Product Phase-out

Bosch no longer produces the GLM10 laser measure and has replaced it with the GLM20 backlit product. We introduced the backlit version in December, 2018 as an upgrade option at a price increase of $20. In mid-2019 we reduced the price of both units by $20. Since we can no longer source the GLM10, the non-backlit LRM has been discontinued.

Battery Replacement

The start of the curling, it is a good time to replace the batteries in your units.

We have become aware that some older Bosch GLM15 lasers with weak batteries may not operate correctly.

There is a low battery icon built into the display; however, if it is ignored, the battery voltage can drop to a level where the unit does not operate correctly. This may result in an erratic display or incorrect operation of the unit. If this happens, replace the batteries.

We have reported this issue to Bosch and it has been corrected in the latest devices, which simply turn off (or won't turn on) when battery voltage drops below the lower threshold. If this happens with your unit, replace the batteries.

Like other battery powered devices that are used intermittently, having a battery replacement protocol is the best way to assure reliable performance. Replacing the batteries once a year can stave-off a lot of problems.

Auto-Adjust Pin

This new development from Curling Innovations Canada incorporates a spring-loaded pin that pushes down into the measuring location (Tee or other hole in the ice) when the LRM is positioned for a measurement. The photo below illustrates this device. Unlike the tapered set screw that has been standard with all LRMs until now, no operator adjustment is required.

The drop pin assembly includes a metal housing with a spring that pushes the pin down through the base. When placed over the Tee, the weight of the LRM compresses the spring, such that the pin seats neatly into the hole in the ice without lifting the base of the LRM off the ice. This keeps the laser beam parallel to the ice surface so the beam will strike all rocks at the same height regardless of their distance from the measuring point.

The advantage of the Auto-Adjust Pin is most apparent when there are sheet to sheet depth variations in the metal Tee inserts; there is no need to adjust a set screw. This is exemplified in the case of measuring LSD using the triangulation method where switching between holes drilled in the ice at the four-foot ring and the Tee often occurs. A detailed description of this LSD measurement method can be found in the World Curling Federation Rules of Curling, September 2019, Rule 8(c)