Wood & metal sensors are used to detect wood studs & metal, particularly wiring, primarily behind plasterboard, but also in brickwork. Click here to see all our laser & measuring tools

Product EAN: 3165140560108

Manufacturer's description

Bosch GMS120 Professional 9 Detector - The most reliable multi-detector in its class

Maximum reliability: most objects are found and application errors are avoided due to the automatic calibration
Reliable detection even of deep-lying objects - up to a depth of 12 cm
Even more reliable detection of objects due to three-colour LED luminous ring

Reliable detection even of deep-lying objects - up to a depth of 12 cm

Manufacturer's technical spec

Bosch GMS120 Professional 9 Detector - The most reliable multi-detector in its class

Detectable materials: Ferrous metals, non-ferrous metals, wooden studs, live cables
Max. detection depth: 120 mm
Detection depth, steel, max.: 120 mm
Detection depth, copper, max.: 80 mm
Detection depth of live cables, max.: 50 mm
Detection depth of wooden substructures, max.: 38 mm
Automatic deactivation, approx.: 5 min
Power supply: 1 x 9 V 6LR61
Weight, approx.: 0,27 kg
Length: 200 mm
Width: 85 mm
Height: 32 mm
Dust and splash protection: IP 54

Warranty, delivery & returns

Bosch Blue - Professional

1 year warranty can be extended to 3 years (2 years for Batteries/Chargers) by registering the tool online within 30 days of purchase. For full information click here
To register your tool for extended warranty click here
Warranty claims: Call Bosch direct to arrange warranty repair Tel: 0344 736 0109 or use the online collection service

Bosch Garden Tools

2 year warranty - for full information click here
Sign up for free 3 year warranty - click here
Warranty claims: Call Bosch direct to arrange warranty repair Tel: 0344 736 0109 or use the online collection service

Bosch Green - DIY

2 year warranty - for full information click here
Sign up for free 3 year warranty - click here
Warranty claims: Call Bosch direct to arrange warranty repair Tel: 0344 736 0109 or use the online collection service

Delivery info

Order by 5pm for free next working day delivery. There are additional delivery options on the one page check out including timed morning and weekend deliveries
We use a premium carrier that notifies you of a one hour timed delivery slot and sends text updates
In a very limited number of UK locations (Scottish Islands, Scottish Highlands, Isle of Man, Channel Isles, Scilly Isles), we will try our hardest, but the delivery service is likely to be an extra day - it’s still free though!

Returns info

If you change your mind within 30 days of buying a tool, not a problem (assuming the tool has not been used and is in its original packaging) - call us on 0333 004 3000 or email us at [email protected] and we’ll contact you to arrange collection. Once the tool is received back, we will refund the cost of the tool less a £6 collection charge.
If the tool is faulty within 30 days of buying it, we will arrange for its collection at no cost to you and supply a replacement.
If the tool is faulty after 30 days of buying it, and before the expiry of the manufacturer’s warranty, we will guide you through the manufacturer’s warranty process.

Product reviews

BOSCH GMS 120

4.5 / 5 (44)

colin banks one year ago

Great product

Nicholas Tatam one year ago

Whilst I was looking for a screw I thought was there it detected a nail deeper down that I did not expect but was there.

Christine one year ago

Easy-to-use tool. Accurate reading where pipes/electrics are.

James Henderson one year ago

Joiner to trade so far so good Jimmy the joiner

Ranjit Dhillon one year ago

Easy to use

Andy W one year ago

Easy to use

SueBo one year ago

Good build quality and easy to use.

Ann Constance one year ago

Excellent product

Robert white 2 years ago

It’s Bosch I would not expect anything less than a good product.

