Flow Control
0550EB34H2DA
Brooks Instrument Model 0550E Mass Flow Controller
About this part
Brooks Instrument 0550EB34H2DA is a configured Model 0550E gas mass flow controller. The 0550E combines a flow sensor, control valve, integral control electronics, and an AC power supply to measure and regulate gas flow. A photographed calibration certificate for the exact unit identifies a 30,000 sccm hydrogen range, 45 psig inlet pressure, and 21 psig outlet pressure; these are configuration-specific values, not universal 0550E specifications
Configurations vary. Verify the exact unit before choosing a replacement.
No archived photo available
Key Facts
Specifications
| Manufacturer | Brooks Instrument |
| Product family | Model 0550E |
| Controlled medium | Gas |
| Operating principle | Mass-flow measurement with an integral modulating control valve and electronic control circuit |
| Accuracy | ±1% of full scale over the specified range when used at calibration conditions |
| Specified control range | 2–100% of full scale |
| Repeatability | 0.25% of rate over the specified range |
| Response time | Within 2% of full scale of the final value in 5 seconds or less for a step between 3% and 100%, including transitions to or from valve override |
| Warm-up time | 40 minutes |
| Operating temperature | 15–45 °C |
| Standard calibration pressure | 25 psig |
| Inlet-pressure range stated by manual | 10–50 psig; 15–50 psig for 200 slpm hydrogen units |
| Maximum pressure | 1500 psig |
| Leak integrity | 3 × 10^-8 cc·atm/s helium maximum, inboard to outboard; less than 2% of full scale through the valve |
| Primary power | 105–125 VAC, 50/60 Hz, 15 W maximum |
| Command input | 0–5 VDC at 0.25 mA |
| Flow outputs | 0–10 VDC into at least 2 kΩ and 0–1 VDC into at least 1 MΩ |
| Reference output | 5 V ±0.2%; 1 kΩ maximum load |
| Mating connector | Amphenol 165-10 |
| Standard process connections | 1/4-inch compression fittings |
| Optional process connections | Other inch compression fittings, -4 and -8 VCO, and -4 VCR configurations were available |
| Weight | 5 lb 10 oz (approximately 2.55 kg) |
| Standard flow reference | 70 °F (21.1 °C) and 760 mm Hg |
Configuration-dependent calibration
The 0550E restrictor and control-valve orifice are selected for the calibration gas, full-scale flow, and operating pressures. Brooks documentation warns that changing the gas or calibration conditions can shift the indicated flow and may require a different restrictor, orifice, and recalibration. The exact unit's gas, range, pressure conditions, fittings, and seal materials should therefore be verified from its calibration label or certificate before installation.
Control and installation features
Compatibility and replacement context
These relationships apply to the 0550E family and do not establish a drop-in replacement for every configured unit.
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 $499.90 to $499.90. Based on 1 archived listing record; not a current offer, appraisal, or confirmed sale price.
View archived listing titles
- BROOKS MASS FLOW CONTROLLER 0550C SERIES 30000- SCCM N2 0550EB34H2DA 45 PSIG