Flow Control
GP200-200345
Brooks Instrument GP200 Series Pressure-Based Mass Flow Controller
About this part
GP200-200345 is a market-record identifier associated with a Brooks Instrument GP200 Series pressure-based mass flow controller. The GP200 platform is metal-sealed, digital, and designed for ultra-high-purity semiconductor process-gas service. An archived unit was represented as a 30 sccm N2 controller, but “200345” is not a configuration suffix defined in Brooks’ GP200 model-code tables. The unit’s complete label or manufacturer configuration record is required to establish its valve, bin, fitting, communications, pressure, downstream-condition, shutoff, and calibration options
Configurations vary. Verify the exact unit before choosing a replacement.
No archived photo available
Key Facts
Specifications
| Record identifier | GP200-200345 |
| Manufacturer | Brooks Instrument |
| Product series | GP200 Series |
| Manufacturer-defined base model | GP200 — ultra-high-purity pressure-based mass flow controller |
| model-code status | The hyphenated identifier GP200-200345 is not a complete configuration code in Brooks’ published GP200 ordering structure |
| Service medium | Gas |
| Construction | Metal-sealed, digital, ultra-high-purity |
| Measurement architecture | True differential-pressure sensor with laminar flow element and downstream control valve |
| Configurable full-scale flow envelope | 3 to 50,000 sccm N2 equivalent; configured range depends on gas, bin, and application |
| Process-gas accuracy, 5–100% full scale | <±1% of setpoint; an additional <±0.05% of full scale applies to analog control |
| Matched transient response | 280 ±20 ms for ascending or descending non-zero setpoints; a fast-response option is available by customer special request |
| Supply-pressure disturbance performance | <±1% of setpoint during inlet-pressure disturbances up to 40 psi/s |
| Dynamic back-pressure performance | Maintains specified accuracy during a vacuum-to-1200 Torr disturbance occurring over one second |
| Operating temperature | 10 to 60°C; re-zeroing at ambient operating temperature is required |
| Operating inlet-pressure options | Low-pressure configurations below 15 psia and nominal ranges of approximately 15–30, 25–40, 35–50, or 45–60 psia; application sizing is configuration-dependent |
| Operating outlet pressure | Vacuum to atmosphere; positive-pressure configurations support up to 1200 Torr for qualifying applications |
| Design pressure | 150 psia |
| Proof pressure | 100 psia for CT-bin devices, reduced to 70 psia for helium or helium mixtures; 45 psia for LP-bin devices |
| Burst pressure | 1000 psia |
| External leak integrity | 1 × 10^-10 atm·cc/s helium |
| Wetted materials | 316L, Hastelloy C-22, 316/316L stainless steel, 304 stainless steel, KM-45, and PCTFE |
| Wetted surface finish | 5 µin Ra average |
| Available fittings | 92 mm C-Seal, 92 mm W-Seal, 124 mm 1/4-inch male VCR, or 92 mm C-Seal with poke-yoke |
| Communications options | DeviceNet, EtherCAT, 0–5 V analog with RS485 L-Protocol, or 0–5 V analog only; interface is model-specific |
| Diagnostics | Integrated rotatable LCD, status indicators, alarms, and an independent RS485 micro-USB service port; availability varies by interface |
What Does GP200-200345 Mean?
Only the GP200 portion is defined by Brooks’ published model code. The remaining digits cannot be decoded as configured options from public manufacturer documentation.
| Segment | Field | Interpretation |
|---|---|---|
| GP200 | Base model | Brooks defines GP200 as an ultra-high-purity pressure-based mass flow controller. |
| -200345 | Unresolved secondary identifier | This hyphenated suffix is not a valve, gas/range, bin, fitting, communications, pressure, downstream-condition, shutoff, or calibration segment in Brooks’ public GP200 model code. |
| Complete GP200 model code | Configured-unit identity | A complete code separately specifies valve configuration, gas/range, bin, fitting, communications, customer special request, minimum inlet pressure, downstream condition, auto shutoff, and reference temperature. Those segments are not present here. |
GP200 Standard N2-Equivalent Bin References
Brooks lists nine standard N2-equivalent bin references. These are family ordering references and do not establish the configuration of GP200-200345. The observed 30 sccm N2 description corresponds to the CT41 reference only if confirmed by the complete device label or manufacturer record.
| Bin | Gas/range option | Standard N2-equivalent full scale |
|---|---|---|
| CT40 | 0013 010C | 10 sccm |
| CT41 | 0013 030C | 30 sccm |
| CT42 | 0013 100C | 100 sccm |
| CT43 | 0013 300C | 300 sccm |
| CT44 | 0013 001L | 1,000 sccm |
| CT45 | 0013 003L | 3,000 sccm |
| CT46 | 0013 010L | 10,000 sccm |
| CT47 | 0013 025L | 25,000 sccm |
| CT48 | 0013 045L | 45,000 sccm |
Configuration-Dependent Valve Performance
GP200 control range, low-range accuracy, and valve leak-by depend on the ordered valve. GP200-200345 does not identify which valve is fitted.
| Characteristic | Positive shutoff / zero-leak valve (P) | Normally closed metal-seat valve (C) |
|---|---|---|
| Control range | 0.5–100% full scale | 2–100% full scale |
| Accuracy at 5–100% full scale | <±1% of setpoint | <±1% of setpoint |
| Low-range accuracy | <±0.05% of full scale from 0.5–5% full scale | <±0.05% of full scale from 2–5% full scale |
| Repeatability and reproducibility at 5–100% full scale | ±0.15% of setpoint | ±0.15% of setpoint |
| Low-range repeatability and reproducibility | ±0.015% of full scale from 0.5–5% full scale | ±0.015% of full scale from 2–5% full scale |
| Valve leak-by at 45 psia to vacuum | <0.02% of bin full scale for bins 40–41; <0.005% for bins 42–46; unavailable with CT47–CT48 | <0.15% of bin full scale |
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 $1,212.25 to $1,212.25. Based on 1 archived listing record; not a current offer, appraisal, or confirmed sale price.
View archived listing titles
- Brooks Instrument GP200-200345 Mass Flow Controller MFC 30 SCCM N2 New