SCRAM, PAM, and the Interlock: Which Device, and When
Three different devices come up in Florida DUI cases, and they are not interchangeable. A SCRAM bracelet, a form of continuous alcohol monitoring, is worn at the ankle and checks for alcohol through the skin around the clock. A portable alcohol monitor, or PAM, is a handheld unit you breathe into on a set schedule, often with a photo or location stamp. An ignition interlock is wired into a car and tests your breath before the engine will start. Which one applies depends on the setting and on whether you even have a vehicle, because a person who does not own a car cannot do an interlock, so in a diversion or probation deal the choice often comes down to a SCRAM or a PAM. Sorting out which device fits, and pushing for the least burdensome one, is part of the work.
When Monitoring Shows Up, and How Pinellas Handles It
Monitoring tends to appear in three settings: as a condition of pretrial release while a case is pending, as a condition of probation or a sentencing alternative authorized under section 316.1937, and as something a person offers up to show a judge they are serious about staying sober. In Pinellas County in particular, a continuous alcohol monitor is commonly ordered at the advisory hearing as a condition of bond, fitted through the Sheriff’s Office before release, and whether it is imposed often tracks the facts of the case. A prior DUI, an accident or notably bad driving, a refusal or a high reading, or a minor in the car all make a monitor more likely.
| Setting | Why it is used | The risk |
|---|---|---|
| Pretrial release | Assurance of sobriety while the case is pending | A flagged reading can trigger a move to revoke bond |
| Probation or sentence | A condition, or an alternative to more jail | A flagged reading can become a violation of probation |
| Offered voluntarily | To show sobriety and support a better outcome | The cost, and exposure to a false positive |
How It Works, and Where It Goes Wrong
Alcohol leaves the body partly through the skin, and a transdermal device samples at the ankle on a schedule and reports a reading. Alcohol in the body follows a fairly predictable curve, rising to a peak and then falling back toward zero, and the monitoring company’s analysts use the shape of that curve to try to tell a real drinking event apart from an environmental source of alcohol. Here is the catch, and it comes straight out of the science: while many interferents do not look like a true alcohol curve, sometimes they do, depending on the type of substance, how much of it reaches the skin, and how much the skin absorbs. A reading the company flags is therefore a question to be answered, not an answer in itself.
The False-Positive Problem
Everyday sources of alcohol can reach the device and produce a reading that looks like drinking when no one drank. Hand sanitizer, lotions, perfumes and colognes, cleaning products, and some work environments all put alcohol near the skin, and the transdermal lag between a real drink and a reading adds another layer of confusion. The defense work is to read the curve the way the lab should: the absorption and elimination shape, the timing, the amount, and whether an interferent or a contamination, rather than a drink, explains what the company flagged. Separately, a tamper alert is its own dispute, since a loose strap or ordinary daily activity can set one off without any attempt to defeat the device.
Getting a Monitor Removed or Switched
A monitor ordered at bond is a condition, and conditions can be modified. I file a motion to modify the conditions of pretrial release to remove the monitor or step it down to something less restrictive, and in Pinellas these motions are often granted, especially once a person has worn the device for a stretch with no alcohol and no alerts. The legal spine is a due process point: a pretrial-release condition that is excessive in relation to its nonpunitive purpose can cross the line. See State v. Torres, 890 So. 2d 292 (Fla. 2d DCA 2004), citing Bell v. Wolfish, 441 U.S. 520 (1979). The practical levers add up: a clean compliance record, the cost, which often runs about ten dollars a day and roughly three hundred dollars a month and over the life of a case can climb past the maximum fine for the DUI itself, a medical need the device blocks, such as an MRI, and genuine hardship at work. The ask is usually to remove the monitor outright or, failing that, to switch to a portable alcohol monitor or periodic urine testing.
How I Use Monitoring in a Case
Monitoring cuts several ways, and I treat it that way. When a company flags a drinking event, I go at the data before it becomes a bond revocation or a violation of probation, testing whether the curve and the timing show consumption or an interferent. When a monitor is imposed as a bond condition, I move to modify or remove it on the grounds above. And when it helps, proposing monitoring can be the thing that keeps a client out of a jail cell and supports a better resolution than the alternative on the table. The device is a tool, and like any tool in a DUI case, it is only as good as the analysis and the advocacy behind it. For the broader forensic challenges that run through any alcohol case, see the expert witnesses page.
Related: DUI penalties overview, Diversion and reduction, Violation of probation, and License suspension and interlock.
I am one of six ACS-CHAL Forensic Lawyer-Scientists in Florida, and I read alcohol data the way the lab does, including the transdermal data a monitoring company generates. When a monitor is ordered as a bond condition, I also move to modify or remove it, and in Pinellas those motions are often granted. More on the forensic lawyer-scientist credential.
Common Questions
What is the difference between SCRAM, a PAM, and an interlock?
A SCRAM bracelet is continuous alcohol monitoring worn at the ankle that checks for alcohol through the skin around the clock. A PAM, or portable alcohol monitor, is a handheld unit you breathe into on a schedule. An ignition interlock is wired into a car and tests your breath before it will start. They serve similar goals through very different burdens.
I do not have a car. Do I still have to use an interlock?
No. An interlock only works if you have a vehicle to install it in, so without a car it does not fit. In a diversion or probation deal, the choice in that situation often comes down to a continuous alcohol monitor or a portable alcohol monitor, and which one applies is something that can be negotiated.
Can I get a continuous alcohol monitor removed?
Often, yes. A monitor ordered at bond is a condition that can be modified, and a motion to modify the conditions of pretrial release can remove it or switch it to something less restrictive, like a portable monitor or periodic urine testing. These motions are frequently granted in Pinellas, especially after a clean stretch of compliance, and the argument draws on the principle that a release condition excessive in relation to its purpose can violate due process, along with the cost, which over time can exceed the maximum fine for the DUI.
Can a SCRAM device give a false positive?
Yes. Everyday sources of alcohol, like hand sanitizer, lotions, perfumes, and cleaning products, can reach the device, and the analysis that separates a real drinking curve from an interferent is not foolproof, since interferents sometimes mimic the curve. A flagged reading is a question to analyze, not automatic proof of drinking.
Who pays for the monitoring?
The person wearing the device generally pays for it, often around ten dollars a day, which works out to roughly three hundred dollars a month. Over the months a case can take, that cost is significant, and it is one of the grounds for asking a court to remove or reduce the condition.
What happens if the device reports a drinking event?
A flagged event can prompt a move to revoke bond or a violation of probation, depending on the setting. It does not have to end there, because the curve, the timing, and the possibility of an interferent or a contamination can all be analyzed and challenged before a flagged reading turns into a consequence.
This page is general information about Florida law, not legal advice, and it does not create an attorney-client relationship. Whether monitoring is ordered, whether it can be removed, and what a flagged reading means all turn on the facts and the data, and the law can change, so confirm how it applies with counsel. Every case is different, and past results do not guarantee a similar outcome.
