Hello.

I have personally encountered this, and our clients also frequently report that working in bright sunlight causes issues with the tachometer. The photosensitive element gets "blinded" by the light, making it impossible to take readings.

We usually have to improvise to create shade using whatever is at hand. Sometimes you have to ask a colleague to block the sun with a shovel, other times you end up taping cardboard directly to the equipment. It’s inconvenient and takes up quite a bit of time.

Recently, my colleague decided to solve this issue properly and designed a specific 3D-printed hood for the tachometer. It acts like a visor, cutting off excess light and protecting the sensor. We printed a few and tested them — the problem is gone.

I decided to share the download links for the models here (there are two versions). If you have access to a 3D printer, feel free to use them.

Download links:

Version 2: http://vibromera.eu/wp-content/ver2.stl

Version 3: http://vibromera.eu/wp-content/ver3.stl