Direct Thermal Mass Flow Controller for Gases, IP65 protected

  • Proven direct inline CTA sensor (no bypass)
  • Compact, rugged design (IP65, dust and waterproof)
  • Combination of flowmeter with various control valve options
  • Less sensitivity to humidity or dirt
  • Optional with integrated TFT display
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IP65 Mass Flow Controllers for high flow rates of gases

Bronkhorst® model D-6383/BJ Mass Flow Controllers (MFCs) are suited for precise measurement of flow ranges between 10…500 ln/min and 100…5000 ln/min at operating pressures between vacuum and 16 bar (g). The MFC consists of a proven inline thermal (CTA) mass flow sensor, a precise control valve and a microprocessor based pc-board with signal and fieldbus conversion. As a function of a setpoint value, the flow controller swiftly adjusts the desired flow rate. The instument is IP65 complient and can optionally be equipped with a modern, multi-functional and multi-colour display, with operator buttons on the instrument.

The digital MASS-STREAM™ series is characterized by a high degree of signal integrity and, as an option, up to 8 calibration curves of different gases and process conditions can be memorized in the instrument. In addition to the standard RS232 output the instruments also offer analog I/O. As an option, an on-board interface can be mounted to provide DeviceNet™, PROFIBUS DP, Modbus-RTU or FLOW-BUS protocols.

Technical specifications

Measurement / control system
Flow range, based on N2
(intermediate ranges available)
min. 10…500 ln/min
max. 100…5000 ln/min
Accuracy (based on calibration with Air at 5 bar (a) and T = 20 °C) ±2% FS including non-linearity*
±1,5% FS on request*
Repeatability < 0,2% FS
Turndown 1:50
Type of gases almost all gases, compatible with chosen materials
Response time sensor approx. 0,9 sec.
Operating temperature 0…50°C
Temperature sensitivity ±0.2% Rd/°C (Air)
Pressure sensitivity ±0,3% Rd/bar typical (Air)
Control stability < 0,2% FS typical
Leak integrity tested < 2 x 10-8 mbar l/s He
Attitude sensitivity at 90° deviation from horizontal max. error 0,2 % at 1 bar typical N2
Warm-up time 30 min. for optimum accuracy,
within 30 seconds for accuracy ±4% FS
Mechanical parts
Sensor Stainless steel SS 316 (AISI 316L)
Instrument body Aluminium AL 50ST/51ST (anodised) or stainless steel SS 316;
if applicable: Brass body of motor driven valve
Seals standard: Viton®; options: EPDM, Kalrez® (FFKM)
Sieves and rings Teflon or stainless steel SS 316
Pressure rating 10 bar g for instrument body in aluminium,  
16 bar g for instrument body in stainless steel SS 316
Process connections compression type or face seal couplings

Ingress protection
(housing, optional display)

(if applicable IP54 for motor driven valve)

Electrical properties
Power supply +15…24 Vdc ±10%
Current peak values Meter approx. 75 mA at 0% flow
approx. 125 mA at 100% flow
Current peak values Controller add 250 mA
add 30 mA for display, if applicable
add 50 mA for additional interface, if applicable
Analog output/command 0...5 (10) Vdc or 0 (4)…20 mA
(sourcing output)
Digital communication standard: RS232
options: PROFIBUS DP, DeviceNet™, Modbus-RTU, FLOW-BUS
Electrical connection
Analog/RS232 8 DIN (male);
PROFIBUS DP bus: 5-pin M12 (female);
power: 8 DIN (male)
Devicenet™ 5-pin M12 (male)
Modbus-RTU/FLOW-BUS 5-pin M12 (male)

* The calibration of instruments in the lower measurement range and for some gases
   could result in a reduced accuracy.

Technical specifications and dimensions subject to change without notice.

For dimensional drawings and hook-up diagrams please visit the productpage on our website


MASS-STREAM 6300 Brochure

Manual MASS-STREAM D-6300
Manual MASS-STREAM D-6300 display

Hook-up diagrams
Analog I-O RS232
PROFIBUS DP 9-pin Sub-D connector
PROFIBUS DP with 5-pin M12 connector

Solids 3D
D-6383-BJ2.8 and D-6383-BJ4.4

Bronkhorst High-Tech B.V.

Nijverheidsstraat 1A
NL-7261 AK Ruurlo (NL)
Tel. +31 573 45 88 00
[email protected]

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