Mass Flow Controllers & Meters

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MCD–Series: Bidirectional Gas Mass Flow Controllers

MCD-Series Bidirectional Gas Mass Flow Controllers can control mass flow, volumetric flow, or gas pressure in both directions while simultaneously measuring flow, pressure, and temperature.
  • Versatile & accurate. Real-time control of flow or pressure in both directions with NIST-traceable accuracy to ±0.5% of reading or ±0.1% of full scale for 98+ gases and 20 custom-defined mixtures.
  • Fast control, multivariate data. Millisecond-response times immediately upon powering up, to control either mass flow, volumetric flow, or pressure and display instantaneous flow, pressure, and temperature readings, in your choice of engineering units.
  • Easy integration. Custom process ports and electrical connectors, and your choice of EtherNet/IP, EtherCAT, DeviceNet, Profibus, Modbus (RTU and TCP/IP), or serial communications for easy integration into your industrial process.

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Accessories included with purchase

Device specs and customization options

Quick Specs
MCD-Series performance (most products)
  • Available full scale ranges: 0.5 SCCM to 3000 SLPM
  • Steady state control range: 0.01% to 100% of full scale
  • Standard accuracy calibration, NIST–traceable: ±0.6% of reading or ±0.1% of full scale, whichever is greater
  • Optional high-accuracy calibration, NIST–traceable: ±0.5% of reading or ±0.1% of full scale, whichever is greater
  • Repeatability: ±(0.1% of reading + 0.02% of full scale)
  • Typical control response time: as fast as 30 ms
  • Warm–up time: <1 s
MCD-Series operating conditions
  • Compatible gases: 98 pre–loaded selectable gas calibrations; additional mixtures definable with COMPOSER™
  • Operating temperature: –10°C to +60°C
  • Full scale operating pressure: 160 PSIA
  • Max differential pressure: 75 PSID
  • Proof pressure: 175 PSIA
  • Reference conditions: user-selectable; defaults: 25°C & 1 ATM (STP) and 0°C & 1 ATM (NTP)
Device Ranges & Full Specs

Devices are custom ranged from 0.5 SCCM full scale to 3,000 SLPM full scale with controllable ranges of -100% to 100% of full scale.

For a comprehensive device guide, read the mass flow controller operating manual.

Device Features
Included with each device
  • Multi-variable process measurements: Simultaneously measure mass flow, volumetric flow, gas pressure, and gas temperature.
  • User changeable units of measurement: Change the unit of measurement for pressure, flow, or temperature from our extensive list of engineering units.
  • Gas selectability: Select your process gas from any of the 98+ preloaded NIST-traceable gas calibrations in our gas list.
  • Gas Select COMPOSER™: Define 20 custom gas mixtures of up to 5 constituent gases using our Gas Select Composer firmware.
  • Monochrome backlit LCD with integrated touchpad: Easily read measurements using the backlit display and control configurations with the user-friendly integrated touchpad.
  • User adjustable setpoint ramping & limits: Configurable ramp rates allow the process variable to be controlled as fast or as slow as desired, and configurable setpoint limits protect processes from inadvertent setpoint changes.
  • User adjustable standard temperature and pressure (STP) conditions: Quickly change reference conditions without need for recalibration.
  • Valve close override and valve open override: Utilize alarms to quickly vent your system or stop all flow as needed.
Request at time of purchase | Free
  • Optional integrated totalizers & batch control: Totalize mass flow every 1 ms for precise tracking of total flow over time and use batch control to dispense precise volumes.
Request at time of purchase | Additional cost
  • Optional integrated potentiometer control: Use the integrated potentiometer to adjust setpoints with the simple turn of a knob.
Device Customization Options
Build and performance options
  • Communications protocols: Analog, RS–232, RS–485, DeviceNet, EtherCAT, EtherNet/IP, Modbus RTU or TCP/IP, PROFIBUS
  • Displays: Backlit monochrome or color; integrated or panel–mount
  • Process connections: NPT, SAE, AN, BSPP/G, compression, VCR, or VCO fittings
  • Elastomers: Viton, FFKM, EPDM, Silicone
  • Calibration: High-accuracy; custom calibration points
Valve options & PID tuning

Your mass flow controller may be customized with one of the following valving options to ensure optimal performance under your expected process conditions.

  • MCD: small proportional control valve for flow ranges of 20 SLPM and below
  • MCD with PCA designation: high-performance proportional control valve used for some applications with higher pressures
  • MCPD: small proportional control valve with the largest orifice (not available for corrosive configurations)
  • MCRD: nearly frictionless large Rolamite proportional valve for flow rates of 50 SLPM and above

Custom PID valve tuning ensures maximum performance for your specific process conditions.

Optional Accessories
Accessories | Sold separately
  • Process port fittings and filters
  • Power supplies
  • Communications cables and conversion cables
  • BB3 and BB9 multi-drop breakout boxes

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