Flow Control
MT3750
Brooks Ar-Mite Low Flow Armored Flowmeter
About this part
MT3750 is the Brooks Instrument Ar-Mite MT3750C low-flow armored metal tube variable-area flowmeter family. It is used for gas or liquid flow indication in high-pressure or difficult-fluid applications, with stainless steel or Monel wetted-material configurations, magnetically coupled indication, and optional transmitters, alarms, valves, and flow controllers. Exact range, float, connection, pressure rating, elastomer, alarm/transmitter package, and approval details depend on the configured 3750... model code and unit label
Configurations vary. Verify the exact unit before choosing a replacement.
Key Facts
ManufacturerBrooks Instrument
Part numberMT3750
Product familyMT3750 Series
Device typeFlowmeter
Configuration statusConfiguration varies
Application classIndustrial automation and process equipment
CategoryFlow Control
Specifications
Identification
| Device type | Low-flow armored metal tube variable area flowmeter |
| Series family | Brooks Ar-Mite MT3750C Series |
Flow
| Measuring principle | Variable area metal tube flow measurement with magnetically coupled indication |
| Liquid capacity range | Water-equivalent ranges from 0.025-0.25 gph / 0.096-0.96 l/h through 2.8-26 gph / 11-100 l/h depending on meter size |
| Gas capacity range | Air-equivalent ranges from 2.4-15 ln/h through 12-110 scfh / 0.31-3.1 m3n/h depending on meter size |
Performance
| Rangeability | 10:1 for most sizes |
| Accuracy | 5%, 3%, VDI/VDE class 4, or class 2.5 depending on configured meter |
| Repeatability | 1% full scale |
Materials
| Metering tube materials | 316L stainless steel or Monel K-500 |
| End fitting materials | 316L stainless steel or Monel K-500 |
| Float materials | 316L stainless steel or titanium Grade II |
| O-ring options | Viton, PTFE Teflon, Buna-N, Kalrez 4079, and Ethylene Propylene |
Connections
| Connection options | 1/4 inch to 3/4 inch NPT female, 1/4 inch tube compression, and 6 mm tube compression |
Ratings
| Standard pressure rating | 1500 psig / 100 bar |
| High-pressure option | 4000 psig / 276 bar for no-valve 1/4 inch NPT configurations |
| Maximum fluid temperature | 204 C / 400 F, subject to ambient temperature and elastomer option limits |
| Ambient temperature limit | 65 C / 150 F maximum ambient unless factory guidance applies |
Controls
| Optional transmitter | 4-20 mA transmitter option based on float assembly position |
| Optional alarms | One or two inductive switches or one or two reed switches depending on configured package |
| Optional valves/controllers | Cartridge valves, NRS valves, needle valve, and integrally mounted flow-controller options are documented for the family |
Protection
| Enclosure protection | Alarm options IP65 / NEMA 4X; transmitter option IP66/IP67 / NEMA 4X |
Approvals
| Compliance context | RoHS, PED Sound Engineering Practice, CRN, CSA/UL, ATEX, IECEx, NEPSI, and related alarm/transmitter certifications are documented depending on option |
Applications
| Application domain | Low-flow gas and liquid indication in high-pressure, hazardous, remote, tight-space, and difficult-fluid process applications |
Configuration
| Configured-unit rule | Flow range, process connection, float, elastomer, material, valve, transmitter, alarm, pressure rating, and temperature rating vary by configured model code |
Observed variants
| Stored auction configuration contexts | Observed titles include 1/4 inch NPT, 2.5-24 SCFH, 300 psig at 350 F, and 1500 psi at 400 F contexts; these are listing-specific observations, not universal MT3750 specifications |
Documentation Downloads
Local PDF copiesPart Photos
41 imagesHistorical archive images for identification, labels, connectors, and condition reference, not current inventory.
Historical Listings & Prices
Historical listing data, not a current offerArchive records17Tracked historical listing records
Historical median price$199.99Based on archived listing records
Recorded price range$49.99 - $750.00Low to high recorded listing price
Local documents2PDF copies available from Sonisys
Recorded price context
The typical recorded price range is $49.99 to $659.00. Based on 17 archived listing records; not a current offer, appraisal, or confirmed sale price.
View archived listing titles
- BROOKS MT3750 3750CA3A11CDAAAAA0 1500PSI AT 400F
- BROOKS INSTRUMENT FLOWMETER, MT 3750 MODEL 3750CA4A11CEAAAAA0
- Brooks Instrument / MT3750 Low Flow Armored Flowmeter / 3750CC1A11BCAAAFAO
- BROOKS MT3750 3750CA4A11VCAAAAA0 300 PSIG AT 350F B404
- BROOKS MT3750 3750CA1A11CDEAAAAA0 1500PSI AT 400F. B404
- BROOKS MT3750 3750CA5A11CDEAAAAA0 1500PSI AT 400F. B404
Archived listings
Other Part Numbers & Aliases
MT3750MT 3750Brooks MT3750Brooks Instrument MT3750Brooks MT 3750Brooks Ar-MiteAr-Mite MT3750MT3750CBrooks MT3750C3750CA2B11AEAAAAA03750CA6D11AEAAAAA03750CC513CJAMAA03750CA4A11CEAAAAA03750CA4A11VCAAAAA03750CA1A11CDEAAAAA03750CA5A11CDEAAAAA03750CA3A11CDAAAAA03750CC1A11BCAAAFA03750CZ933750-MAT