{"title":"Non-Linear Junction Detectors","description":"\u003ch4\u003eWhy these exist\u003c\/h4\u003e\n\u003cp\u003eEvery other detection method depends on the device doing something. A signal detector needs it to transmit. A lens detector needs line of sight to the optics. A device switched off inside a wall cavity, a piece of furniture or a power outlet defeats both.\u003c\/p\u003e\n\u003cp\u003eA non-linear junction detector transmits a signal and listens for the harmonics that semiconductor junctions produce when energised. Almost any circuit board responds, whether powered or not. That is why these are standard equipment for professional sweeps and why they cost substantially more than consumer detectors.\u003c\/p\u003e\n\u003ch4\u003eWho uses them\u003c\/h4\u003e\n\u003cp\u003eCorporate security teams before board meetings, legal and financial firms handling sensitive matters, and professionals conducting sweeps for clients. Carrying one is what separates a professional search from a consumer check, because it finds a device whether or not it is powered. If you are checking your own home or car occasionally, a combined\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"\/collections\/listening-device-detectors\"\u003esignal detector\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"\/collections\/spy-camera-detectors\"\u003elens detector\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eis the appropriate tool.\u003c\/p\u003e\n\u003ch4\u003eCommon questions\u003c\/h4\u003e\n\u003cp\u003e\u003cb\u003eDoes it need the device to be on?\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eNo. That is the entire point, it finds electronics regardless of power state.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWill it react to ordinary electronics?\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eYes. Interpreting the response is what the training and the price are for.\u003c\/p\u003e","products":[{"product_id":"cayman-st-402-non-linear-junction-detector","title":"Cayman ST-402 Non-Linear Junction Detector, 1.5 Metre Reach","description":"\u003cp\u003eThe Cayman ST-402 is the extended-reach version. Same 2 to 3GHz transmitter and same harmonic detection as the ST-401, on a telescopic bar that opens out to 1500mm.\u003c\/p\u003e\n\u003cp\u003eThat difference matters for ceilings, high shelving, wall cavities and the parts of a vehicle nobody can reach from a comfortable position. Three operating modes, 40 dB of manual sensitivity in five 8 dB steps, three 16 LED bars with speaker and headphone audio. Two 18650 cells give three to four hours, with four supplied, taking it to about eight hours on a full set. It weighs 1.75kg and ships in a shock-proof case.\u003c\/p\u003e","brand":"VIMEL","offers":[{"title":"Default Title","offer_id":67902689476928,"sku":"CAYMAN-ST-402","price":13900.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/6939\/1168\/files\/vimel-counter-surveillance-device-anti-spy-recorder-detect-anywhere-voice-recorder-hand-held-protection-safety-privacy-cayman-technology-detection-550x550.jpg?v=1793262066"},{"product_id":"cayman-st-401-403-non-linear-detector","title":"Cayman ST-401 Non-Linear Junction Detector, 2 to 3GHz","description":"\u003cp\u003eThe Cayman ST-401 finds electronics by what they are made of rather than what they are doing. It transmits between 2 and 3GHz and reads the harmonics that come back from semiconductor junctions, so a device that is switched off, has a flat battery, or has never transmitted at all still answers.\u003c\/p\u003e\n\u003cp\u003eAn elliptic antenna, three operating modes, and manual sensitivity across 40 dB in five 8 dB steps. Three 16 LED bars carry the reading, with a built-in speaker and headphones for audio. Two 18650 cells give three to four hours, the whole thing is 1.3kg, and two test targets ship with it so an operator can confirm the instrument before trusting it.