Thutchin 2 years ago

Great product - performs very well

JOHN J WILSON 2 years ago

Great piece of kit

JK 2 years ago

Nice stuff

mat 2 years ago

GREAT GREAT GREAT GREAT GREAT

Paul Graham 2 years ago

Yet to try but arrived quickly and well packaged, looks well made and could take a few scraps and bumps

Brian 3 years ago

Simple and easy to use providing you understand what the unit is scanning for. For example it wont detect a live power cable if its covered by a metal casing. So detect for metal instead. Ignore some of the test sites which are unrepresentative of the product. If its flashing red to indicate power in the wall everywhere just put your other hand on the wall to discharge the static build up, then it will operate correctly. Always scan three times for an accurate detection. A good product which will save a lot of hassle and worry.

simon 3 years ago

Just seemed to beep all the time....rerurned....maybe because of internet signal...i don't know...

F W 3 years ago

Excellent bit of kit. Gives more confidence that when drilling into internal walls etc. you're less likely to drill into something you should'nt. Easy to use. Best price found at Howe Tools & fast delivery, well pleased.

Richard Barron 3 years ago

Easy to use and gives a good readout - easy to understand

Allen J 3 years ago

Very easy to use with both audible and visible alerts to know when you are passing the device over a material it detects allowing you to get pretty precise location readings. It's great that it can not only detect live cables but also building materials such as metals and wooden stud. It's nice to know that it has automatic calibration. Comes complete with snug carry case and strap.

GAB Audio Engineers 3 years ago

Well featured unit, works well.

Mr Alastair Learmonth 3 years ago

Better than most for finding studs and mains cables but sometimes gives you a false reading.

Mr David Jameson 3 years ago

Not used it in working environment yet. But just practicing it performed well.

Fred Dove 3 years ago

Top quality product. I would highly recommend this Bosch GMS 120 unit.

Husbandofstinky 3 years ago

Had a play with it and seemed to work ok. Not had a proper test drive yet

Mr Michael Penry and Mrs Kathryn Penry 3 years ago

Seems to be doing exactly what it says on the box.

Christopher Fayle 3 years ago

A first sight, it seems over sensitive and I am getting false positives for live wiring. But I will watch the video again on the Bosch web site and give it another go.

Bayliss 3 years ago

Slightly disappointed with the accuracy of the instrument as it appears to be confused by more that one element in the vicinity of the detection area being analysed.

Paul Walker 3 years ago

Takes considerable trial and error to get the technique in operating the detector to produce accurate results

David Dodds 3 years ago

Does what is says, perfect, I can now drill without having to cross my fingers.

Ben Robey 3 years ago

the equipment does what it should and has helped me do the job it was intended for.

Shajid Ullah 3 years ago

It a great product and excellent proformance.

Mr Wilkinson 3 years ago

I have had many stud and metal detectors but this is the best. Good depth of search and no false alarms.You can find and centre the object under search.

Robert Atkins 3 years ago

Still getting to know the product, but looks promising. Better than my previous detector.

Miriam 3 years ago

Scanning a wall for wires, battens etc can be tricky. This tool would appear to give the best chance of success. I have tried others, and not been impressed.

Unhappy Customer 3 years ago

Easy to use and does what it says on the tin

Paul Hardy 3 years ago

Simple to use, no problems up to now, seems to find everything even stuff me old cheap one didn't.

eric grant 4 years ago

Performs better than my other detector. Pin points nails in rafters accurately.

Dhirijlal Shah 4 years ago

Very acceptable Of course goes by the name of Bosch

Livio Ghedin 4 years ago

I took it out of the box, installed supplied battery, surfaced it to the wall and it worked immediately ... so logical I did not need to read the instructions ...

Adrian 4 years ago

Invaluable. Not perfect but a lot better than my previous one and certainly gives you piece of mind when screwing down chipboard floors prior to laying new floor on top.

Boozybuff 4 years ago

Not used it a lot, at he moment, bought it after I drilled through a cable, should have bought it before I drilled.

Parnosa Ltd 4 years ago

Far too many false readings, fails to give accurate reading of studs through half inch OSB.

trevor corby 4 years ago

Just seems to detect items that are not there.

Stephen Spencely 5 years ago

Very good product, easy to use.

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