The Trueplumb 600 is a 600 mm aluminium level with three milled acrylic vials and a backlit digital readout. It holds 0.3 mm/m accuracy in normal and inverted positions, so it reads as true against a ceiling joist as it does on a floor screed.
Every level is checked on a grade 00 granite surface plate at 20 °C before it leaves the bench. The certificate in the case lists the measured error of each vial, signed by the person who checked it. If it ever drifts past spec, we recalibrate it for free.
“I hung forty wall cabinets in a Victorian kitchen where nothing was square. The readout never drifted once.”