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Bosch GMS 120 Cable, Metal & Wood Digital Sensor
Wall Wire Detectors

Bosch GMS 120 Cable, Metal & Wood Digital Sensor

Multi-detector with three detection modes for different applications: Drywall mode, metal mode, live wire mode. Detection of objects up to 12 cm depth.

Multi-detector with three detection modes for different applications: Drywall mode, metal mode, live wire mode. Detection of objects up to 12 cm depth.

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Product report

Description

Description

Multi-detector with three detection modes for different applications: Drywall mode, metal mode, live wire mode. Detection of objects up to 12 cm depth. Precise millimeter indication of the object's center with the "Center Finder" detection scale and material properties indication. Detection of objects via a three-color LED light ring.


Features

  • Detectable materials: Ferrous metals, non-ferrous metals, wooden covered structures, live conductors
  • Maximum detection depth: 120 mm
  • Steel detection depth, max.: 120 mm
  • Copper detection depth, max.: 80 mm
  • Live conductors detection depth, max.: 50 mm
  • Wooden covered structures detection depth, max.: 38 mm
  • Automatic shutdown, approx. 5 min
  • Power supply 1 battery 9 V 6LR61
  • Weight, approx. 0.27 kg
  • Length 200 mm
  • Width 85 mm
  • Height 32 mm
  • Dust and moisture protection IP 54

Included

  • 1 battery 9 V-6LR61 (block)
  • Carrying strap
  • Protective bag.

Manufacturer

Manufacturer Details

Warnings & Safety Information
See full description

Specifications

Specifications

Digital
Yes
Detectable Materials
Cables, Metal, Wood

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

See all specifications

Reviews (25)

Reviews

3.5
25
3.5
Review this product
  1. 8
  2. 9
  3. 1
  4. 3
  5. 4
Review this product

MichG
5
11 out of 12 members found this review helpful
MichG

Verified purchase

For this price, I am evaluating only one of its features, which is very useful to me. Yes, it is 100% not accurate but with a new battery you can find the following very important things for buildings: 1. Distance of connectors in a column or beam, and even if you break a corner you can see the cross-section. 2. Number of longitudinal reinforcement bars, e.g. in a column (here with reservations because you go deeper and often miss some reinforcement elements or get confused if some are very close together). The bars must have little overlap and be few in number, but who can say they haven't encountered countless houses with three rods per side or even one at each corner, old constructions? So here too, in many cases, it is useful. 3. Distribution in buildings. It helps you find structural elements like columns and beams embedded in walls.
Yes, it is not a specialized instrument for this job but for this money you always have it with you, it is light and you are not afraid of it getting damaged. You immediately get an idea of what is in front of you.
Regarding what they say about drilling with a bit and not finding rods, I have done it and had successful results (maybe there is a different production series?). For better accuracy, it requires a bit of careful handling by watching the indicator, which is the point where it shows an increase. I have not used it for electricity.

Translated from Greek ·
Did you find this review helpful?

alkaiosi
1
12 out of 14 members found this review helpful
alkaiosi

Verified purchase

Unreliable tool. Above all, with the flow of electricity, it showed that there was no power. When I removed the cover, it showed that there is power. In another case, it showed that the power cable runs right below the beam, while it was actually 10 centimeters below the beam. It only detects the iron of the beams at a short distance, but not in the correct position. I drilled with a drill bit in many points where it showed that there is iron and I couldn't find it. Good for playing, not for work.

Translated from Greek ·
Did you find this review helpful?
  • Dimitrios_Karagiannis
    1
    6 out of 6 members found this review helpful
    Dimitrios_Karagiannis
    Store representative

    Verified purchase

    A very disappointing detector regarding electrical wires (it doesn't beep even above the socket or the switch), it easily finds metal inside poles, I haven't tested it for wood. I bought a Chinese one from Aliexpress (KAIWEETS-KES 01) and it finds the wires inside the wall.

    Translated from Greek ·
    Did you find this review helpful?
  • redlineGR
    5
    1 out of 1 members found this review helpful
    redlineGR

    Verified purchase

    For the cost, very good, I used it to locate wires which it detected with relative accuracy, even when there was no current flowing.

