AJB Temple wrote:Thanks, I get it now.
I don't have a receiver and having looked they are expensive.
This laser is going to be sold and I will replace with a green one perhaps for my next job, but this will do for now. I find them very useful but it needs to be visible outdoors without me going on the night shift.
Steve is right Adrian although they aren't the same as a normal laser, still class 1 laser but doesn't emit a light that's visible and will work only with the receiver. You set up the laser which won't rotate unless levelled to the built in bubble, set the receiver to whatever height on the staff you need so if say a wall, rest the bottom of the staff on it and slide the receiver until you get a solid tone instead of beeps, lock the receiver and it's good to go anywhere within range.
Much more useful than the type that emits a red line, I use mine mostly with a calibrated alloy staff though many times have clamped it to a bit of slaters lath, laser on a tripod but also used at height on a shelf or top of blockwork, you can use the top of the staff e.g.I used it to exactly level suspended ceilings. I've used it to level foundations, roofs , patios ( you can get the fall exact), tiling you name it.
This is mine, I bought it s/h from a college who were upgrading to total station equipment, that was the best part of 20 years ago and it was last professionally calibrated in 1999 though I regularly check it for accuracy.
It's been bashed around as you can see from the cracked case now repaired and so far it's been bombproof, original rechargeble battery still holds charge it's one of the best tools I ever invested it.