Stanley Works of New Britain, Conn., has recalled 18,500 Stanley Stud Sensor 200 and Stanley FatMax Stud Sensor 400 because they may fail to detect wires behind a wall, posing a shock hazard, Health Canada says.

There are no reports of injuries.

The two machines are made of black plastic and have a wide yellow stripe down the centre. The words Stanley or FatMax are printed on the front, and the model numbers 77-720 and 77-730 are in a slide-out reference guide on the base of the sensor's handle.

A date code can be found printed on the inside of the battery cover. Products with a date code that begin with the letter "R" are not included in the recall.

The products were sold from November 2007 to January 2009 at Wal-Mart, Rona and Home Depot retail stores across Canada.

Consumers should stop using the devices and contact Stanley at 1-800-263-6292 between 8 a.m. and 5 p.m. ET Monday to Friday for a free replacement.

Recall notice

Company website