    Translated from Greek ·
    Did you find this review helpful?
  • kakonenias
    4
    9 out of 9 members found this review helpful
    kakonenias

    Verified purchase

    Pretty good accuracy, but not flawless. A bit pricey for what it offers, but I wouldn't change it under any circumstances.

    Translated from Greek ·
    Did you find this review helpful?
  • atsimas
    4
    7 out of 8 members found this review helpful
    atsimas

    Verified purchase

    It will help you avoid nails in the wall, but it will struggle in the corners. Maybe I'm not using it correctly, I don't know. Anyway, I don't know of anything better for this price.

    Translated from Greek ·
    Did you find this review helpful?
  • panos855
    2
    18 out of 20 members found this review helpful
    panos855

    Unfortunately, I wasted my money! It can hardly catch cables at all! Not even when they are loaded. Don't buy it! I will check if it's still under warranty to return it.

    update: The problem is severe when the cable is deep. It finds them more easily on the surface.

    Translated from Greek ·
    Did you find this review helpful?
  • giannis_ios
    1
    11 out of 14 members found this review helpful
    giannis_ios

    It is not reliable, it cannot accurately detect power cables even at a depth of 2-3 cm from the external side of the walls

    Translated from Greek ·
    Did you find this review helpful?
  • Themis_Chatzigianellis
    5
    2 out of 7 members found this review helpful
    Themis_Chatzigianellis

    Verified purchase

    Very good and useful tool. I haven't worked with it much, but so far I am very satisfied.

    Translated from Greek ·
    Did you find this review helpful?
  • panostsiko87
    4
    3 out of 5 members found this review helpful
    panostsiko87

    Good, it has helped me many times for cable detection, it makes some mistakes but in combination with another one I have from a different company, which is more affordable, I find results overall very good, but if it was more affordable it would be perfect

    Translated from Greek ·
    Did you find this review helpful?
  • kostas_livanios
    4
    5 out of 6 members found this review helpful
    kostas_livanios

    Verified purchase

    100% it is not expensive (although it is much ahead of other similar ones in its category), but it is in a very high percentage and if you find it around €80 or lower in some offer, get it.

    Translated from Greek ·
    Did you find this review helpful?
  • Arch1t3kt
    2
    12 out of 22 members found this review helpful
    Arch1t3kt

    Easy and convenient product to use and read the indications. It is quite good at finding metallic elements on walls, but only if they are isolated. In the case of wanting to measure on reinforced concrete or beams, it gets confused and often gives incorrect readings, making it practically useless. Its effectiveness on drywall was good, but keep in mind that these devices need to detect current flowing through the cables to find them. If there is no current, they won't detect anything.
    It has good features and if it cost 15-20 euros, it would be okay. At 70+, it is completely impractical and I cannot recommend it to anyone.

    Translated from Greek ·
    Did you find this review helpful?
  • giwrgos_79
    4
    4 out of 5 members found this review helpful
    giwrgos_79

    It finds cables under voltage and metals with fairly accuracy, but it deviates about 3 cm parallel to the current conductor. Good build quality.

    TEST/REVIEW:
    https://youtu.be/taBP7nCDDc4

    Translated from Greek ·
    Did you find this review helpful?
  • jimmytsapy
    3
    5 out of 6 members found this review helpful
    jimmytsapy

    Verified purchase

    In metal, with calibration, it performs decently, although with some minor flaws.
    It does not reach a great depth.
    In the electrical conductor, it performs poorly. It only achieves accuracy when parallel to the conductor. Accuracy across the conductor is as if it has the eye 2-3 points higher. Caution!

    Translated from Greek ·
    Did you find this review helpful?
  • metapolis
    5
    3 out of 7 members found this review helpful
    metapolis

    Extremely useful tool. Although it is somewhat difficult to use initially, it proves to be very reliable once you learn it.

