Head-to-head · Best Stud Finders

Craftsman CMHT77633 vs Zircon StudSensor A100

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

Zircon StudSensor A100 comes out ahead by a clear margin (3.4 vs 3.9). The gap is mostly about Beginners seeking edge detection with alerts — read the strengths below before deciding.

Ranked #5 in Best Stud Finders

Craftsman CMHT77633

3.4

$9.59as of Jul 6

The CRAFTSMAN CMHT77633 3/4-in Depth Stud Finder is designed for detecting both wood and metal studs through drywall and surfaces covered in wallpaper or fabric. Reviewers noted its durability with a shock-resistant, water-resistant body and integrated AC detection. However, user feedback highlights significant reliability issues, with multiple reports of calibration failures and inconsistent performance after initial use. The product's limited lifetime warranty offers some protection, but many reviewers expressed disappointment with its functionality. This tool is best suited for users who need basic stud detection and can tolerate potential reliability concerns.

Strengths

— Works on wallpaper and fabric with depth range of ¾-in through drywall
— Locates stud edges of both wood and metal studs
— Shock-resistant and water-resistant body for durability

Watch-outs

— Frequent calibration issues reported by users
— Inconsistent sensing performance after initial use

$9.59 · Check Price on Amazon Full review →

Higher ratedRanked #4 in Best Stud Finders

Zircon StudSensor A100

3.9

$34.6as of Jul 6

The Zircon StudSensor™ A100 is an edge-locating stud finder designed for ease of use with dual scanning modes. Reviewers noted its ability to detect both wood and metal studs up to 1½ inches deep, along with its WireWarning® feature that alerts users to live electrical wiring. The device includes a SpotLite® pointer and LCD display for clear indication of stud edges. While praised for its functionality, some users may find the need for separate 9V batteries and its limitation on lath and plaster walls as drawbacks.

Strengths

— StudScan mode locates edges of wood and metal studs up to 3⁄4 in. (19 mm) deep
— DeepScan® Mode doubles scanning depth to locate edges up to 11⁄2 in. (38 mm) deep
— WireWarning® Detection indicates presence of live unshielded AC electrical wiring up to 2 in. (50 mm) deep

Watch-outs

— Requires 9V alkaline batteries (not included)
— Not recommended for use on lath and plaster

$34.6 · Check Price on Amazon Full review →

How they stack up

Craftsman CMHT77633

The Craftsman CMHT77633 offers shock and water resistance, which the C.H. Hanson 03040 and Klein Tools ESF150LL lack, but its frequent calibration issues and inconsistent performance make it inferior to the more reliable Zircon StudSensor A100 and Bosch GMS120-27. While it works on wallpaper and fabric, its reliability problems prevent it from matching the accuracy of the Franklin Sensors ProSensor M210.

Zircon StudSensor A100

The Zircon StudSensor A100's dual scanning modes and WireWarning® feature distinguish it from the Klein Tools ESF150LL and C.H. Hanson 03040, which lack such advanced detection capabilities. While the Franklin Sensors ProSensor M210 offers more sensors and the Bosch GMS120-27 detects more materials, the Zircon A100 provides a balance of depth detection and user-friendly alerts. However, it requires separate batteries and is limited on lath and plaster, unlike the battery-free C.H. Hanson 03040.

Specs side-by-side

Spec	Craftsman CMHT77633	Zircon StudSensor A100
Detection Depth	¾-in	Up to ¾ in. (19 mm)
Battery Type	9V	9V alkaline required (not included)
Sensors	stud sensor	13
Weight	0.233 lbs	4.80 oz. (136 g) without battery
Material	Plastic	Plastic
Features	3/4-in Depth	21

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