| The original main ADD|
The new main ADD
A handheld ADD
|Object type||Radio wave-monitoring computer|
|Owner||Anomaly Research Centre|
|Appearances||Episode 2.3 onwards|
The Anomaly Detection Device, or ADD for short, is a computer designed by Connor Temple to detect Anomalies in the United Kingdom and later the whole Earth. There is the big, main ADD located at the ARC, and handheld ADDs for locating Anomalies in the field.
The main ADD resides in the ARC and constantly watches over the whole of the UK (and later the entire globe), and finds new Anomalies via the radio interference they cause on the 87.6 FM frequency. When the ADD detects an Anomaly, it will emit and alarm and locate the Anomaly's coordinates. However, the ADD apparently cannot pick up satellite Anomalies, (Episode 4.7) and when it detects a Spaghetti Junction, this will cause a surge. (The Lost Island)
The ARC team also use smaller, palm-held versions of the ADD in the field to locate Anomalies. The handheld versions are short-length radio receivers which detect Anomaly signals within a range of about 100 metres (though they have detected Anomalies at greater distances than this (Episode 2.5, 3.8)
As well as picking up Anomalies, the ADD also acts as a computer containing the ARC staff's personal files, it picks up any radio signals sent to the ARC, and it can be used to trace phones through the phone network. (Episode 2.6)
After Nick Cutter and Connor Temple realised that the radio interference Anomalies produced could be used to track them, they made plans to build an Anomaly detector and convinced James Lester to give them the funding.ARC's main hub. After it was completed, Connor unveiled and activated the ADD, and explained how it worked. When a Smilodon appeared at Blue Sky Park, the team immediately began to doubt the ADD's reliability. At the park, Connor tried to use a handheld ADD to detect an Anomaly, but there was no Anomaly signal.
The ARC team later discovered that the ADD hadn't picked up any Anomaly at the park because the Anomaly that the Smilodon had come through had opened and closed years earlier. After the Smilodon incursion was dealt with, the ADD detected its first Anomaly, and Cutter and Connor went to deal with the incursion.
The ADD detected an Anomaly near the Thames in the Isle of Dogs, but the Anomaly closed before the ADD could trace its exact coordinates. A day later, Cutter, Connor and Stephen Hart's handheld ADDs went off when the Anomaly reopened, and Cutter and Connor used their ADDs to track the Anomaly through the warehouse where it was located.
The ADD detected an Anomaly in Hackney, but Oliver Leek then hacked the Detector and stole the Anomaly's coordinates from it. After Cutter and Jenny Lewis found the Anomaly at a worksite, Cutter used a handheld ADD to track the Anomaly to a drainage pipe.
After Cutter, Stephen and Taylor Craig were marooned in the Silurian when the Anomaly closed, Cutter's ADD went off when a new Anomaly opened up in the Silurian. The trio then used the handheld ADD to track the Anomaly through the Silurian on their journey to it. The ADD was dropped in a sandstorm, but still functioned, and the Cleaner later stole it from the trio, but they took it back when the Cleaner was killed.
The ADD detected a new Anomaly on the M25. After the incursion was dealt with, Cutter and Connor planted a computer virus in the ADD, and rigged it to send a false Anomaly reading to Leek's laptop. However, Leek realised that the Detector had been rigged, and also booby-trapped his personal file on the ADD so that if the file was successfully accessed, a bomb within the ARC would activate.
When Leek released a Neural Clamped Future Predator into the ARC, he communicated with Lester through the ADD until the Predator was killed by a Columbian Mammoth. Connor subsequently tried to access Leek's personal file, and unintentionally set off the bomb when he successfully entered (though Cutter was able to disable the bomb). Connor later used the ADD to trace and locate the soruce of the signal that Leek had been sending to the Future Predator's Neural Clamp. Connor also used the ADD to trace Caroline Steel's mobile phone to Leek's Creature Prison.
When Cutter predicted that an Anomaly would open at an Abandoned House, Connor, Abby and Jenny used handheld ADDs to search for an Anomaly signal within the house. Jenny's ADD later went off when the Anomaly at the house reopened.
After the main ADD was repaired from the damage caused by Helen's bomb, it detected an Anomaly at Christine Johnson's Headquarters when the HQ's cloaking device was temporarily disabled. It later detected another Anomaly at an airport. Meanwhile, Mick Harper stole Jenny Lewis' handheld ADD from her car, and he and Katherine Kavanagh used it to locate the airport Anomaly.
When Sid escaped into the ARC, he chewed through one of the ADD's cables, stopping it from detecting any Anomalies. After Connor repaired the Detector, it emitted an alert about an Anomaly that had opened and closed while the Detector was disabled.
The ARC team used Connor's handheld ADD to track an Anomaly at a Race Circuit to the race circuit's hangar. Later, Jack Maitland stole Abby Maitland's handheld ADD from her bag and used it to follow the Anomaly signal to the Race Circuit.
After the ARC was shut down and revived, a new, upgraded ADD operated by Jess Parker was apparently built in the new ARC to replace the old Detector. It went off when Connor opened an Anomaly in London.
The ADD detected an Anomaly at Witchfield Cove, but the signal kept flunctuating due to illegally dumped fuel at the Anomaly site weakening the Anomaly. Due to this, the ADD was initially unable to lock onto the Anomaly's exact coordinates, but Philip Burton was eventually able to use the ADD to locate the Anomaly.
When two Anomalies opened on the exact same spot at a prison, the ADD detected the Anomalies but registered them as one Anomaly. The ADD also failed to detect the satellite Anomalies that the merging of the two Anomalies was creating throughout the prison.
Abby used the ADD to spy on Connor via the ARC's security cameras.
The ADD detected the First Man-made Anomaly in Connor's lab the second time the Anomaly formed. Later, when the Anomaly released a gamma ray into the ARC, the ray disabled the ADD. The ADD was later repaired, and Connor discovered using it that Philip had attempted to activate the ARC's incineration process.
When the New Dawn Anomaly released a massive EM surge throughout London, it disabled the ADD.
- In Episode 2.3, Connor said that the ADD worked by tracking the radio interference that Anomalies give off when open. Therefore, the ADD would not function in time periods on the other sides of Anomalies when there are no radios, but the handheld ADDs have been shown numerous times to be able to detect and track Anomalies in time periods when there were no radios.
- The Anomalies give off bursts of radio interferences on both sides. Radios can pickup radio signals any where, as long as they have antennae, so the handheld ADDs, which have antennae, could therefore pickup Anomalies in the past.
- Some fans have speculated that this is because the handheld ADDs, unlike the main ADD, track Anomaly signals differently to the main ADD.
- In The New World (New World Episode 1.1), it was believed by fans that the device Evan Cross took from the unknown ARC member was a handheld ADD of some kind. This proved to be true.
- The Special Projects Group would make their own Anomaly Detector in Primeval: New World. It would work using both radio and magnetic interferences.