VT-811 Advanced Non-Linear Junction Detector for High-End Privacy Protection
The VT-811 combines harmonic detection with a wireless signal detection unit, so a sweep covers both devices that are dormant and devices that are actively transmitting, including 5G at 2.6, 3.5 and 4.9 GHz. Differential detection rejects distant signal sources, which is what stops a city-centre sweep alarming on everything. Detection distance reaches 400 to 500 mm for a GPS module.
Key benefits
- Harmonic detection plus a wireless signal detection unit in one instrument
- Detects 5G signals at 2.6 GHz, 3.5 GHz and 4.9 GHz with on-screen alert
- Differential detection excludes interference from distant signal sources
- High-gain antenna gives long range on SIM-card devices
- 400 to 500 mm detection distance on a GPS module, 150 to 220 mm on a cell phone
Problems it solves
- Harmonic-only sweeps miss what an RF sweep would catch, and the reverse
- Nearby transmitters cannot be separated from distant ones
- SIM-card devices are the specific risk but hardest to localise
- Two separate instruments mean two sweeps of the same room
Who it is for
- Security teams needing both dormant and active device detection
- Auditors working in dense RF environments where false alarms are constant
- Organisations specifically concerned with SIM-card devices
Application scenarios
- Corporate meeting rooms and confidential offices
- Corporate security and facility audits in sensitive areas
- Residential and hotel checks for recorders and cameras
- Locating remote controls and transmitters in restricted zones
Technical features
- S-band fundamental transmission with 2nd and 3rd harmonic reception
- AI harmonic pattern analysis
- Differential detection principle for nearby signal isolation
- Lossless detection algorithms to minimise false alarms
- High-gain antenna
Specifications
| Detection Principle | Non-linear junction plus wireless signal detection |
|---|---|
| Wireless Bands | 5G at 2.6 GHz, 3.5 GHz and 4.9 GHz |
| Detection Distance, GPS Module | 400 mm to 500 mm |
| Detection Distance, Cell Phone | 150 mm to 220 mm |
| Transmit Power | 4 W |
| Battery | 7.4 V |
| Operating Time | approximately 2.5 hours |
| Weight | 1.6 kg |
| Extended Length | up to 750 mm |
| Operating Temperature | -30°C to 55°C |
Figures are those published by the factory for this model. Where a value is shown as TBC it is not published, and we will confirm it with the factory before you order rather than estimate it.
Compared with other models in the range
The VT-801 and VT-802 detect the semiconductor only. The VT-811 adds the wireless unit, so one pass covers dormant and transmitting devices, at 1.6 kg and around 2.5 hours of runtime rather than 4.
Use guide
- Charge before a sweep, runtime is around 2.5 hours
- Use harmonic detection for dormant devices and the wireless unit for active ones
- Rely on differential detection to ignore distant transmitters
- Work within 400 to 500 mm of a surface for GPS-module-class targets
- Operate between -30°C and 55°C
Product images
Where this product is used
Part of Non-Linear Junction Detectors · typically specified for:
VT-811 Advanced Non-Linear Junction Detector for High-End Privacy Protection FAQ
What does the wireless unit add
It captures signals being transmitted and received, including 5G at 2.6, 3.5 and 4.9 GHz, and shows the suspected location on screen.
Will nearby phone traffic cause constant alarms
Differential detection is used specifically to exclude interference from distant signal sources.
What detection range does it give
400 to 500 mm for a GPS module and 150 to 220 mm for a cell phone.
How long does it run
Approximately 2.5 hours from a 7.4 V battery at 4 W.
How heavy is it
1.6 kg, extending to 750 mm.
What temperature range is it rated for
-30°C to 55°C.
Which model should we buy
Tell us on WhatsApp whether your concern is dormant devices, active transmitters or both, and we will recommend between the VT-801, VT-802 and VT-811.
Quotation for the VT-811 Advanced Non-Linear Junction Detector for High-End Privacy Protection
Send your destination port and quantity. We will come back with price, lead time and what documentation the factory can supply for your market.