiration directly above your skin and measures it for transdermal alcohol — ethanol that your body sheds through the skin after you drink. It uses the same electrochemical fuel-cell technology found in law-enforcement breathalyzers, so it is measuring alcohol directly, not guessing.

The science: when you drink, most alcohol leaves through your lungs and kidneys, but about 1% is excreted through the skin. That is what SCRAM detects. Because skin alcohol lags behind blood alcohol, a SCRAM reading rises and falls more slowly than a breath test would — and that predictable, gradual curve is exactly what analysts look for to confirm real drinking.

The bracelet stores each reading and transmits the data — usually once a day — to a wireless base station or modem in your home, which uploads it to SCRAM's monitoring center. There, trained analysts and validated software review the results. Only after that review does anything get reported to your probation officer, the court, or the monitoring agency. In practice this means a few days can pass between an event and any notice of a violation.

SCRAM CAM does not include GPS and does not track where you go. If a court wants both location and alcohol monitoring, it orders a separate GPS device or a different SCRAM product (covered below).

Ethanol is in a surprising number of everyday products, and any of them can register on the sensor if they reach the device: hand sanitizer, many lotions and body washes (brands like Dove, Aveeno, Eucerin, Vaseline, and Cetaphil have alcohol-containing formulas), hairspray, perfume and cologne, aftershave, some cleaning sprays, and fumes from gasoline or solvents. Because the bracelet only reads what reaches its sensor, lotion on your hands is harmless — but that same lotion rubbed on the leg wearing the monitor can cause a reading.

Here is the key point most people don't know: an environmental reading and a drinking reading look different, and the system is built to tell them apart. Alcohol applied to the skin from a product spikes almost instantly and then evaporates and 'burns off' far faster than your body could ever absorb and metabolize a drink. Real consumption produces a slower rise and a gradual decline. SCRAM's confirmation process combines this curve analysis with human review by trained analysts, and the manufacturer states that recommended, ordinary use of alcohol-containing hygiene and cleaning products will not generate a confirmable alcohol alert.

Still, protect yourself. Avoid putting alcohol-based products on or near the monitored ankle, keep the device away from direct contact with cleaning chemicals and gasoline, and if you know you were exposed to something (you painted a room, refueled a car, used a lot of hand sanitizer), tell your monitoring officer proactively and note the date and time. A documented, plausible explanation is far more persuasive than a surprised denial after the fact.

The bracelet does more than test for alcohol — it constantly checks that it is still on your body and unobstructed. An infrared sensor confirms the device is against your skin, and a temperature sensor watches for the sudden changes that happen when a device is removed or when something is slid between the sensor and your leg. If you cut or stretch the strap, block the air intake, or insert any barrier, the device logs an obstruction or tamper event. Importantly, tamper and obstruction events are treated with the same seriousness as a confirmed drinking event, because the system assumes an obstruction may be an attempt to hide consumption.

Not every reading is a 'violation.' SCRAM sorts events into confirmed and unconfirmed. An unconfirmed reading is one the analysis could not verify as actual consumption — often environmental alcohol or a brief anomaly — and it generally is not reported as a violation on its own. A confirmed drinking event is one that passed the full curve analysis and human review. SCRAM's confirmation criteria are peer-reviewed and published, which is one reason courts accept the data.

Because of the review step, there is usually a delay. An event is recorded, uploaded to SCRAM, analyzed, and only then — if confirmed — reported to the supervising officer or court, who notifies you, and then your attorney. Do not assume that no immediate contact means you are in the clear, and do not assume every buzz or notification is a confirmed violation. Wait for the actual report before reacting.

Cost: SCRAM CAM typically runs $10 to $15 per day plus a one-time installation or hook-up fee of about $50 to $100 — roughly $300 to $450 per month. In most jurisdictions the wearer pays, either to the court or to a private monitoring vendor. If you genuinely cannot afford it, ask the court in writing for an indigency waiver, a sliding-scale rate, or a payment plan; under Bearden v. Georgia you cannot be jailed solely because you are too poor to pay. See our full ankle-monitor cost guide for how to request a fee reduction.

Court orders: a judge can order SCRAM for anywhere from about 30 days to more than a year. The length usually tracks the seriousness of the offense, the number of prior DUI or DWI convictions, and any signs of an underlying alcohol problem. SCRAM is common as a bond or bail condition, a term of probation or parole, a DUI sentencing option, and in family and custody cases where sobriety must be proven.

The rules while you wear it: total abstinence — any confirmed drinking is a violation. Keep alcohol-based products off the monitored ankle. You can shower and wash normally because the device is water-resistant, but do not submerge it — no baths, swimming pools, or hot tubs, since prolonged submersion can trigger an obstruction alert. Keep the device charged and stay within range of the base station so your data uploads on schedule; a device that goes dark looks like tampering. Never try to remove, loosen, or shim the bracelet. If it is uncomfortable, damaged, or reads oddly, report it to your monitoring officer — do not try to fix it yourself.

SCRAM makes several products that courts order for different purposes. SCRAM CAM is the classic ankle bracelet described on this page: passive, continuous alcohol monitoring only, no location tracking. SCRAM GPS is a separate ankle device that tracks location and geofence (exclusion-zone) compliance for higher-risk supervision — it monitors where you are, not whether you drank. SCRAM Remote Breath is a handheld device you carry, not an ankle bracelet: it prompts you to blow into it at scheduled, random, or on-demand times, and it typically records a GPS location with each test and each missed test. Some people are placed on both a GPS device for location and a CAM bracelet or breath schedule for alcohol.

Choosing between them is usually the court's call, but if you have input: CAM guarantees you can never 'miss' a test and requires no action from you, which suits people who want a clean, hands-off compliance record. Remote Breath is less visible and lets you move about more freely, but you must respond to every test prompt — a missed test is itself a violation.

Challenging a violation: a SCRAM report is evidence, not an automatic conviction. If you are accused of a confirmed drinking or tamper event, you and your attorney can request the underlying data, the timing and shape of the readings, and the maintenance and calibration records for your device. Innocent explanations that experts and courts take seriously include environmental alcohol exposure, a poorly fitted or shifting bracelet, and equipment error. SCRAM's data has faced Frye and Daubert reliability challenges, and both SCRAM analysts and independent forensic experts can testify at evidentiary hearings. The single most important move if you are notified of a violation is to talk to a lawyer before you admit anything or try to explain it on your own — an early, documented explanation backed by a defense expert is far stronger than an off-the-cuff denial.