SZ Vodasafe VS-UJ2 Multi-Band Wireless Signal Interference Detector
The SZ Vodasafe VS-UJ2 is a fixed-installation RF interference monitoring device specially engineered to defend smart wireless security systems against malicious signal jamming attacks. Modern alarm, access control and IoT security equipment widely rely on 315MHz, 433MHz, 868MHz, cellular 2G/3G/4G/5G and Wi-Fi communication. Criminals deploy portable signal jammers to block alarm transmission, disable door sensors, cut off remote monitoring and steal property. VS-UJ2 provides 24/7 real-time RF scanning, instantly identifies jamming signals and triggers linkage alarm output to notify security staff of sabotage attempts.
Built with exclusive anti-false-alarm filtering algorithm and high-sensitivity broadband & narrowband dual detection modules, VS-UJ2 ignores daily consumer digital signals (mobile phones, Bluetooth, DECT landlines, household Wi-Fi) and low-frequency environmental background noise, delivering ultra-stable monitoring for banks, factories, residential communities, retail stores and confidential office premises. Compact lightweight ABS housing supports concealed wall-mounted cabinet installation with wide DC voltage compatibility for long-term unattended operation.
Features:
Zero False Alarm Design
1.Digital Signal Immunity Circuitry
The hardware circuit is isolated from normal consumer digital RF signals. Nearby smartphones, Bluetooth earbuds, indoor Wi-Fi routers and cordless DECT phones will not trigger false alarms, eliminating unnecessary security alert interruptions.
2.Built-in 500MHz Low-Frequency Background Noise Filter
Most ambient electromagnetic clutter (power adapters, remote controls, electrical equipment) falls below 500MHz. The proprietary filter suppresses all sub-500MHz signals, drastically reducing false triggers caused by daily electrical interference.
3.Industry-Leading Ultra-High Detection Sensitivity
Wideband cellular/Wi-Fi jammer detection: Captures 300mW mobile signal jammers from up to 20 meters away
Narrowband RF transmitter detection: Identifies 20mW single-channel 315/433/868MHz jamming sources at a maximum 15-meter distance
Outperforms mainstream single-band detectors in detection range and weak signal capture capability.
Adjustable Sensitivity Tuner
Rotary sensitivity knob allows continuous fine-tuning:
Max sensitivity: Extend scanning distance for large-area perimeter monitoring
Min sensitivity: Narrow detection range for small enclosed spaces to avoid cross-interference from adjacent zones
Users customize detection coverage based on site layout and equipment density.
Complete Relay Alarm Linkage System
Equipped with 1.0A NO/NC (Normally Open / Normally Closed) dry relay output for seamless integration with alarm hosts, sound-light sirens, access control panels and security platforms:
Instant relay trigger once jamming signals are detected
Power failure & power-cut anti-tamper alert: Automatically activates alarm output if device power supply is disconnected or fails, preventing sabotage by cutting detector power
Supports wired linkage with existing security infrastructure without extra signal converters.
Intuitive 8-Level LED Signal Strength Indicator
8-segment LED bar graph visualizes real-time jamming signal intensity:
Fewer lit LEDs: Weak distant interference source
Full LED illumination: Strong nearby jammer equipment
Security operators quickly judge signal strength and approximate source distance without complex display screens.
Compact & Stable Fixed Installation Structure
Ultra-small footprint with lightweight construction, suitable for hidden installation inside security cabinets, monitoring rooms or wall-mounted junction boxes; wide DC input voltage adapts to centralized power supply systems of industrial and commercial buildings, stable continuous operation 24/7 all year round.
Full Detection Frequency Bands
VS-UJ2 dual-channel detection covers all mainstream jamming frequencies threatening wireless security systems:
Wideband Detection Channel
Global cellular bands: 2G/3G/4G/5G Sub-6GHz mobile communication jamming signals
Wi-Fi full band: 2.4GHz & 5.8GHz wireless network jamming interference
Narrowband Detection Channel
315MHz, 433MHz, 868MHz RF wireless alarm jamming signals
Targets common jamming devices used to disable door magnetic sensors, infrared detectors, wireless alarm panels and vehicle anti-theft systems.
Technical Specifications
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Brand
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SZ Vodasafe
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Model
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VS-UJ2
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Detection Modes
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Dual-channel Wideband + Narrowband RF scanning
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Detectable Frequencies
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Wideband: Cellular 2G/3G/4G/5G, 2.4G/5.8G Wi-Fi
Narrowband: 315MHz, 433MHz, 868MHz
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Max Detection Distance
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300mW cellular jammer: 20m
20mW single-channel RF jammer: 15m
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Sensitivity Control
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Continuously adjustable rotary tuner
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Signal Display
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8-level LED strength indicator
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Alarm Output
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1.0A NO/NC dry relay contact; power-cut & power-failure tamper alert
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Operating Voltage
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DC 9V ~ 16V
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Working Current
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150mA typical
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Housing Material
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Impact-resistant ABS plastic
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Overall Dimensions
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L11.6 × W7 × T3.3 cm (excluding external antenna)
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Net Weight
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Approx. 170g
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Installation Method
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Fixed wall-mounted / cabinet built-in
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Operating Environment
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Temperature: -10℃ ~ +50℃; Humidity: 10%~90% non-condensing
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Core Certifications
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CE, FCC compliant
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Warranty
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Standard 1-year factory warranty
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Main Application Scenarios
Financial Institutions
Bank vaults, teller counters, cash transport stations, ATM monitoring rooms – prevent criminals from jamming wireless alarm and emergency call systems during robbery attempts.
Commercial & Retail Premises
Shopping malls, chain stores, jewelry shops, supermarkets – protect wireless door sensors, anti-theft alarm panels and remote video monitoring from RF blocking attacks.
Residential & Property Security
High-end residential compounds, villa zones, community security control rooms – safeguard wireless perimeter alarms, window magnetic sensors and building intercom systems.
