Description

ST-500 PIRANHA Multifunctional TSCM Detection Device

Four detection channels. Wireless and wired inspection. One professional platform for investigating electronic surveillance and data leakage channels.

The ST-500 PIRANHA is a multifunctional TSCM detection device designed to detect, analyze and help localize electronic surveillance transmission channels across wireless, infrared and wired environments.

Instead of focusing on a single detection method, the ST-500 combines four dedicated inspection channels:

Selective HF Detection → IR Detection → Wired Receiver → Low Frequency Amplification

This architecture allows qualified TSCM professionals to investigate different types of potential electronic surveillance and data leakage channels using one portable instrument.

What Is the ST-500 PIRANHA?

The ST-500 PIRANHA is a multifunctional detection device for TSCM and electronic surveillance inspection.

It is designed around the principle that electronic surveillance can communicate through different transmission paths.

A potential surveillance device may transmit:

• Through radio frequencies
• Through infrared
• Through electrical mains
• Through telephone or other low-current lines
• Through other wired communication paths

A single RF detector cannot address all of these possibilities.

The ST-500 therefore combines multiple detection channels within one instrument.

The objective is not simply to detect “a signal.”

It is to help the operator determine:

What type of transmission may be present?

Where is it appearing?

Is it new or already present in the environment?

Can the signal be analyzed further?

Does the finding justify physical verification?

Four Detection Channels in One Platform

1. Selective HF Detector

The Selective HF Detector covers 20 MHz–6000 MHz.

It is designed to investigate analog and digital radio transmissions associated with active electronic surveillance devices.

Supported signal categories include:

• GSM
• CDMA
• LTE
• Bluetooth
• WiFi

The RF channel provides several analysis modes, including:

• Panorama
• Differential
• Automated
• Wireless Communication
• Fixed-frequency analysis
• Oscilloscope analysis
• Audio analysis

This allows an operator to move from broad spectrum observation toward more focused analysis of a detected signal.

2. Infrared Detector

The dedicated IR Detector is designed to detect infrared transmitters.

Its purpose is different from thermal imaging or passive infrared motion detection.

The channel investigates infrared transmission used by electronic surveillance equipment to transmit information.

The IR channel can display detected signal information graphically and acoustically, while its differential mode can assist with locating the source of an observed IR signal.

This makes the IR channel a complementary TSCM capability rather than a general-purpose infrared camera.

3. Wired Receiver

The Wired Receiver investigates high-frequency signals carried through:

• Electrical mains
• Telephone lines
• LAN and low-current cabling
• Other low-current circuits

The specified operating range is:

100 kHz–180 MHz

The channel supports:

• Panorama analysis
• Differential analysis
• Automated search
• Fixed-frequency analysis
• AM/FM demodulation
• Oscilloscope analysis

This provides a dedicated method for investigating potential surveillance transmission channels that do not rely on conventional wireless RF radiation.

4. Low Frequency Amplifier

The Low Frequency Amplifier covers:

20 Hz–25 kHz

It is designed to investigate low-frequency signals that may be present on wired circuits.

The gain can be selected across multiple amplification levels:

1× / 2× / 5× / 10× / 20× / 50× / 100×

The channel can therefore be used as part of a broader investigation of low-frequency wired transmission paths.

RF Spectrum Detection and Analysis

The ST-500 does more than display that RF energy exists.

The Selective HF Detector can scan the 20 MHz–6 GHz range and present detected activity through graphical and analytical interfaces.

Operators can examine:

• Signal frequency
• Signal level
• Continuous signals
• Pulse signals
• Spectrum activity
• Demodulated information
• Oscilloscope response
• Previously observed signals

The device also supports fine frequency tuning and selectable analysis bandwidth.

This provides a more structured workflow than simply moving around a room while watching a single signal-strength meter.

Differential Detection

One of the useful functions of the ST-500 is Differential Mode.

An operator can first establish the RF environment at one location and then compare subsequent measurements against that baseline.

