Stud sensor finds current on large wall area

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How do stud sensors actually sense current,

Basic stud sensors are designed to detect the edges of wooden studs, they are not designed to detect live electric wiring in the wall. Electronic stud detectors are sensing changes in the dielectric constant of the wall.

Some stud sensors also incorporate a separate type of detector for detecting live electrical wiring.

These electricity detectors don't sense current at all. What they sense is voltage alternating at 50 or 60 cycles a second. There are separate devices for sensing current. This distinction is important because an alternating voltage of 110 (or 230) volts is detectable (and potentially dangerous) even if there is currently no detectable current.

non-contact voltage (NCV) detectors generally sense alternating voltage (an alternating electric field) using capacitive coupling. Which means they are very dependent on operating conditions.

Fluke have a description that you may find helpful.

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Sooner or later, all homeowners will want to securely hang or brace some heavy item on a wall inside the house. Since most walls in a house are built of sturdy vertical 2-by-4 wood supports, called studs, it is imperative that any fastener supporting a heavy mirror, picture, wall shelf or other substantial item be anchored into a stud for safety reasons.

Finding a wall stud can be a bit daunting because the studs are hidden by the finished surface of the wall. The easiest way to find a hidden stud is to use an electronic stud sensor. This battery-operated device is available from most home centers for about $20. The tool, about the size of a TV remote control, finds a stud by sensing a change in wall density as it is brushed across the surface of the wall.

A light illuminates or a beep is heard when it is directly over a hidden stud. As great a tool as this is, though, it is not foolproof due to construction idiosyncrasies in some homes.

Should the sensor fail,...

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Whether you’re taking on frequent DIY projects or simply looking to hang art, shelves or mirrors, a reliable stud finder is an essential part of your toolbox. Stud finders take the guesswork and measurements out of finding steady spots to anchor nails and screws, saving you a lot of time and effort (not to mention holes in your walls). We looked at both magnet-based and electronic stud finders to find the most dependable and useful models for a wide variety of wall and stud types, from lath and plaster construction to homes with metal studs. Read more about our methodology.

KEY CONSIDERATIONS

Magnetic vs. Electronic

The foremost consideration when choosing a stud finder is whether to purchase a model that uses magnets or electronic density detection to find studs. Generally, magnetic stud finders cost less than electronic models, but don’t offer added features like the ability to detect wiring or pipes within walls. Some electronic...

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Stud Sensors

Anyway I received Email form Tom Cicatelli. He said he had a been experimenting with an electronic stud sensor, and thought it would be useful for robots. He explained the stud sensor as a device that you slid it against a wall, and LEDs displays the relative density of the wall. I quickly went down to the local hardware store and purchased a hand held stud sensor from Zircon for only $11.99.

I had the stud sensor taken apart as soon as I was home. Inside I found a small circuit board, with one IC and a handful of resistors, capacitors and LEDS. The most interesting part was the three flat copper panels on the circuit borad. This was the sensor. Activating the device, the circuit calibrates itself to the surrounding area. If any object moves toward the sensor, its capacitance changes, and the LEDs display the change. The stud sensor can be adjusted and I found that I could sense my hand from several inches away. The display changes as I moved my...

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A stud sensor can be purchased for as little as $10.00 (US), so why would anyone try to use their Linux computer to look inside walls for power cables, nails, rebar, studs or anything else?

The CanDetect Project came into existence as a side effect of working on a more difficult problem, one where $10.00 of equipment wasn't going to get the job done. Short for Corroding Aircraft Non Destructive Evaluation using software Tools and an Eddy Current Tester, CanDetect aims to provide AMTs (aviation maintenance technicians) with an inexpensive means of performing corrosion inspections on aircrafts. CanDetect seeks to eliminate the expense of specialized computers, external amplifiers, modulators and power supplies, yet still allows an AMT to find tiny defects in metals buried under paint and even under other metals.

Our approach consists of software that can run on any Linux-supported platform and an inspection probe designed to be plugged directly in to the connectors for...

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Franklin Sensors stud finders sense more deeply than conventional stud finders in both ideal and real-world conditions.

Walls are full of inconsistencies. They aren’t perfectly straight, sheetrock sometimes contains bubbles, paint is applied in different thicknesses and in many regions of the world, some form of texture is applied to the wall. Conventional stud finders can only be tuned to one type of condition and therefore are inconsistent in varying conditions. The Franklin Sensors Multi-Sense Technology allows our stud finders to read more deeply, not only in ideal conditions, but also in real-world conditions with inconsistencies and differing surface types and thicknesses.

Click on a link below to see detection depths for both ideal and real-world...

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Range Rover Remedies

Range Rover Classic Remedies:
Common Mechanical & Electrical Problems and Fixes


Introduction
ABS Sensors
Air Conditioning
Alternator
Battery Drain, Mysterious
Clonks (Drivetrain/Suspension)
Cooling System
Cruise Control
CV Joints and Axles
Distributor Rotor Stuck
Door Locks
EFI Light
Fog/Driving Light Wiring
Fuel Leak/Smell
Fuel Level Sender
Fuel Pump
Heated Seat Failures
Heater Core
Heater/Vent/AC Fan Switch
Heater Fan Resistor Pack
Hood Support Bracket Grommet
Idle Air Bypass Valve
Ignition System
Mass Air Flow (MAF) Sensor Dirty
Misfiring
Muffler & Cat Rattles
Neutral Safety Switch
Oil Leaks
Oil Level/Pressure Light On or Flashing
Power Steering Box
Radio Code Problems
Rotor Arm Stuck
Rust
Seat Switches
Sensor Failures:
ABS, Coolant...

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