Chronos announces partnership with SEQ|TOR to distribute the J-ALERT Jamming Detector product in the UK
Instant notification of GPS and GSM signal jamming by unlawful devices
Counter Terror Expo, 25 April 2012 Stand G116 - Chronos Technology of Gloucestershire, UK has announced a new partnership with Danish company SEQ|TOR to distribute its J-ALERT GSM and GPS jamming detector product in the UK.
The J-ALERT is an RF signal analyser that monitors cellular radio frequencies and GPS to determine if the target is actively jamming these signals. When the J-ALERT detects jamming in the cellular bands a corresponding LED will light to indicate the Received Signal Strength (RSS) of the jammer and which band is being jammed. When GPS L1 frequency and a cellular band is being jammed, a bar graph indication of jammer RSS from the jammer is displayed enabling tracking. If both a cellular band and GPS L1 are being jammed simultaneously or if a cellular band is being jammed, a beep will sound every 3 seconds to alert the operator that a jammer is in use. The J-ALERT also has a stereo jack on the back of the unit with contacts for triggering an external device such as a camera for taking pictures of license plates.
The J-ALERT equipment enhances Chronos’ overall product offering in the GPS jamming market augmenting the existing handheld CTL3500 GPS jamming detector and the supporting research work being undertaken in the SENTINEL project which is developing a 24/7 GPS jamming detection and location capabilities.
Chronos’ Divisional Manager, GNSS Applications and Solutions, Andy Proctor, commented “SEQ|TOR’s J-ALERT product complements our existing portfolio of products for our customer base in the GPS jamming sector, including law enforcement agencies and critical infrastructure organisations. We look forward to a successful association with SEQ|TOR.”
Peter Kristiansen, President and Chief Executive Officer with SEQ|TOR said “Jammers are being used by criminals in increasing and alarming high number to defeat and cheat not only commercial on-board navigation and recovery systems but also Law Enforcement tracking systems. Chronos are acknowledged experts in the field of GPS jamming detection and we are pleased to be working with them.”
About Chronos Technology
Chronos is a UK specialist technology company in the field of position, navigation and timing; and interference detection and location. Chronos supply GNSS (GPS) products from receivers for all application types including covert tracking, avionics, and embedded systems to test equipment (simulators) and GNSS infrastructure (antennas, splitters, repeaters) for the distribution of GNSS RF signals into sensitive environments, including military systems. Chronos has developed a range of bespoke GPS timing products for time and frequency synchronisation in power and communication systems and is leading the Technology Strategy Board part-funded SENTINEL programme. Established in 1986, Chronos is also the UK leader in time and timing for fixed and mobile telecoms.

Chronos announces partnership with SEQ/TOR to distribute the J-ALERT GPS jamming detector product in the UK