New or changing signals can therefore receive additional attention.

This is particularly useful in environments with substantial legitimate wireless activity.

For example, an inspection may begin with:

Baseline Environment → Differential Measurement → New Signal → Signal Analysis → Localization → Verification

The purpose is to help reduce unnecessary attention to signals that are already known to be present.

Differential detection does not automatically determine that a newly detected signal is a surveillance device.

It identifies a change that requires interpretation.

Automated Signal Detection

The Automated Mode is designed to register signals exceeding an adaptive detection threshold within the selected frequency limits.

Detected signals can be categorized within the system according to configured signal classifications.

The manufacturer documentation describes categories including:

• Threat
• Non-Threat
• Unknown

These classifications are based on configured frequency-band information and should be treated as an analytical aid rather than an independent determination of hostile intent.

A “threat” classification does not by itself prove that a physical surveillance device is present.

Professional verification remains necessary.

Wireless Communication Analysis

The ST-500 includes a Wireless Communication mode for monitoring frequency bands associated with digital communication standards.

This supports investigation of signals associated with:

• GSM
• CDMA
• Bluetooth
• LTE
• WiFi

Regional and user-defined frequency-band information can also be configured through the associated software environment.

This is particularly relevant when the RF environment contains many legitimate communication systems and the operator needs to focus the inspection on particular bands.

Base Station and Mobile Communication Monitoring

The ST-500 can distinguish and monitor signal activity associated with mobile communication infrastructure and mobile digital communication devices.

This provides additional context when analyzing cellular RF environments.

The important distinction is:

Signal classification is not the same as device identification.

A detected GSM, LTE or other mobile signal does not automatically identify a specific handset, tracker or surveillance device.

The result must be interpreted within the physical inspection environment.

Signal Localization

Detection is only the first stage of a TSCM investigation.

Once a potentially relevant signal has been identified, the operator can use signal level, frequency analysis, audio analysis and repeatable movement through the inspected area to help localize the source.

The manufacturer describes a workflow based around:

Detection → Identification → Localization

The actual localization result depends on:

• Transmitter output power
• Distance
• Environmental RF conditions
• Interference
• Building construction
• Antenna position
• Signal behavior
• Operator technique

The ST-500 therefore provides localization assistance rather than an automatic exact-position determination.

Infrared Signal Localization

The IR channel includes a Differential Mode that establishes a reference level and displays changes from that baseline.

This can help the operator investigate the direction or location of an observed infrared transmission.

As with RF detection, the result should be physically verified before concluding that an identified signal belongs to a surveillance device.

Wired Surveillance Detection

Not every electronic surveillance system needs to radiate a conventional wireless signal.

Some systems may transfer information through:

• Power lines
• Telephone circuits
• Low-current wiring
• Other conductive communication paths

The ST-500’s Wired Receiver is designed specifically for this inspection problem.

It can investigate signals from 100 kHz to 180 MHz on connected circuits.

The instrument provides multiple analysis modes so the operator can move from broad line inspection toward more detailed signal analysis.

Low-Current and Telephone Line Inspection

The ST-500 can be connected to appropriate low-current circuits and telephone lines using the supplied connection accessories.

Depending on the circuit under investigation, the operator can:

Scan → Identify an abnormal signal → Select the affected line → Analyze → Apply appropriate test conditions → Localize → Verify

The equipment should be used according to the circuit type, applicable electrical safety procedures and the manufacturer’s operating instructions.

Wired Electret Microphone Investigation

The ST-500 includes bias-voltage functionality for investigating certain wired microphone configurations.

Applying an appropriate bias voltage can assist in testing wired electret microphones connected to compatible circuits.

This is an investigative function—not a guarantee that every wired microphone will respond.

Actual results depend on:

• Microphone configuration
• Circuit design
• Wiring
• Existing voltage
• Transmission method
• Circuit condition

Spectrum Analyzer and Oscilloscope Functions

The ST-500 provides additional signal-analysis functions beyond basic detection.

