How long I have to be without a measuring device when sendind it to service?

Typically, the Sparklike CARE™ operation is scheduled and it will take about two to three weeks excluding shipping times. For on demand, the lead time for handheld is up to 5 weeks and in Laser it is up to six weeks. If repair needs are noticed, the lead time naturally prolongs.
You can also have a rental device for this time. Check here to rent a device