Flow Measurement
QMBM3L1A2A1A1A1CC1A1A1FA
Brooks Instrument QUANTIM Coriolis Mass Flow Meter
About this part
QMBM3L1A2A1A1A1CC1A1A1FA is a legacy Brooks Instrument QUANTIM QMB mass flow meter configured with a size-3 316L sensor, liquid as the primary fluid, no valve or pressure transducer, an IP40 enclosure, 1/4-inch tube-compression connections, dual 0–5 VDC analog outputs, Viton seals, and a 15-pin D-type electrical connection. It directly measures mass flow and can provide density or temperature as a secondary variable
Configurations vary. Verify the exact unit before choosing a replacement.
No archived photo available
Key Facts
Specifications
| Manufacturer | Brooks Instrument |
| Series | QUANTIM QMB Series |
| Base model | QMBM flow meter |
| Measuring principle | Direct Coriolis mass-flow measurement |
| Primary fluid selection | Liquid; changing between liquid and gas requires rezeroing |
| Tube size | 3 (medium) |
| Nominal liquid flow rating | 1.00 kg/h |
| Minimum full scale | 0.10 kg/h |
| Minimum measurable liquid flow | 0.010 kg/h |
| Standard liquid accuracy | 0.2% of rate for the stainless-steel sensor, or the documented zero-stability-to-flow-rate term, whichever is greater |
| Repeatability | ±0.05% of rate or ±[0.5 × (zero stability / flow rate) × 100]%, whichever is greater |
| Meter settling time | Less than 0.5 second to within 2% of full scale, subject to the documented low-flow accuracy term |
| Temperature measurement accuracy | ±0.5°C |
| Pressure transducer | None |
| Control valve | None; measure-only configuration |
| Enclosure | NEMA 1 / IP40, without an encoded hazardous-area classification |
| Housing | Polyurethane-painted aluminum |
| Standard surface finish | Documented as 32 Ra |
| Sensor tube material | 316L stainless steel |
| Maximum operating pressure code | 35 bar / 500 psi |
| Maximum temperature rating | 65°C / 149°F |
| Process connections | 1/4-inch tube-compression fittings |
| Process seals | Viton fluoroelastomer |
| Valve seat | None |
| IP40 weight | Approximately 1.6 kg / 3.5 lb |
| Ordered inline-filter code | F — 1 µm inline cartridge filter according to the ordering-code table |
| Primary output | 0–5 VDC active analog output |
| Secondary output | 0–5 VDC active analog output for density or temperature |
| Electrical connection | 15-pin D-type connector |
| Supply voltage | +14 to +27 VDC |
| Nominal meter current | 100–150 mA |
| Maximum meter current | 470 mA at 14 VDC |
| Maximum meter power | 6.6 W |
| Alarm output rating | 30 VDC maximum, 100 mA maximum |
| RoHS status of I/O code C | Not RoHS compliant in the 2018 QMB ordering table |
| Special processing | None encoded |
| Quality certification | None encoded |
| OEM code | Brooks |
What Does QMBM3L1A2A1A1A1CC1A1A1FA Mean?
The identifier follows the twenty-field Brooks QMB ordering structure without an undefined segment.
| Segment | Field | Interpretation |
|---|---|---|
| I — QMBM | Base model | QUANTIM flow meter; no control valve |
| II — 3 | Tube size | Medium sensor; nominal QMBM liquid rating 1.00 kg/h |
| III — L | Fluid type | Liquid selected as the primary fluid |
| IV — 1 | Pressure transducer | No transducer |
| V — A | Valve type | No valve; meter configuration |
| VI — 2 | Accuracy | Standard 0.2% of rate for liquid with stainless-steel sensor |
| VII — A | Enclosure | NEMA 1 / IP40; no area classification |
| VIII — 1 | Surface finish | Standard surface finish, documented as 32 Ra |
| IX — A | Sensor tube | 316L stainless steel |
| X — 1 | Maximum pressure | 35 bar / 500 psi |
| XI — A | Maximum temperature | 65°C / 149°F |
| XII — 1C | Process connections | 1/4-inch tube-compression fittings |
| XIII — C | Electrical I/O | Primary 0–5 VDC and secondary 0–5 VDC outputs |
| XIV — 1 | Electrical connection | 15-pin D-type connector for IP40 enclosure |
| XV — A | Seals | Viton sensor and fitting seals |
| XVI — 1 | Valve seat | None; meter configuration |
| XVII — A | Special processing | None |
| XVIII — 1 | Quality certification | None encoded |
| XIX — F | Inline filter | 1 µm inline cartridge filter |
| XX — A | OEM code | Brooks |
15-Pin Meter Interface
Relevant connections for the code-C, measure-only configuration.
| Pin | Function |
|---|---|
| 2 | Primary 0–5 VDC flow output |
| 3 | Open-drain alarm output |
| 5 | +14 to +27 VDC power |
| 9 | Power-supply common |
| 10 | Signal-output common |
| 11 | +5 VDC reference output |
| 13 | Secondary 0–5 VDC density or temperature output |
Replacement and Compatibility
Brooks identifies the current QUANTIM QMC Series as the successor to the legacy QMB Series and describes it as form-, fit-, and function-compatible with second-generation QMB models. The successor uses updated electronics, diagnostics, and communication options, so an exact replacement must be selected against the complete process and electrical configuration.
Installation and Service Notes
- Keep the Coriolis tube completely filled with process fluid during operation.
- For liquid service, inverted horizontal mounting or vertical upward flow helps prevent trapped gas from affecting measurement.
- Warm the powered instrument to a stable condition and perform the zeroing procedure under verified no-flow process conditions.
- Drain liquid from the meter before closing both adjacent isolation valves; trapped liquid can expand thermally and rupture the device.
- The ordering table decodes filter code F as 1 µm, while the family mechanical table generally lists 10–40 µm filters for tube sizes 3 and 4. Verify the installed element before filter replacement.
Documentation Downloads
Local PDF copiesPart Photos
0 imagesHistorical archive images for identification, labels, connectors, and condition reference, not current inventory.
Historical Listings & Prices
Historical listing data, not a current offerThe typical recorded price range is $450.00 to $450.00. Based on 1 archived listing record; not a current offer, appraisal, or confirmed sale price.
View archived listing titles
- BROOKS QUANTIM QMBM PRECISION MASS FLOW QMBM3L1A2A1A1A1CC1A1A1FA