Abstract: The disclosure describes various embodiments that utilize optical sensor to characterize attributes of a liquid. Some sensor configuration continue to function properly even after scaling begins to reduce the visibility of photochemical sensors that measure the attributes of the liquid. This allows significantly longer continuous operating periods and lower maintenance costs.

Abstract: A gasifier configured to receive biomass, including: a pyroreactor defining a first end, a second end, and an interior lumen, the first end defining a biomass inlet, the second end defining a pyroreactor outlet; a reduction basket arranged proximal the pyroreactor outlet, the reduction basket including a closed end and a basket opening opposing the closed end; a set of air manifolds fluidly connected to the interior lumen of the pyroreactor through a set of air inlets arranged between the first and second ends, proximal the second end; and a gasifier housing enclosing the pyroreactor, reduction basket, and set of air manifolds within a housing lumen.