Spectrum Analysis

Spectrum analysis helps the operator examine the distribution of signal energy across frequency.

This can help answer:

Where is the signal located in frequency?

Oscilloscope Analysis

Oscilloscope functionality provides time-domain information about the detected or demodulated signal.

This can help answer:

What does the signal behavior look like over time?

Audio Analysis

Where appropriate, demodulated signals can also be monitored through headphones or the built-in speaker.

Audio analysis may provide another layer of information when investigating analog or otherwise demodulatable transmissions.

These analytical functions should be interpreted by trained operators rather than treated as automatic device identification.

ST-500 in a Professional TSCM Workflow

The ST-500 is best understood as part of a structured inspection process.

1. Establish the Environment

Identify legitimate wireless infrastructure and known communication sources.

2. Scan

Use the Selective HF Detector to examine the relevant RF spectrum.

3. Compare

Use Differential Mode to identify signals that differ from the established environment.

4. Analyze

Examine suspicious signals through frequency, spectrum, oscilloscope or audio functions.

5. Classify

Use the device’s configured signal classifications and professional judgment to determine which findings require additional attention.

6. Localize

Use repeatable measurements and signal-level changes to narrow the likely source area.

7. Inspect Wired Paths

Where appropriate, examine mains and low-current circuits using the Wired Receiver and LFA channels.

8. Investigate Infrared

Use the dedicated IR channel where an infrared transmission is a relevant possibility.

9. Physically Verify

Identify the actual source, device, component or legitimate infrastructure responsible for the observed response.

10. Document

Record the detection, conditions, analysis, localization process and final finding.

Detect → Analyze → Localize → Verify → Document

Designed For & Common Applications

Professional TSCM Sweeps

The ST-500 is designed for technical surveillance countermeasure inspections where multiple transmission paths need to be investigated.

Corporate Security

Security teams can use qualified TSCM specialists to investigate sensitive offices, meeting rooms and executive environments.

Government and Institutional Security

The combination of wireless, infrared and wired inspection channels can support security assessments in sensitive facilities.

Executive and Boardroom Inspections

The RF and wired channels can be used to investigate communication paths within areas where confidential discussions take place.

High-Sensitivity Information Environments

Facilities handling confidential information may require investigation of both wireless and conductive data leakage channels.

Professional Investigation

The device can support specialist investigators examining suspected electronic surveillance equipment and transmission paths.

Telecommunications and Low-Current Infrastructure

The Wired Receiver and LFA provide dedicated capabilities for examining signals present on selected conductive circuits.

What ST-500 Can and Cannot Do

What It Can Do

The ST-500 can help qualified operators:

• Scan RF activity from 20 MHz to 6 GHz
• Analyze supported wireless communication signals
• Identify configured digital signal categories
• Compare current RF activity with an established baseline
• Analyze selected signals through spectrum and oscilloscope functions
• Perform audio analysis where applicable
• Detect infrared transmissions
• Investigate wired high-frequency signals from 100 kHz to 180 MHz
• Analyze low-frequency wired signals from 20 Hz to 25 kHz
• Investigate certain wired electret microphone configurations
• Support localization of detected transmission sources
• Connect to a PC for additional software-supported analysis

What It Cannot Automatically Do

The ST-500 does not automatically:

• Prove that every detected signal is a surveillance device
• Identify the exact physical device responsible for every signal
• Determine hostile intent
• Distinguish every legitimate wireless device from every surveillance device
• Detect every camera
• Detect every GPS tracker
• Detect passive infrared cameras
• Detect laser microphones as a dedicated laser detector
• Read communications content
• Provide universal identification of a Flipper Zero or other multifunction device
• Replace physical inspection or professional TSCM methodology

The correct professional interpretation is:

Detection ≠ Identification ≠ Attribution ≠ Threat Assessment

ST-500 vs Conventional RF Detector

Capability	Conventional RF Detector	ST-500 PIRANHA
RF detection	Yes	Yes
RF range to 6 GHz	Model-dependent	Yes
Differential RF analysis	Model-dependent	Yes
Automated RF search	Model-dependent	Yes
Spectrum analysis	Model-dependent	Yes
Oscilloscope analysis	Usually limited	Yes
Audio analysis	Model-dependent	Yes
IR transmission detection	Usually no	Yes
Wired high-frequency detection	No	Yes
Low-frequency wired analysis	No	Yes
Wired microphone investigation	No	Yes
Multi-channel TSCM workflow	Limited	Yes

The difference is not simply frequency range.

