Types of Electronic Monitoring Devices

by Kyla Chele Cambrooke ; Updated September 28, 2017

An electronic monitoring device keeps track of a person's activities. Typically, a court orders a person to wear an electronic monitoring device. Some devices attach to the wrist or ankle. The devices program a person's forbidden and allowed areas.

GPS Active Tracking Tether

An active tracking tether tracker monitors a person using satellites and reports information at set intervals. The system programs predetermined radiuses. If the person enters an excluded area, a pager notifies a GPS staff member.

GPS Passive Tracking Tether

A passive tracking tether tracks a person's activity and stores the information for download the next day. The tether programs areas the person can and cannot enter.

Breathalyzer Monitor

The Breathalyzer monitor reviews and tests a person at random while at home. The person has to take a preliminary breath test once the system contacts the home. The system typically has a camera.

Ignition Interlock

Ignition interlock is a machine installed in a vehicle to analyze a person's breath for alcohol. The engine does not start if the breath analyzer detects alcohol. The person has to blow in the machine and pass the test before the engine will begin.

Secure Continuous Remote Alcohol Monitoring (SCRAM)

The SCRAM device analyzes a person's skin to determine the blood alcohol content once an hour. The unit begins to test every 30 minutes if it detects alcohol.