\u003c\/p\u003e","brand":"VIMEL","offers":[{"title":"Default Title","offer_id":67902847877440,"sku":"CAYMAN-ST-401","price":13900.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/6939\/1168\/files\/listening-device-finder-550x550_07689036-4b50-4a6f-b900-3cc04dcea17f.jpg?v=1793262347"},{"product_id":"lornet-star24-nonlinear-junction-detector-professional-tscm-rf-bug-detection-system","title":"Lornet Star 24 Non-Linear Junction Detector, 3 Band Modular","description":"\u003cp\u003eThe Star 24 is the modular member of the Lornet range. Rather than one fixed transmit band it takes interchangeable 800MHz, 2400MHz and 3600MHz antenna modules, so the same detector head is tuned to the material and the environment in front of it.\u003c\/p\u003e\n\u003cp\u003eLower frequencies penetrate building fabric further; higher ones resolve smaller targets. Tuning steps follow the band: 200kHz at 800MHz, 2MHz at 2400MHz and 13MHz at 3600MHz. Peak output reaches 18W in pulse with CW averaging 300mW or less, receiver sensitivity is at or below -110 dBm, and detection range runs to about 50 metres in pulse and sub-metre in CW.\u003c\/p\u003e","brand":"Lornet","offers":[{"title":"Default Title","offer_id":67902908006720,"sku":"LORNET-STAR-24","price":15990.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/6939\/1168\/files\/professional-bug-detector-scanner-lornet-star24-550x550_41919d86-2fc7-4f00-828e-3aabed4f7e44.jpg?v=1793262526"},{"product_id":"lornet-star24s-nonlinear-junction-detector-advanced-counter-surveillance-system","title":"Lornet Star 24S Non-Linear Junction Detector, 2.4GHz","description":"\u003cp\u003eLornet Star 24S is the 2.4GHz handheld in the Lornet range: a nonlinear junction detector that finds semiconductor junctions whether or not the device containing them is powered.\u003c\/p\u003e\n\u003cp\u003eIt transmits between 2406 and 2414MHz at 10W peak in pulse or 200mW in CW, and reads the second harmonic at 4812 to 4828MHz and the third at 7218 to 7242MHz. Receiver sensitivity is at or below -110 dBm across 24 dB of dynamic range. Automatic channel search steps in 200kHz, 2MHz or 13MHz across five channels, with anti-jamming filtering. The detector head is 0.8kg on a removable 54 to 86cm telescopic rod, and two 12V 7.8Ah batteries run it for three hours in pulse.\u003c\/p\u003e","brand":"Lornet","offers":[{"title":"Default Title","offer_id":67902909514048,"sku":"LORNET-STAR24S","price":19590.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/6939\/1168\/files\/counter-surveillance-professional-bug-detector-non-linear-junction-sweeper-550x550_8d8a9aaa-ec25-4ede-afb2-288d4f043e8b.jpg?v=1793262528"},{"product_id":"lornet-36-enterprise-grade-3-6-ghz-parabolic-njd-counter-surveillance","title":"Lornet 36 Non-Linear Junction Detector, 3.6GHz Parabolic","description":"\u003cp\u003eAn RF sweep finds what is transmitting. A non-linear junction detector finds the semiconductor itself, powered or not, which is how a dormant implant is located at all.\u003c\/p\u003e\n\u003cp\u003eLornet 36 transmits between 3581.5 and 3607.5MHz through a 16 degree parabolic antenna and reads both the second harmonic at 7163 to 7215MHz and the third at 10744.5 to 10822.5MHz. Comparing the two is what separates a semiconductor junction from a corroded metal one. Pulse mode gives 18W peak for range; CW gives up to 12W for close localisation. Receiver sensitivity is at or below -110 dBm with 30 dB of dynamic range, and 22 dB of manual power adjustment.\u003c\/p\u003e","brand":"Lornet","offers":[{"title":"Default Title","offer_id":67902910136640,"sku":"LORNET-36","price":19590.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/6939\/1168\/files\/lornet-36-3.6ghz-parabolic-antenna-back-view-550x550_50e5bc0d-7ace-470e-86fe-63b0f380c03b.jpg?v=1793262529"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/6939\/1168\/collections\/counter1.png?v=1793585354","url":"https:\/\/www.securitylab.com.au\/collections\/non-linear-junction-detectors.oembed","provider":"Securitylab AU","version":"1.0","type":"link"}