A conventional RF detector may answer:

“Is RF activity present?”

The ST-500 is designed to support a broader investigation:

“What transmission channels are present, what changed, how can the signal be analyzed, and where should the operator investigate next?”

ST-500 vs Spectrum Analyzer

A spectrum analyzer is optimized for detailed RF measurement and signal characterization.

The ST-500 is optimized around a broader TSCM inspection workflow.

Requirement	Spectrum Analyzer	ST-500 PIRANHA
Detailed RF measurement	Strong	Supported
RF spectrum inspection	Yes	Yes
TSCM-oriented automated search	Model-dependent	Yes
Differential search	Model-dependent	Yes
IR transmission detection	No	Yes
Wired signal inspection	No	Yes
Low-frequency wired analysis	No	Yes
Wired microphone investigation	No	Yes
Multi-channel TSCM platform	No	Yes

The two technologies can therefore serve different purposes and may complement one another in a professional inspection environment.

Professional Selection: What Should Buyers Evaluate?

Before procurement, professional users should consider:

• Required RF frequency range
• Types of wireless technologies present at the inspection sites
• Need for differential detection
• Need for automated signal search
• Requirement for spectrum analysis
• Requirement for oscilloscope analysis
• Requirement for audio analysis
• IR transmission detection requirements
• Power-line inspection requirements
• Low-current line inspection requirements
• Telephone-line inspection requirements
• Need for wired microphone investigation
• PC/software workflow
• Operator training
• Electrical safety requirements
• Regional RF environment
• Documentation and reporting requirements
• Manufacturer or specialist technical support

The most important question is not:

“How many frequencies can it detect?”

It is:

“Does the detection architecture match the transmission paths I actually need to investigate?”

Technical Specifications

Parameter	Specification
Product Type	Multifunctional TSCM Detection Device
Selective HF Detector	20–6000 MHz
HF Passband	1 MHz / 20 MHz
HF Input Impedance	50 Ω
HF Scanning Speed	18 GHz/s
HF Minimum Detection Level	−70 dB
HF Dynamic Range	50 dB
IR Spectral Range	0.75–1.1 µm
IR Detection Passband	5 MHz
IR Field of View	±20°
IR Minimum Detectable Power	10⁻¹³ W/Hz½
Wired Receiver	0.1–180 MHz
Wired Receiver Scan Time	Approx. 2 seconds for full range
Wired Receiver Minimum Detection Level	−50 to −75 dBm
Wired Receiver Dynamic Range	50 dB
Wired Receiver Input Impedance	100 Ω
Wired Receiver Demodulation	AM / FM
Wired Receiver Input Filter	180 kHz
Low Frequency Amplifier	20–25,000 Hz
LFA Input Impedance	200 kΩ
LFA Gain	1× / 2× / 5× / 10× / 20× / 50× / 100×
LFA Maximum Input	±60 V DC / ±1 V AC
LFA Noise Spectral Density	3 nV/Hz
Bias Voltage	+30 V / −30 V
Battery	Built-in 3.7 V lithium-polymer battery
Power Consumption	<1 W
Operating Time	>4 hours at maximum power
Recharge Time	Approx. 7 hours
Main Unit Dimensions	165 × 100 × 40 mm
Main Unit Weight	470 g

Specifications should be confirmed against the current manufacturer documentation and supplied configuration before procurement.

