3621-13B4B1A is a Brooks Instrument armored variable-area flow meter identifier observed in Sonisys auction history and exact surplus listings. Exact listing context identifies it as a Brooks Ar-Met variable-area flow meter with 15-150 GPM and 2 inch wording. Brooks Ar-Met / MT3600 family documentation supplies the technical baseline, while the final flow scale, process connection, materials, pressure rating, and installed options should be verified from the physical unit label
Configurations vary. Verify the exact unit before choosing a replacement.
Application classIndustrial automation and process equipment
CategoryFlow Control
Specifications
Identification
Part identifier
3621-13B4B1A
Device type
Armored variable-area flow meter
Series context
Brooks Ar-Met / MT3600-style armored flowmeter family
Flow
Measuring principle
Variable-area flow measurement with a float in a tapered metering tube
Observed Listing Context
Observed flow range
Exact surplus listing identifies this part as 15-150 GPM
Observed connection size
Exact surplus listing identifies this part with 2 inch wording
Applications
Application domain
Process flow indication for liquid or gas service where an armored metal-body variable-area meter is appropriate
Family Performance
Accuracy
Brooks Ar-Met / MT3600 family documentation lists +/-10% full scale standard accuracy, with +/-5% full scale optional accuracy
Repeatability
Brooks Ar-Met / MT3600 family documentation lists 1% full scale repeatability
Family Ratings
Temperature range
Brooks Ar-Met / MT3600 family documentation lists -20 to 500 F fluid-temperature context, with alarm options limited to lower temperatures
Pressure-rating boundary
Pressure rating depends on process connection, size, body material, and temperature; the family data sheet gives separate ratings for threaded, socket-welded, and flanged configurations
Materials
Body and wetted-material context
Brooks Ar-Met / MT3600 family documentation describes stainless steel as standard, with other materials such as Monel or Hastelloy available depending on configuration
Indicator housing
Brooks Ar-Met / MT3600 family documentation describes die-cast aluminum or stainless steel indicator housing options
Options
Alarm options
Brooks Ar-Met / MT3600 family documentation describes optional high and low flow alarms for configured units
Scale options
Direct-reading scales and millimeter-reference scales are family-level options depending on ordered configuration
Configuration
Configured-unit rule
Flow range, tube size, float, body material, process connection, flange class, indicator material, alarm package, and scale vary by configured model code
Part Photos
5 images
Historical archive images for identification, labels, connectors, and condition reference, not current inventory.
Historical Listings & Prices
Historical listing data, not a current offer
Archive records8Tracked historical listing records
Historical median price$799.99Based on archived listing records
Recorded price range$799.99 - $799.99Low to high recorded listing price
Local documents0PDF copies available from Sonisys
Recorded price context
The typical recorded price range is $799.99 to $799.99. Based on 8 archived listing records; not a current offer, appraisal, or confirmed sale price.
View archived listing titles
BROOKS 3621-13B4B1A Variable Area Flow Meter T158886
BROOKS 3621-13B4B1A VARIABLE AREA FLOW METER T158886
Archived listings
Other Part Numbers & Aliases
3621-13B4B1ABrooks 3621-13B4B1ABrooks Instrument 3621-13B4B1ABrooks 3621-13B4B1A Ar-MetBrooks 3621-13B4B1A Variable Area Flow Meter3621-13B4B1A Variable Area Flow Meter3621-13B4B1A Ar-Met Flow Meter3621-13B4B1A 15-150 GPM3621-13B4B1A 2 Inch Flow Meter