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    alemara1971

    Verified purchase

    Excellent

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    George Mavridis

    Verified purchase

    Extremely reliable. It is worth the money you spend to buy it

    Translated from Greek ·
    Did you find this review helpful?
  • 4
    VASILIS_Α

    Verified purchase

    Wherever I tried it, it does what it says, I will come back with a long-term review

    Translated from Greek ·
    Did you find this review helpful?
  • 4
    4 out of 5 members found this review helpful
    Ioakeim83

    Verified purchase

    Okay for its price
    You can't really call it reliable, but it gives a general idea most of the time...

    Translated from Greek ·
    Did you find this review helpful?
  • 1
    4 out of 8 members found this review helpful
    Kostas_Polychronos

    Do not waste your money!!!
    Useless and I would say even dangerous!

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    Dimitris_Kazantzis_1973

    Verified purchase

  • 4
    CHristos_Gialouris8007

    Verified purchase

  • 4
    thodoris_terz

    Verified purchase

  • 2
    ALEXANTROS_AVTZIS

    Verified purchase

  • Dimitrios_Karagiannis
    1
    Dimitrios_Karagiannis

    A very disappointing detector regarding electrical wires (it doesn't beep even above the socket or the switch), it easily finds metal inside poles, I haven't tested it for wood. I bought a Chinese one from Aliexpress (KAIWEETS-KES 01) and it finds the wires inside the wall.

    Translated from Greek ·
    6
  • redlineGR
    5
    redlineGR

    For the cost, very good, I used it to locate wires which it detected with relative accuracy, even when there was no current flowing.

    Translated from Greek ·
    1
  • kakonenias
    4
    kakonenias

    Pretty good accuracy, but not flawless. A bit pricey for what it offers, but I wouldn't change it under any circumstances.

    Translated from Greek ·
    9
  • atsimas
    4
    atsimas

    It will help you avoid nails in the wall, but it will struggle in the corners. Maybe I'm not using it correctly, I don't know. Anyway, I don't know of anything better for this price.

    Translated from Greek ·
    7
  • panos855
    2
    panos855

    Unfortunately, I wasted my money! It can hardly catch cables at all! Not even when they are loaded. Don't buy it! I will check if it's still under warranty to return it.

    update: The problem is severe when the cable is deep. It finds them more easily on the surface.

    Translated from Greek ·
    18
  • See all

Description & Specifications

Multi-detector with three detection modes for different applications: Drywall mode, metal mode, live wire mode. Detection of objects up to 12 cm depth. Precise millimeter indication of the object's center with the "Center Finder" detection scale and material properties indication. Detection of objects via a three-color LED light ring.


Features

  • Detectable materials: Ferrous metals, non-ferrous metals, wooden covered structures, live conductors
  • Maximum detection depth: 120 mm
  • Steel detection depth, max.: 120 mm
  • Copper detection depth, max.: 80 mm
  • Live conductors detection depth, max.: 50 mm
  • Wooden covered structures detection depth, max.: 38 mm
  • Automatic shutdown, approx. 5 min
  • Power supply 1 battery 9 V 6LR61
  • Weight, approx. 0.27 kg
  • Length 200 mm
  • Width 85 mm
  • Height 32 mm
  • Dust and moisture protection IP 54

Included

  • 1 battery 9 V-6LR61 (block)
  • Carrying strap
  • Protective bag.

Manufacturer

Manufacturer Details

Warnings & Safety Information
Digital
Yes
Detectable Materials
Cables, Metal, Wood

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

Reviews (25)

3.5
25
3.5
Review this product
  1. 8
  2. 9
  3. 1
  4. 3
  5. 4
Review this product

