Mass and Volumetric Flow Meters Displays Flow,Temp, Pressure in Mass Flow Unit Full Scale Ranges from 0.5 CCM to 1000 LPM Dynamic Display with 13 Gas Select: Air, A, CH4, CO, CO2, Ethane, H2, He, N2, N2O, Neon, O2, Propane RS-232 Communication Response Time of 10milliseconds Typical Low Pressure Drop of 25mbar or Better for 100 LPM or Less Turndown Ratio of 100:1 Typical Position Insensitive Push Button Tare Repeatability ±0.5% 300 Series Stainless Steel Standard on all Single Channel, Flowmeters 50(S) LPM and Under differential pressure across it. The restriction is designed so that the gas molecules are forced to move in parallel paths along the entire length of the passage; hence Laminar (streamline) flow is established for the entire range of operation of the device. Because of the LFE’s in the flow body, straight runs of pipe upstream and downstream are generally not The FMA-1600 and FVL-1600 Series flowmeters use two of the best-studied physical properties of gases to measure flow: Pressure and viscosity. Differential pressure measurement, across a laminar region, to achieve a turndown of 100:1 typical. Gas units are available with very wide range of measurement, starting at 500 microlitres per minute full scale to 1000 litres per minute full scale. Unique laminar flow elements, no moving parts and modern electronics provide an instrument that is rugged, affordable and accurate. The FMA-1600 series “NONTHERMAL” Mass FLowmeters use discrete differential pressure, absolute pressure, and temperature sensor measurements within the laminar flow region. The embedded microprocessor provides a software-based STP calculation for the user, compensated for pressure and temperature to standard conditions(1 atmosphere 25° C). The FMA1600 series addresses the limitations of thermal mass flow technologies, as there is no “Hot wire” drift. The unit has an adjustable response time starting from 10 ms. The FVL-1600 series volumetric gas flowmeters are ideal for applications venting to atmosphere or with little to no back- pressure. These units use discrete differential Pressure sensor measurements within the laminar flow region with an embedded microprocessor to provide flow measurements with an adjustable response time starting from 10 ms. The FMA-1600 and FVL-1600 series gas flow meters are based on the accurate measurement of volumetric flow. The volumetric flow rate is determined by creating a pressure drop across a unique internal restriction, known as a Laminar Flow Element (LFE), and measuring required. Unlike other flow measuring devices, in laminar flow meters the relationship between pressure drop and flow is linear. The underlying principle of operation of the flow meters is known as the Poiseuille Equation: Q = (P1-P2)ðr4/8hL (Equation 1) Where: Q = Volumetric Flow Rate P1 = Static pressure at the inlet FVL-1600 FMA-1600 £459 Basic Unit FMA-1611 shown larger than actual size P-4 P [email protected] +44 (0)161 777 6622

Laminar Flow Laminar Flow Cavity Plate Outlet Laminar Plate Spacer Spacer Outlet Outlet Laminar Plate Inlet Inlet Inlet Turbulent Flow Turbulent Flow Differential Pressure Sensor Laminar Flow Laminar Flow Laminar Flow *Very low flow devices may have special ports to reduce dead volume. Dimensions Flow Range Height Length Depth Port Size 20(S) LPM and under* 104mm 60mm 27mm 1/8"NPT(F) 50 (S) LPM 107mm 67mm 27mm 1/4"NPT(F) 100 (S) LPM 111mm 89mm 41mm 1/4"NPT(F) 250 to 1000 (S) LPM 133mm 89mm 41mm 1/2"NPT(F) LAMINAR FLOW ELEMENT P2 = Static pressure at the outlet r = Radius of the restriction h...

Model No. Price Model No. Price Connection Flow Range Mass Flow Meter Volumetric Flow Meter NPT(F) FMA-1601(*) £1040 FVL-1601(*) £875 1/8 0.5 SCCM FMA-1602(*) 955 FVL-1602(*) 790 1/8 1 SCCM FMA-1614(*) 870 FVL-1614(*) 705 1/8 2 SCCM FMA-1615(*) 870 FVL-1615(*) 705 1/8 5 SCCM FMA-1603(*) 870 FVL-1603(*) 705 1/8 10 SCCM FMA-1616(*) 705 FVL-1616(*) 540 1/8 20 SCCM FMA-1604(*) 705 FVL-1604(*) 540 1/8 50 SCCM FMA-1617(*) 625 FVL-1617(*) 459 1/8 100 SCCM FMA-1618(*) 625 FVL-1618(*) 459 1/8 200 SCCM FMA-1619(*) 625 FVL-1619(*) 459 1/8 500 SCCM FMA-1620(*) 625 FVL-1620(*) 459 1/8 1 SLPM FMA-1605(*) 625...