What does the app show?
- Signal gauge: live signal strength in dB and the operating frequency (730 Hz)
- Status and guidance: live hints such as “Scanning… keep the coil parallel to the ground and sweep slowly”
- Depth: estimated depth on a 0–8 m scale
- Target: target type by conductivity, with a “Gold detected” alert
- Signal history: a graph of the last 3 seconds
- Oscilloscope: the pulse decay curve and the sampling point
The bottom bar has Scan, Map, Log and Settings tabs. The detector's speaker also renders signal strength as a tone; the phone screen shows the same information as numbers and graphics.
Real-time communication with the device
The app connects to the detector's control box and receives measurement data without delay. Every time the coil fires a pulse, the sampled decay value, signal level and target classification update on the phone, so the user can see where and how to move the coil.
This turns the phone into a full control panel for detectors with a small screen or none at all. To adapt the app to your own device, see metal detector app development.
HS Detector specifications
- Principle: pulse induction (PI-5), 730 Hz pulse rate
- TX/RX board: MOSFET driver, 120 µs pulse, 15 µs sampling
- Coil: mono Ø33 cm (24 turns) or 2×2 m frame
- Power: 8 × 18650 Li-ion battery, 14.8 V
- Housing: IP68 control box, 6-button handle with status LED
- Mechanics: 3-section telescopic carbon shaft, one-move cam lock, adjustable arm rest
For the signal processing side, see pulse induction detector software.
Deep search with a 2×2 m frame coil
The Ø33 cm mono coil is for small targets near the surface; in the demo video it finds a gold nugget at 22 cm. The 2×2 m frame coil is for deep search on large targets; in the video it detects a gold chest at 5 metres.
Achievable depth depends on the target size, the mineral content of the ground and the coil; the app estimates depth for the selected coil. For gold-focused screens, see gold detector app.
Technical architecture: data flow
The coil fires 730 pulses per second; the MOSFET TX/RX board samples the decay after each pulse and the control box sends the measurement to the mobile app in real time. The app shows signal, oscilloscope, depth and target type; the speaker renders signal strength as a tone.
flowchart LR B["Coil: mono Ø33 cm / 2×2 m frame"] --> TX["MOSFET TX/RX board: 730 Hz, 120 µs pulse, 15 µs sample"] TX --> K["IP68 control box"] K -->|"live data"| A["iOS app"] K --> H["Speaker: tone = signal"] A --> S1["Signal dB and threshold"] A --> S2["Oscilloscope"] A --> S3["Depth estimate"] A --> S4["Target type, gold alert"]
What I offer
Live signal
Coil data on the phone without delay
dB gauge
Signal strength and 730 Hz frequency
Oscilloscope
Live pulse decay curve
Depth
Estimated depth 0–8 m
Target type
Alert when gold is detected
4 tabs
Scan, Map, Log, Settings
Technologies I use
How we work
Free intro call
We clarify needs, existing systems and goals together.
Quote & roadmap
Scope, technology, timeline and budget within 24 hours.
Staged development
Weekly demos and a live test environment.
Launch & support
Go-live, training and ongoing maintenance.
Free pre-analysisThe first meeting and roadmap are completely free, with no obligation.
Staged delivery and approvalYou review each module on a test environment before we move on.
Written scope and rightsScope, delivery and source code rights are defined in the contract.
Frequently asked questions
What does the HS Detector app do?
It connects to the detector and shows signal strength, oscilloscope, estimated depth and target type live on the phone.
Which coils are supported?
A Ø33 cm mono coil and a 2×2 m frame coil; the depth estimate is based on the selected coil.
How deep can the detector search?
Depth depends on target size, ground and coil. The demo video shows a large target detected at 5 metres with the 2×2 m frame coil.
Can the app tell gold apart?
The app shows the target type by conductivity and gives a “Gold detected” alert when the target is classified as gold.
Can I have this app built for my own detector?
Yes. I build device-specific mobile apps for detector manufacturers; details on the metal detector app development page.