The QTI magnetic sensor, originally designed by Sandia National Labs, utilizes a fluxgate magnetometer. QTI magnetic sensors have been deployed around the world for decades. They can detect disruptions in a local magnetic field caused by the presence of metal as well as other forces. Magnetic sensors can be included in remote sensor systems to help reduce nuisance alarms and aid in classification of events.
The QTI seismic sensor uses geophone technology to detect ground movement. The QTI seismic sensor can have a very large range of detection depending on local conditions. A walking human detection range is 10-30 meters while vehicle detection can be as high as 300 meters for large vehicles.
Passive Infrared Sensor
The QTI passive infrared sensor (PIR) was designed by Sandia National Labs. It detects heat differentials and is useful at ranges of up to 300 yards depending on the size of the target. The PIR will detect human, animal, and machine and is usually paired with QTI magnetic and seismic detectors.
Break Beam Sensor
The QTI break beam sensor uses an emitter and detector to create an invisible “beam” in a line between the two pieces of equipment. The break beam is triggered when the beam is broken. Recommended distance between the emitter and detector is 30 meters.
Break Wire Sensor
The Qual-Tron, Inc Break Wire sensor is a useful tool for some specific circumstances. True to its name, the break wire will send an alarm when the contact that runs through the “trip wire” is broken. The wire can be used as much more than a tripwire. The break wire can be used to determine if a gate has been opened or can be attached to a fixed object to determine if the object has been moved (shovel, fencepost, a signaling device). Actual uses of the break wire include placement in the ground to determine digging, and placement around a water valve to thwart theft. Be advised that the break wire needs to be physically reset after being triggered.