- Variable area Flowmeter for Low GAS and Liquid flows Range: 0,1 l/h … 1000 l/h H2O 1Nl/h … 30 Nm3/h air Accuracy: 2100 model ±3,5% f.s. 2150 model ±3% f.s. 2300/2340 models ±1,6% f.s. Connections: 2100/2150/2300 models 1/4 BSP, NPT 2340 model 1/2 or 3/4 M BSP, NPT Materials: Flow tube: borosilicate glass Wetted parts: EN 1.4404 (SS 316L) Float: EN 1.4404 (SS 316L), glass, plastic, ceramic