I'am a bit nervous after hitting a power cable five years ago I must admit.Basically get me over and anywhere I tend to drill you can virtually guarantee a gas pipe.
To date I've gone through 8or 9. Maybe more, I've lost count.
Oh yes, I've got one of those in the attic I'll dig it out.
i have a bosch one. it's pretty fair accurate, tends to err on the side of caution. once found a metal washer that had been plastered in about 70 years ago.