Included Equipment

The standard ST-500 configuration documented by the manufacturer includes the main unit and accessories for wireless and wired inspection, including:

• ST-500 main unit
• Telescopic HF antenna
• Charger
• Headphones
• PC connection cable
• USB flash drive with software/manual
• Telephone-line connection accessories
• Low-current line connection cable
• RJ11/RJ45 couplers and splitters
• Multicore cable connection adapter
• Transportation case

Important: The manufacturer documentation states that the test sound source is not included in the package and can instead be provided by a suitable portable device such as a smartphone, tablet or voice recorder.

The current manufacturer information also states that an induction/magnetic sensor is not included in the ST-500 kit and is associated with the separately purchased ST-600.

Accessory configurations should therefore be confirmed before purchase.

Frequently Asked Questions

What is the ST-500 PIRANHA?

The ST-500 PIRANHA is a multifunctional TSCM detection device designed to investigate wireless, infrared and wired electronic surveillance transmission channels.

What does ST-500 detect?

Its four detection channels cover:

• RF signals from 20 MHz to 6 GHz
• Infrared transmissions
• Wired high-frequency signals from 100 kHz to 180 MHz
• Low-frequency wired signals from 20 Hz to 25 kHz

Is ST-500 an RF detector?

Yes, but it is more than a conventional RF detector. It combines selective HF detection with IR, wired receiver and low-frequency amplification channels.

What RF frequency range does ST-500 cover?

The Selective HF Detector operates from 20 MHz to 6000 MHz.

Can ST-500 detect GSM and LTE?

Yes. The manufacturer documentation identifies GSM and LTE among the supported digital communication signal categories.

Can ST-500 detect Bluetooth and WiFi?

Yes. Bluetooth and WiFi are among the supported wireless signal categories.

Does ST-500 identify a specific phone?

Not automatically. It can identify or classify detected signal characteristics and communication categories, but signal classification should not be interpreted as unique physical-device identification.

Can ST-500 detect GPS trackers?

It may detect radio transmissions from tracking devices when their transmission falls within the detector’s capabilities and operating conditions. It should not be presented as a universal GPS-tracker detector.

Can ST-500 detect a switched-off surveillance device?

The ST-500’s RF and IR channels are primarily concerned with transmission signals. A switched-off device that produces no relevant transmission cannot be assumed to be detectable through those channels.

Other TSCM technologies, such as nonlinear junction detection, may be appropriate for investigating non-transmitting electronics.

Does ST-500 detect hidden cameras?

It can detect relevant radio or infrared transmissions from electronic surveillance devices where the transmission falls within its detection capabilities.

It is not a dedicated optical hidden-camera lens detector and should not be marketed as detecting every hidden camera.

Does ST-500 detect passive infrared cameras?

No. The IR channel is designed for detecting infrared transmissions, not passive infrared motion sensing.

Can ST-500 detect laser microphones?

ST-500 does not provide a dedicated laser microphone detection channel. Laser-based surveillance requires appropriate specialist detection methodology.

Does ST-500 detect Flipper Zero?

The ST-500 detects RF activity within its supported frequency range, but it should not be marketed as a dedicated Flipper Zero detector or as automatically identifying the device.

What is the Wired Receiver used for?

The Wired Receiver investigates high-frequency signals present on power and low-current lines from approximately 100 kHz to 180 MHz.

Can ST-500 inspect telephone lines?

Yes. The supplied configuration includes telephone-line connection accessories and the manufacturer documents telephone-line inspection procedures.

Can ST-500 investigate wired microphones?

Yes, within applicable configurations. The device provides bias-voltage functionality that can assist in investigating certain wired electret microphone arrangements.

What is Differential Mode?

Differential Mode establishes a reference and helps identify changes in the detected environment. In RF inspection, this can help highlight newly appearing or changing signals.

Does ST-500 eliminate false alarms?

No detection system should be presented as eliminating false alarms automatically.

Differential analysis, signal classification and further signal analysis can help operators distinguish findings that require attention, but professional interpretation remains necessary.

