Flow Control

1024CMD2F91AA

Brooks Instrument G/T 1000 Glass-Tube Variable-Area Flowmeter

About this part

Brooks Instrument 1024CMD2F91AA is a configured G/T 1000 glass-tube variable-area flowmeter. The 1024 base configuration provides vertical inlet and outlet connections, while the MD2 portion identifies a size-10 metering assembly with a 10-RS-138 float and 316 stainless-steel end fittings. The archived unit was configured with a direct-reading liquid-flow range of 0–10.9 gpm. Current Brooks GT1000 literature uses a later 1024N model-code format, so uncorroborated portions of the historical C-revision suffix must be checked against the instrument nameplate or calibration record

Configurations vary. Verify the exact unit before choosing a replacement.

Specifications Documents (4)Photos (0)Listing history

No archived photo available

Key Facts

ManufacturerBrooks Instrument G/T 1000 (GT1000)

Part number1024CMD2F91AA

Product familyConfiguration-specific

Device typeFlowmeter

Configuration statusConfiguration varies

Application classIndustrial automation and process equipment

CategoryFlow Control

Specifications

Identification

Manufacturer	Brooks Instrument
Product series	G/T 1000 (GT1000)
Configured identifier	1024CMD2F91AA

Exact configuration

Connection orientation	Vertical inlet and vertical outlet (1024 base configuration)
Meter size	Size 10 (code M)
Metering-tube family	R-10M-25-3, 250 mm high-flow tube configuration
Float	10-RS-138 (code D for a size-10 meter)
End-fitting material	316 stainless steel (code 2)
Process connection size	1 inch for the size-10 vertical-connection configuration
Nominal scale length	250 mm
Reference overall height	19.69 in (500 mm) for the GT1000 size-10 vertical-inlet/vertical-outlet configuration

GT1000 family

Measurement principle	A float rises within a vertically installed tapered glass tube until fluid and gravitational forces reach equilibrium; float position indicates volumetric flow
Standard flow accuracy	±2% of full scale; ±1% of full scale was optional
Repeatability	≤0.5% of full scale
Metering-tube material	Borosilicate glass
Housing	Cast aluminum with epoxy-painted finish
Window material	Polycarbonate with ultraviolet inhibitor
Ambient-temperature range	33–125°F (1–52°C)
Operating-fluid temperature range	33–250°F (1–121°C), subject to the configured unit's pressure/temperature rating

Historical model-code interpretation

The configured identifier uses an earlier C-revision G/T 1000 code. Segments that remain consistent with Brooks' later GT1000 tables can be interpreted directly; the remaining legacy suffix should not be translated position-for-position from the newer 1024N code.

Segment	Supported interpretation	Technical boundary
1024C	Historical G/T 1000 model with vertical inlet and vertical outlet	Current public documentation identifies the corresponding later base model as 1024N; the C revision is documented by historical G/T 1000 part records.
M	Size 10; R-10M-25-3 metering-tube family	The later GT1000 code chart retains M for the size-10, 250 mm tube.
D	10-RS-138 float for a size-10 meter	The size-dependent float table maps D to 10-RS-138.
2	316 stainless-steel end fittings	Brooks' GT1000 ordering table maps option 2 to 316 stainless steel.
F91AA	Historical scale, connection, and accessory suffix	No public manufacturer code table for the C revision was located; these characters require the original calibration sheet or nameplate for a complete positional decode.

Replacement and retrofit context

Brooks identifies the GT1600 Series as the current configurable replacement platform for GT1000 meters. Its dimensional tables expressly include the GT1000 1024 vertical-inlet/vertical-outlet footprint, including the 250 mm size-10 configuration.

Current replacement familyBrooks GT1600 Series

Referenced legacy footprintGT1000 model 1024, vertical inlet and vertical outlet

Size-10 reference height19.69 in (500 mm)

Selection requirementA replacement must be selected for the original flow calibration, fluid and process conditions, fitting material, connection size and type, seal compatibility, pressure rating, scale, accuracy, and installed footprint.

Glass-tube service precautions

The manufacturer's operating instructions treat the glass metering tube as a pressure-containing component requiring controlled installation and servicing.

Completely depressurize the process line before disassembly, cleaning, or repair.
Keep the protective sleeve installed over size-10 glass tubes and secure the meter windows before operation.
Introduce flow gradually and avoid pressure shocks; fast-acting solenoid valves can damage the glass tube.
Confirm that the tube, float, scale, process fluid, and calibration conditions agree before returning the meter to service.