MT3819 is the base model designation for a legacy Brooks metal-tube variable-area flowmeter. It uses an ETFE-lined stainless-steel metering tube for aggressive liquid and gas service and magnetically couples float movement to a dial indicator. MT3819 alone is not a complete configured order code; meter size, float, flange, scale, accuracy selection, housing, electronics, certification, and accessory options require the full model code or unit nameplate
Configurations vary. Verify the exact unit before choosing a replacement.
Application classIndustrial automation and process equipment
CategoryFlow Measurement
Specifications
Identification
Product type
Metal-tube variable-area flowmeter
Measurement
Measuring principle
Variable area; float movement is magnetically coupled to the dial indicator
Applications
Documented media
Aggressive liquids and gases
Construction
Metering tube
316L stainless steel with ETFE (Tefzel) lining
Flanges and end fittings
316L stainless steel
Standard float materials
Hastelloy C-276 for meter sizes 7 and 8; PVDF for sizes 10, 12, and 13
O-rings
None
Performance
Flow accuracy
Standard ±2% of full scale; optional ±1% of full scale
Repeatability
0.25% of full scale
Published model capacity envelope
Across documented sizes and float codes: water 110–15,000 l/h (0.48–66 gpm); air 2–270 scfm or 3.2–430 Nm³/h. Each configured meter covers only its selected range
Air reference conditions
Scfm values at 70°F and 14.7 psia; Nm³/h values at 0°C and 1.013 bar absolute
Process
Gas-service minimum pressure
Greater than 29 psia / 2 bar absolute
Meter-only fluid temperature
−20°F to 302°F (approximately −29°C to 150°C); electronics can impose lower limits
Pressure rating
Configuration-dependent; governed by the selected flange rating
Mechanical
Connection sizes
1/2 in (meter sizes 7 and 8), 1 in (size 10), 1-1/2 in (size 12), and 2 in (size 13)
Flange connections
ANSI B16.5 Class 150 or Class 300 raised-face flanges, or DIN PN40 flanges, depending on configuration
Installation orientation
Vertical inlet and vertical outlet; flow from bottom to top
Indication
Scale
Detachable aluminum plate with direct-reading or percentage-of-maximum-flow graduations; single or dual scales available
Enclosure
Standard indicator housing
Die-cast aluminum housing with glass window; NEMA 4X construction
Options
Indicator and electronics availability
Indicator-only, inductive-alarm, and Smart Meter Manager 4–20 mA/HART transmitter configurations were offered. MT3819 does not identify which option is installed
What Does MT3819 Mean?
The identifier establishes the Brooks MT3819 model but omits the appended ordering characters needed to identify the configured unit. Brooks’ published ordering table uses 3819/B as its model-number entry; the submitted identifier MT3819 remains unchanged and should not be silently normalized.
Segment
Field
Interpretation
MT3819
Base model
ETFE-lined metal-tube variable-area flowmeter for aggressive liquid and gas service
Not present
Material certification
The identifier does not distinguish standard construction from documented certificate selections
Not present
Meter and connection size
Unknown; documented model sizes span 1/2 through 2 inches
Not present
Float selection
Unknown; float code establishes the configured flow capacity
Not present
Flange selection
Unknown; documented choices include ANSI Class 150/Class 300 RF and DIN PN40
Not present
Accuracy and scale
Unknown; the order code distinguishes accuracy and direct-reading or percentage scales
Not present
Indicator and electronics
Unknown; indicator-only, alarm, and transmitter configurations were available
Not present
Power, relay, certification, and accessories
Unknown; requires the full configured code or readable nameplate
