HFM-D-305A / HFC-D-307A Digital "A" Flow Controller for Medium Flow​

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Fast Response, Tight Accuracy!

Mass flow techniques provide RELIABLE, REPEATABLE AND ACCURATE gas flow rate measurements.

HFM-D-305A/HFC-D-307A mass flow instruments have flow ranges from 0-1000 slm to 0-2500 slm; provide analog and digital outputs, and are constructed of stainless steel.  

Easy, user friendly digital communications with windows based software interface available.  Available with a  variety of elastomer seals for maximum flexibility.

Self diagnostics of the sensor, valve and overflow are included in the digital features. Also of interest is the auto zero feature which detects when the valve is closed and automatically resets the zero. These mass flow meters and controllers can store up to 10 calibrations of different ranges and gases.  Another feature is the built in totalizer for monitoring gas usage under user set conditions.

± (0.5% of reading + 0.2% of full scale) Accuracy

Buy from the designers, Teledyne Hastings, and experience extraordinary customer service. Let us solve your application challenges, by designing and building your flow instruments.

​​​Applications and Industries

  • Gas Delivery
  • Fire Dynamics
  • R&D Studies
  • Process Gas


HFM-D-305A MeterHFC-D-307A Controller
​Range 0 - 1000 slm to 0 - 2500 slm 0 - 1000 slm to 0 - 2500 slm 
Accuracy+ (0.5% of reading + 0.2% of full scale)+ (0.5of reading + 0.2% of full scale)
​Repeatability+ 0.15% of full scale+ 0.15% of full scale
Maximum Working Pressure500 PSIG ​500 PSIG
​Settling Time​Typically <1 Seconds​Typically <1-2 Seconds
Analog I/O (Standard)​0 - 5 VDC​0 - 5 VDC
Analog I/O (Optional)0 - 10 VDC, 0-20 mA, 4 - 20 mA
0 - 10 VDC, 0-20 mA, 4 - 20 mA
Digital I/O (Standard)​​RS-232, RS-485​RS-232, RS-485
​Analog Connector​15-pin subminiature D​15-pin subminiature D
​Digital Connector​Dual RJ-12​Dual RJ-12
FittingsSurface Mount, Swagelok®, VCO, VCR, NPT
Surface Mount, Swagelok®, VCO, VCR, NPT
Power Requirements
11 - 36 VDC @ 3.1 Watt (max), Unipolar or Bipolar (e.g. + 15 VDC, + 12 VDC)11 - 36 VDC @ 3.1 Watt (max), Unipolar or Bipolar (e.g. + 15 VDC+ 12 VDC)
Wetted Materials​316L SS, Nickel 200, 304 SS, 302 SS​316L SS, Nickel 200, 304 SS, 302 SS, Kalrez® (Valve Seat)


Part Number​Description
​81-320​24 VDC Power Supply For Digital 300
​CB-RS232-RJ12​Digital Communication Serial Cable
​CB-USB-RS232​Serial Converter: USB to RS232 (DB9 Male)
Single Channel Controller​ / Display

12-01-16924 VDC Switching Power Supply for THCD-101
12-01-160AC Input Clip, US​
12-01-165AC Input Clip, UK
12-01-164AC Input Clip, Europe, China
Four Channel Power Supply / User Interface
65-5764 Feet Cable, H-pin out
(8', 25' and custom lengths available)
​65-440Mating Connector, 15-pin socket with backshell