Neonates to adults, the entire series of time-tested Timeter® Classic Flowmeters demonstrates our unsurpassed knowledge of the needs of care providers and patients alike. You can see it in the accuracy. You can see it in the craftsmanship. You can see it in the performance, year after year. Every Timeter® Classic Flowmeter is hand-crafted and engineered to the highest standards of performance and accuracy. The front scale, silk-screened on the acrylic block, is checked for accuracy at critical points against a flowmeter reference standard. The silk-screened backscale on oxygen flowmeters is aligned mirror-perfect with the front. A renewable valve assembly allows you to make readjustments quickly with a slight turn of the valve stem.