MT3809 Series
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DATA SHEET Variable Area MT3809G Series Metal Tube Variable Area Flow Meters MT3809G General Purpose Housing Brooks ® MT3809 meter operation is based on the variable area principle. The all metal meter is ideal for a variety of gas, liquid and steam applications. These meters are indispensable where high pressure and/or high temperature operating conditions exist. The primary meter is available in 316/316L stainless steel as well as with a PTFE liner. But a wide range of corrosion resistant materials of construction are available which makes it a perfect fit for metering of aggressive applications. A broad range of connection sizes and types such as ASME, DIN and JIS flange choices along with several threaded options provide for flexible installations. The very popular mechanical indicator option does not require power which reduces installation costs and is a cost-effective solution for flow measurement in hazardous areas. Optional accessories available includes transmitter with 4-20 mA analog output with HART ® communications or Foundation TM Fieldbus communications with or without configurable alarms and pulse output for totalization. Also available are front adjustable inductive alarms, high temperature or stainless steel indicator housings, valves, flow controllers and certifications. Product Description The Brooks Model MT3809 has been the “go to” meter for several years and the choice of Engineering & Procurement Contractors (EPC) and major industrial customers. Brooks is proud to raise the performance of the standard meter by adding these new features and options: • Transmitter with 4-20mA/HART-7, or transmitter with FoundationTM Fieldbus Communications • Local Operator Interface with LCD display without removing the cover which means changes can be made even in hazardous areas • 316SS flameproof housing that meets IIC/Class 1 Div 1 to handle the toughest hazardous applications • The broadest range of operating temperatures in the industry, the perfect meter for difficult applications • Lower flow rates with the current lay lengths which means one meter style can be used for very low to high flow rates • The new meter is designed to ASME B31.3 and the gasket sealing surface is per ASME, a rugged design that does not require special gaskets at installation • Weldneck flanges are standard for MT3809 and MT3810 which means full penetration welds that can easily be tested for integrity • Mechanical and alarm design that meets SIL 2 requirements View MT3809G Series Product Page

Improved Gasket Sealing Surface • Gasket sealing surface meets ASME, special gaskets are not required LCD Display • Three line display • Adjust with/without cover in place • Multiple outputs can be displayed on one screen Redesigned Scale • White background/dark increments improve scale readability High/Low Flow Alarms • Flow rate can be constrained high, low or both high and low Weldneck Flanges • Full penetration welds which can be examined for integrity New 316 Stainless Steel Flameproof Housing • Meets IIC/Class 1 Division 1 hazardous area rating • Broadest operating temperature of

Product Description The 3809 flameproof housing has been redesigned and improved. The option is made of 316 stainless steel. This includes housing, cover, bracket and hardware. The new option now meets ATEX gas group IIC/NA class 1 Division 1. This is the highest gas protection rating available. Now this option can be used in more hazardous area applications. This option also has the broadest operating temperature range of any Variable Area meter. The new 3809 can be used in applications from -198°C to +420°C (-325°F to +788°F). The 4-20 mA output transmitter is still available with remote...

Measuring Range Metering Tube Standard Premium Flanges and End Fittings Standard Premium 316/316L (dual certified stainless steel) Tefzel Lined 316/316L (dual certified stainless steel) 316/316L (dual certified stainless steel) Alloy 625, Hastelloy C, Titanium Gr. II 2%, 1%, VDI/VDE class 2.5, 1.6 Scale type / material Dark increments with white background / Aluminum Installation orientation and location Vertical (within 5% of true vertical), bottom inlet, top outlet. Do not locate in proximity of other magnetic interfering components. Flanged: Equivalent to ANSI B16.5* to DIN 2527/2635...

Product Dimensions - General Purpose Housing Model 3809 && 3810 GeneralPurpose Indicator Housing with Model 3809 3810 General Purpose Indicator Housing with Threaded Female St'd Connections mm [inches] Threaded Female Connections mm [inches] B Model 3809 & 3810 General Purpose Indicator Housing with Flanged Connections mm [inches] C Weight (Approx.)* * Dimensions apply to threaded female 154 [6.06] 118 [4.65] 16 350 [13.78] standard connections only. ** Weights shown for aluminum indicator. Add 1.8 kg [4 lbs.] for steel indicator housing. *Weights shown for aluminum indicator. Add 1.8 [4...

Product Dimensions - Intrinsically Safe Housing Model 3809 Intrinsically Safe Indicator Housing with Model 3809 Intrinsically Safe Indicator Housing with Threaded Female St'd Connections mm [inches] Threaded Female Connections mm [inches] C Model 3809 Intrinsically Safe Indicator Housing with Flanged Connections mm [inches] B Weight (Approx.)* 16 350 [13.78] 159 [6.26] 183 [7.20] * Dimensions apply to threaded female standard connections only.

Product Dimensions - Explosion Proof Housing Model 3809 Explosion Proof Indicator Housing with Threaded Female Connections mm [inches] Model 3809 Explosion Proof Indicator Housing with Threaded Female St'd Connections mm [inches] C Model 3809 Explosion Proof Indicator Housing with Flanged Connections mm [inches] C Weight (Approx.)* * Dimensions apply to threaded female standard connections only.

Product Specifications - Pressure/Temperature Ratings

Product Specifications - Pressure/Temperature Ratings Tables (continued) Product Specifications - Temperature Cut-off Tables