MichG
5
11 out of 12 members found this review helpful
MichG

Verified purchase

For this price, I am evaluating only one of its features, which is very useful to me. Yes, it is 100% not accurate but with a new battery you can find the following very important things for buildings: 1. Distance of connectors in a column or beam, and even if you break a corner you can see the cross-section. 2. Number of longitudinal reinforcement bars, e.g. in a column (here with reservations because you go deeper and often miss some reinforcement elements or get confused if some are very close together). The bars must have little overlap and be few in number, but who can say they haven't encountered countless houses with three rods per side or even one at each corner, old constructions? So here too, in many cases, it is useful. 3. Distribution in buildings. It helps you find structural elements like columns and beams embedded in walls.
Yes, it is not a specialized instrument for this job but for this money you always have it with you, it is light and you are not afraid of it getting damaged. You immediately get an idea of what is in front of you.
Regarding what they say about drilling with a bit and not finding rods, I have done it and had successful results (maybe there is a different production series?). For better accuracy, it requires a bit of careful handling by watching the indicator, which is the point where it shows an increase. I have not used it for electricity.

Translated from Greek ·
Did you find this review helpful?

alkaiosi
1
12 out of 14 members found this review helpful
alkaiosi

Verified purchase

Unreliable tool. Above all, with the flow of electricity, it showed that there was no power. When I removed the cover, it showed that there is power. In another case, it showed that the power cable runs right below the beam, while it was actually 10 centimeters below the beam. It only detects the iron of the beams at a short distance, but not in the correct position. I drilled with a drill bit in many points where it showed that there is iron and I couldn't find it. Good for playing, not for work.

Translated from Greek ·
Did you find this review helpful?
  • Dimitrios_Karagiannis
    1
    6 out of 6 members found this review helpful
    Dimitrios_Karagiannis
    Store representative

    Verified purchase

    A very disappointing detector regarding electrical wires (it doesn't beep even above the socket or the switch), it easily finds metal inside poles, I haven't tested it for wood. I bought a Chinese one from Aliexpress (KAIWEETS-KES 01) and it finds the wires inside the wall.

    Translated from Greek ·
    Did you find this review helpful?
  • redlineGR
    5
    1 out of 1 members found this review helpful
    redlineGR

    Verified purchase

    For the cost, very good, I used it to locate wires which it detected with relative accuracy, even when there was no current flowing.

    Translated from Greek ·
    Did you find this review helpful?
  • kakonenias
    4
    9 out of 9 members found this review helpful
    kakonenias

    Verified purchase

    Pretty good accuracy, but not flawless. A bit pricey for what it offers, but I wouldn't change it under any circumstances.

    Translated from Greek ·
    Did you find this review helpful?
  • atsimas
    4
    7 out of 8 members found this review helpful
    atsimas

    Verified purchase

    It will help you avoid nails in the wall, but it will struggle in the corners. Maybe I'm not using it correctly, I don't know. Anyway, I don't know of anything better for this price.

    Translated from Greek ·
    Did you find this review helpful?
  • panos855
    2
    18 out of 20 members found this review helpful
    panos855

    Unfortunately, I wasted my money! It can hardly catch cables at all! Not even when they are loaded. Don't buy it! I will check if it's still under warranty to return it.

    update: The problem is severe when the cable is deep. It finds them more easily on the surface.

    Translated from Greek ·
    Did you find this review helpful?
  • giannis_ios
    1
    11 out of 14 members found this review helpful
    giannis_ios

    It is not reliable, it cannot accurately detect power cables even at a depth of 2-3 cm from the external side of the walls

    Translated from Greek ·
    Did you find this review helpful?
  • Themis_Chatzigianellis
    5
    2 out of 7 members found this review helpful
    Themis_Chatzigianellis

    Verified purchase

    Very good and useful tool. I haven't worked with it much, but so far I am very satisfied.

    Translated from Greek ·
    Did you find this review helpful?
  • panostsiko87
    4
    3 out of 5 members found this review helpful
    panostsiko87

    Good, it has helped me many times for cable detection, it makes some mistakes but in combination with another one I have from a different company, which is more affordable, I find results overall very good, but if it was more affordable it would be perfect

    Translated from Greek ·
    Did you find this review helpful?
  • kostas_livanios
    4
    5 out of 6 members found this review helpful
    kostas_livanios

    Verified purchase

    100% it is not expensive (although it is much ahead of other similar ones in its category), but it is in a very high percentage and if you find it around €80 or lower in some offer, get it.