Does ST-500 provide spectrum analysis?

Yes. The device supports spectrum-analysis functionality for examining detected signals.

Does ST-500 provide oscilloscope analysis?

Yes. Oscilloscope functionality is available for additional signal analysis.

Can ST-500 analyze audio?

Yes, where the detected signal can be appropriately demodulated. Audio can be monitored through headphones or the built-in speaker.

Is ST-500 suitable for professional TSCM?

Yes. Its architecture is specifically designed around the detection and localization of wireless, infrared and wired surveillance transmission channels.

Is ST-500 suitable for beginners?

The device provides multiple professional analysis modes and is best used by operators who understand RF, wired-line inspection and TSCM procedures.

Does ST-500 replace a nonlinear junction detector?

No.

An NLJD addresses a different detection problem: investigating electronic components that may be present even when they are not actively transmitting.

The ST-500 primarily investigates transmission channels.

For comprehensive TSCM work, the two technologies can be complementary.

Does ST-500 replace a spectrum analyzer?

Not necessarily.

The ST-500 provides spectrum-analysis functionality within a broader TSCM platform, while a dedicated spectrum analyzer may provide deeper RF measurement and characterization capabilities depending on the model.

What is the biggest advantage of ST-500?

Its primary advantage is multi-channel TSCM coverage.

Instead of relying only on conventional RF detection, the ST-500 combines:

RF → IR → Wired HF → Low Frequency

within one inspection platform.

Professional TSCM Equipment vs Single-Purpose Detectors

Single-purpose detectors can be useful when the inspection requirement is narrow.

A professional TSCM investigation, however, may require examination of several potential transmission paths.

The difference is therefore not simply whether one device is “better.”

It is whether the equipment supports the investigation methodology required by the environment.

A single RF detector may answer:

“Is there RF activity?”

The ST-500 can extend the investigation toward:

“What RF activity is present?”

“What changed?”

“Can the signal be analyzed?”

“Is there an infrared transmission?”

“Is there a signal on a wired line?”

“Is there low-frequency activity?”

“Where should the operator investigate next?”

That broader architecture is the reason the ST-500 belongs in the professional TSCM equipment category.

Procurement & Deployment Considerations

Before deployment, professional buyers should confirm:

• Current hardware revision
• Current firmware/software version
• Regional RF requirements
• Required frequency-band configuration
• Included accessories
• Electrical connection requirements
• Operator training
• Site safety procedures
• Applicable legal requirements
• Technical support availability

When inspecting electrical circuits, operators should follow the manufacturer’s procedures and the electrical safety requirements applicable to the installation.

The ST-500 should be treated as professional inspection equipment—not as an automatic surveillance-device classifier.

Global Procurement Through Archthetic

Archthetic connects professional buyers with specialized TSCM technologies from international technology ecosystems.

For the ST-500 PIRANHA, the procurement process is designed around:

Discover → Evaluate → Confirm Configuration → Procure → Deploy

Before purchase, professional buyers can evaluate the detection architecture, technical specifications, intended inspection environment and required accessories.

The objective is not simply to purchase another detector.

It is to select a detection platform that matches the transmission paths, operational requirements and professional TSCM methodology of the organization.

Focused Conclusion

The ST-500 PIRANHA is a multifunctional TSCM detection platform built around four complementary inspection channels:

Selective HF Detection

Infrared Transmission Detection

Wired High-Frequency Detection

Low-Frequency Analysis

Its value comes from bringing these capabilities together with differential search, automated detection, signal classification, spectrum analysis, oscilloscope analysis and audio analysis.

It does not automatically identify every electronic device or establish hostile intent.

Its role is more practical:

Detect → Analyze → Localize → Verify → Document

For professional TSCM teams investigating wireless, infrared and wired data leakage channels, the ST-500 provides a broader inspection architecture than a single-purpose RF detector.

Four channels. Multiple transmission paths. One professional TSCM investigation platform.