Model: DT-830
Thermal Imaging Non-Linear Junction Detector/NLJD
General Configuration:
√ Working Frequency Range: 2.404GHz-2.472GHz
√ Receiving Harmonic Range: Manual or Auto
√ Receiving Sensitivity: Less than -140dBm
√ Battery: Lithium ion Battery, working over 5 Hours
√ Interactive Interface: LCD, Audio, Vibration
√ Detection Distance: GPS module @ 400-500mm; Mobile Phone @ 180-220mm; SIM Card @ 90-120mm
√ Array Format: 160 * 120 Continuous Scanning
√ Thermal Image Sensitivity: < 50mK
DT-830, the worldfirst Thermal Imaging Non-linear Junction Detector?
Description:
DT-830 is a new type of thermal imaging non-linear junction detector, which integrates the functions of thermal imaging and non-linear junction detector. It can detect electronic devices hidden in walls, floors, ceilings, lamps, furniture or containers, as well as judge the appearance of hidden electronic products, so as to facilitate rapid and accurate judgement by inspectors and improve the efficiency of security inspection. By means of thermal image display, vibration and sound prompt, the NLJD detector can quickly locate the hidden target.
Application Scenarios:
DT-830 thermal imaging non-linear junction detector can be widely used in government, public security, prison, justice, army, education examination, business security and personal privacy protection, etc.
Business Safety: Detecting unauthorized electronic devices, such as eavesdroppers, mobile phones and devices with SIM cards, hidden in company board rooms or secret offices;
Public Safety: Detecting electronic devices hidden or prohibited from use in safe areas, such as detonators, remote controllers, etc.
Personal Privacy Protection: Hidden cameras and surveillance devices such as recording pens, cameras, etc. in residential buildings and hotels.
Features:
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Fast Judgment of Hidden Object Types: Through thermal imaging function, we can quickly and intuitively judge the appearance of the electronic products under surveillance, and help the inspectors quickly judge the types of hidden electronic items.
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Strong Semiconductor Recognition Ability: Built-in spectrum analyzer supporting second and third harmonic detection can quickly and effectively identify devices and devices containing semiconductors.
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High Sensitivity: In particular SIM card devices have a high density of intelligence, which ensures that secret books and mobile communication devices can be quickly detected.
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Low False Positive Rate: The built-in optimized radar detection algorithm greatly improves the NLJD’s detection capability, and the false alarm rate is very low.
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Safe and Reliable: The characteristics of DT-830 Non-linear Junction Detector meet the requirements of electromagnetic radiation and are absolutely safe to the human body.
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Flexible and Simple Operation: The interface of this NLJD is simple and intuitive, the keys are few and concise, and it is easy to operate manually.
Specifications:
| Type | Parameter | Technical index |
| Non-linear Junction Parameters | Frequency band | 2400MHz |
| Voltage | 8.4V | |
| Frequency range | 2.404 GHz - 2.472 GHz | |
| Receiving 2nd~3rd Harmonic Range | 4.808 GHz-4.944 GHHz, 7.212 GHz-7.416 GHz |
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| Pulse mode transmit power (maximum) | 0~4W (ERIP) | |
| Receiving sensitivity | Less than -140dBm | |
| Adjustable range of transmitting power | 0.05-1W | |
| Receiving dynamic adjustable range | 30dB | |
| Battery Working Time in Maximum Power Pulse Mode | 5 hours | |
| Thermal Imaging Parameters | Array format | 160x120, continuous scanning |
| Pixel size | 12 um | |
| Thermal imaging sensitivity | < 50mK (0.050 C) | |
| FOV-horizontal | 57 ⁰ | |
| FOV-diagonal | 71 ⁰ | |
| Lens type | F/1.1 | |
| Other Parameters | Battery type | Replaceable lithium battery, standby for 4 hours |
| Charging time | Fast charging 2.5 hours/block | |
| Interactive interface | LCD Displays Received Harmonic Signal Intensity | |
| Audio prompts are supported and headphones can be connected. | ||
| Supporting Vibration Tips | ||
| LCD Display Imaging of Measured Objects | ||
| Detection distance | GPS module: 400-500mm Mobile phone: 180-220 mm |
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| Product size | 633(L)*111(W)*250mm(H) | |
| Outer box size | 690(L)*330(W)*180 mm(H) | |
| Product weight | 1.6kg | |
| working temperature | (-)20 ~ 45 degree | |
| Working humidity | No more than 85%, no condensate |
NLJD is a very niche market. Very limited supplier can make non linear junction detector integrated with thermal imaging. DT-830 is a cutting-edge detector if you are looking for top-high level NLJD detector.
Why Integrate NLJD & Thermal Imaging into One Device?
Combining Non-Linear Junction Detection (NLJD) and Thermal Imaging creates the ultimate TSCM (Technical Surveillance Counter-Measures) tool, offering unmatched detection capabilities for counter-surveillance, bug sweeping, and security inspections.
✅ 1. Detects Both Active & Passive Threats
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NLJD locates hidden electronics (even when powered off) by detecting semiconductor junctions.
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Thermal Imaging identifies heat signatures from active devices or recently used components.
✅ 2. Eliminates Inspection Blind Spots
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NLJD finds concealed bugs inside walls, furniture, or objects (RF-shielded or non-emitting).
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Thermal imaging confirms live transmissions, battery heat, or residual warmth for verification.
✅ 3. Faster, More Efficient Sweeps
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Reduces inspection time by 50%+ compared to using separate devices.
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No need to switch tools—one handheld device does it all.
✅ 4. Enhanced Accuracy & Reliability
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Cross-verification minimizes false positives/negatives (e.g., NLJD detects a device, thermal confirms activity).
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Ideal for high-security environments (government, military, corporate espionage prevention).
A Glance at DT-830 Thermal Imaging Non-linear Junction Detector
Performance Advantage:
A: The receiving sensitivity of DT-830 reaches -140dBm
B: The Operating temperature Range of DT-830 can meet -30–55℃
B: Can see clearly through the obstacles (like wall)
DT-830 Thermal Imaging Non-linear Junction Detector Demo Video
DT-830 Non-linear Junction Detector Unboxing
Technology Introduction of Non-linear Junction Detector(NLJD)
Typical Applications of Non-linear Junction Detectors
- Surveillance Detection: Sweep for active and passive surveillance devices to protect the privacy.
- Prison Security: Locate unauthorized mobile phones to prevent illegal communications.
- Venue Protection: Ensure the event venues are free from hidden electronics before high-profile gatherings.
- Threat Assessment: Detect suspicious packages or potential IEDs with high-risk search capabilities.
- Railway Safety: Safeguard public transportation from potential attacks.
- Arms Cache Detection: Find buried ammunition and arms caches with precision.
- Military and Civil Operations: Conduct thorough searches for hidden electronics in various operational contexts.
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