Flow Control
1024NM0A2AA2F9C00001
Brooks Instrument GT1000 Glass-Tube Variable-Area Flow Meter
About this part
Brooks Instrument 1024NM0A2AA2F9C00001 is a configured GT1000 Series mechanical variable-area flow meter based on the vertical-inlet/vertical-outlet 1024N model. Its ordering code specifies a size-10 borosilicate metering tube, 10-RV-64 stainless-steel float, 316 stainless-steel end fittings, Viton seals, 1/2-inch female NPT connections, a direct-reading gas scale, and ±2% full-scale accuracy. The configuration has no alarm, needle valve, factory panel-mounting option, or additional certificate requirement
Configurations vary. Verify the exact unit before choosing a replacement.
Key Facts
Specifications
| Manufacturer | Brooks Instrument |
| Product family | GT1000 Series |
| Base model | 1024N; identified in GT1000 literature as the GT1024 vertical-connection model |
| Measuring principle | Mechanical variable-area measurement using a float in a tapered glass tube |
| Connection orientation | Vertical inlet and vertical outlet |
| Meter size and tube | Size 10; R-10M-25-3FT rib-guided metering tube |
| Float | 10-RV-64, 316 stainless steel |
| End-fitting material | 316 stainless steel |
| Seal material | Viton fluoroelastomer O-rings |
| Process connections | 1/2-inch female NPT threaded connections |
| Scale configuration | Right-side direct-reading gas scale; no left-side scale |
| Accuracy | ±2% of full scale |
| Alarm configuration | None |
| Needle valve or flow controller | None |
| Factory panel-mounting option | None |
| Certificates and special processes | No oxygen-service declaration, international calibration certificate, or additional certificate requirement encoded |
| Identification marking | Standard Brooks identification |
| Reference air capacity | 25 SCFM at 70°F and 14.7 psia; 40 normal m³/h at 20°C and 1.013 bar |
| Reference air pressure drop | 14 inches water column (3.5 kPa) |
| Reference water capacity | 6.2 GPM (1,400 L/h); sizing-table value, not the configured gas-scale calibration |
| Reference water pressure drop | 12 inches water column (3 kPa) |
| Viscosity immunity ceiling | 15 cSt for a fluid specific gravity of 1.0 |
| Maximum non-shock operating pressure | 175 psig (12.1 bar) for a size-10 meter with NPT connections, at fluid temperatures through 250°F (121°C) |
| Operating-fluid temperature | 33 to 250°F (1 to 121°C) |
| Ambient temperature | 33 to 125°F (1 to 52°C) |
| Repeatability | ≤0.5% of full scale |
| Metering tube | Borosilicate glass |
| Window | Polycarbonate with ultraviolet inhibitor |
| Housing | Epoxy-painted cast aluminum |
| Hardware and size-10 float stops | Stainless steel |
| PED classification | Sound Engineering Practice (SEP) for GT1000 meter size 10 |
| Approximate shipping weight | 25 lb (11.4 kg) for a size-10 meter with NPT connections |
Ordering-code decoding
The manufacturer’s GT1000 ordering table decodes the complete identifier as follows.
| Position | Code | Configured meaning |
|---|---|---|
| I | 1024N | Vertical inlet and vertical outlet base model |
| II | M | Size 10, R-10M-25-3FT tube |
| III | 0 | No alarm switch or relay |
| IV | A | 10-RV-64 standard float for size 10 |
| V | 2 | 316 stainless-steel end fittings |
| VI | A | Viton O-rings |
| VII | A | Female NPT threaded connection |
| VIII | 2 | 1/2-inch connection size |
| IX | F | Right-side direct-reading gas scale |
| X | 9 | No left-side scale |
| XI | C | ±2% full-scale accuracy |
| XII | 0 | No needle valve or flow controller |
| XIII | 0 | No factory panel-mounting option |
| XIV | 0 | No special process or oxygen-service certificate |
| XV | 0 | No additional certificate requirement |
| XVI | 1 | Standard Brooks identification |
Calibration and range boundary
The ordering code establishes that this unit carries a direct-reading gas scale, but it does not encode the calibrated gas, scale units, operating pressure, operating temperature, or exact scale endpoint. Those values must be read from the installed scale and calibration markings. The published 25-SCFM air capacity is the manufacturer’s sizing-table reference for the selected R-10M-25-3FT tube and 10-RV-64 float; it should not be treated as the unit’s exact calibrated full-scale value without label confirmation.
Installation and glass-tube safety
Applicable GT1000 handling and installation requirements include:
- Mount the meter within 6 degrees of true vertical, with the inlet at the bottom and outlet at the top.
- Keep the protective sleeve over the glass tube on meter sizes 7 through 13 and fasten the meter window securely.
- Do not exceed the applicable pressure or temperature limits, and do not service the meter while it is pressurized.
- Introduce flow slowly and use upstream valving or bypass piping to prevent pressure and flow surges.
- Do not use a solenoid valve where its pressure shock could damage the glass tube.
- If liquid is isolated between closed inlet and outlet valves, drain the meter to prevent thermal-expansion damage.
Current replacement family
Brooks identifies the GT1000 as a legacy product and offers the GT1600 Series as its configurable retrofit family.
Documentation Downloads
Local PDF copiesPart Photos
5 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 $299.99 to $299.99. Based on 1 archived listing record; not a current offer, appraisal, or confirmed sale price.
View archived listing titles
- Brooks 1024NM0A2AA2F9C00001 Mass Flow Meter – Model 1024N, Digital Thermal Se...