    Translated from Greek ·
    Did you find this review helpful?
  • Arch1t3kt
    2
    12 out of 22 members found this review helpful
    Arch1t3kt

    Easy and convenient product to use and read the indications. It is quite good at finding metallic elements on walls, but only if they are isolated. In the case of wanting to measure on reinforced concrete or beams, it gets confused and often gives incorrect readings, making it practically useless. Its effectiveness on drywall was good, but keep in mind that these devices need to detect current flowing through the cables to find them. If there is no current, they won't detect anything.
    It has good features and if it cost 15-20 euros, it would be okay. At 70+, it is completely impractical and I cannot recommend it to anyone.

    Translated from Greek ·
    Did you find this review helpful?
  • giwrgos_79
    4
    4 out of 5 members found this review helpful
    giwrgos_79

    It finds cables under voltage and metals with fairly accuracy, but it deviates about 3 cm parallel to the current conductor. Good build quality.

    TEST/REVIEW:
    https://youtu.be/taBP7nCDDc4

    Translated from Greek ·
    Did you find this review helpful?
  • jimmytsapy
    3
    5 out of 6 members found this review helpful
    jimmytsapy

    Verified purchase

    In metal, with calibration, it performs decently, although with some minor flaws.
    It does not reach a great depth.
    In the electrical conductor, it performs poorly. It only achieves accuracy when parallel to the conductor. Accuracy across the conductor is as if it has the eye 2-3 points higher. Caution!

    Translated from Greek ·
    Did you find this review helpful?
  • metapolis
    5
    3 out of 7 members found this review helpful
    metapolis

    Extremely useful tool. Although it is somewhat difficult to use initially, it proves to be very reliable once you learn it.

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    alemara1971

    Verified purchase

    Excellent

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    George Mavridis

    Verified purchase

    Extremely reliable. It is worth the money you spend to buy it

    Translated from Greek ·
    Did you find this review helpful?
  • 4
    VASILIS_Α

    Verified purchase

    Wherever I tried it, it does what it says, I will come back with a long-term review

    Translated from Greek ·
    Did you find this review helpful?
  • 4
    4 out of 5 members found this review helpful
    Ioakeim83

    Verified purchase

    Okay for its price
    You can't really call it reliable, but it gives a general idea most of the time...

    Translated from Greek ·
    Did you find this review helpful?
  • 1
    4 out of 8 members found this review helpful
    Kostas_Polychronos

    Do not waste your money!!!
    Useless and I would say even dangerous!

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    Dimitris_Kazantzis_1973

    Verified purchase

  • 4
    CHristos_Gialouris8007

    Verified purchase

  • 4
    thodoris_terz

    Verified purchase

  • 2
    ALEXANTROS_AVTZIS

    Verified purchase

  • Dimitrios_Karagiannis
    1
    Dimitrios_Karagiannis

    A very disappointing detector regarding electrical wires (it doesn't beep even above the socket or the switch), it easily finds metal inside poles, I haven't tested it for wood. I bought a Chinese one from Aliexpress (KAIWEETS-KES 01) and it finds the wires inside the wall.

    Translated from Greek ·
    6
  • redlineGR
    5
    redlineGR

    For the cost, very good, I used it to locate wires which it detected with relative accuracy, even when there was no current flowing.

    Translated from Greek ·
    1
  • kakonenias
    4
    kakonenias

    Pretty good accuracy, but not flawless. A bit pricey for what it offers, but I wouldn't change it under any circumstances.

    Translated from Greek ·
    9
  • atsimas
    4
    atsimas

    It will help you avoid nails in the wall, but it will struggle in the corners. Maybe I'm not using it correctly, I don't know. Anyway, I don't know of anything better for this price.

    Translated from Greek ·
    7
  • panos855
    2
    panos855

    Unfortunately, I wasted my money! It can hardly catch cables at all! Not even when they are loaded. Don't buy it! I will check if it's still under warranty to return it.

    update: The problem is severe when the cable is deep. It finds them more easily on the surface.

    Translated from Greek ·
    18
  • See all