Series DFM Digital Flow Meter

Specifications

Service:

Clean, non-corrosive gases compatible with wetted parts.

Wetted Materials:

316 SS, 416 SS, high temperature polyamide, alumina ceramic, epoxy, silicone, glass, gold. FKM O-rings.

Accuracy:

±(0.5% of reading + 0.2% FS).

Repeatability:

±0.15% FS.

Response Time:

10 ms.

Output:

0-5 VDC, 0-10 VDC and 4-20 mA.

Relay Rating:

Programmable solid state relay.

Max. Particulate Size:

20 microns.

Temperature Limits:

14 to 140°F (-10 to 60°C).

Power Supply:

9-26 VDC.

Process Connections:

1/8" compression fitting for flow rates ≤ 10 L/min; 1/4" for ≤ 50 L/min; 3/8" for ≤ 100 L/min.

Display:

2 x 16 character OLED (model selectable).

Pressure Limits:

120 psig (8.27 bar).

Leak Integrity:

1 x 10-9 sccs of helium.

Weight:

DFM-01/50: 0.85 lbs (0.4 kg); DFM-51/56: 1.15 lbs (0.52 kg).

Compliance:

CE.

Features

• Quick (< 20ms) response time
• Multi-parameter functionality
• Multi-gas functionality
• Capable of storing up to 90 gases and 20 custom gas mixes
• Field configurable
• Modifiable outputs
• High, low or in-range alarms with preset action delay for mass flow, temperature and pressure

Approvals

• CE Approval
• RoHS Letter of Compliance

Drawings

• CAD Drawing in format .DWG
• Adobe Reader in format .PDF

Model Chart

     DFM-XX-X-XXXX      DFM DIGITAL MASS FLOWMETER

          1ST SYMBOL (1ST X) RANGE
             01    0-0.5 ML/MIN
             02    0-1 ML/MIN
             03    0-2 ML/MIN
             04    0-2.5 ML/MIN
             05    0-3 ML/MIN
             06    0-4 ML/MIN
             07    0-5 ML/MIN
             08    0-6 ML/MIN
             09    0-7 ML/MIN
             10    0-8 ML/MIN
             11    0-9 ML/MIN
             12    0-10 ML/MIN
             13    0-15 ML/MIN
             14    0-20 ML/MIN
             15    0-25 ML/MIN
             16    0-30 ML/MIN
             17    0-35 ML/MIN
             18    0-40 ML/MIN
             19    0-45 ML/MIN
             20    0-50 ML/MIN
             21    0-75 ML/MIN
             22    0-100 ML/MIN
             23    0-125 ML/MIN
             24    0-150 ML/MIN
             25    0-175 ML/MIN
             26    0-200 ML/MIN
             27    0-250 ML/MIN
             28    0-300 ML/MIN
             29    0-350 ML/MIN
             30    0-400 ML/MIN
             31    0-450 ML/MIN
             32    0-500 ML/MIN
             33    0-600 ML/MIN
             34    0-700 ML/MIN
             35    0-800 ML/MIN
             36    0-900 ML/MIN
             37    0-1000 ML/MIN
             38    0-1.5 L/MIN
             39    0-2 L/MIN
             40    0-2.5 L/MIN
             41    0-3 L/MIN
             42    0-4 L/MIN
             43    0-5 L/MIN
             44    0-6 L/MIN
             45    0-7 L/MIN
             46    0-8 L/MIN
             47    0-9 L/MIN
             48    0-10 L/MIN
             49    0-15 L/MIN
             50    0-20 L/MIN
             51    0-30 L/MIN
             52    0-40 L/MIN
             53    0-50 L/MIN
             54    0-60 L/MIN
             55    0-80 L/MIN
             56    0-100 L/MIN

          2ND SYMBOL (2ND X) BODY SIZE
             005   VERY LOW FLOW
             010   LOW FLOW
             050   MEDIUM FLOW
             100   HIGH FLOW

          3RD SYMBOL (3RD X) SEAL MATERIAL
             V     FLOUROELASTOMER (FKM)

          4TH SYMBOL (4TH X) FITTINGS
             A     1/8" COMPRESSION (VERY LOW/LOW)
             B     1/4" COMPRESSION (MEDIUM)
             D     3/8" COMPRESSION (HIGH)

          5TH SYMBOL (5TH X) DISPLAY
             N     NO DISPLAY
             L     LED DISPLAY

          6TH SYMBOL (6TH X) OUTPUT SIGNAL
             A     0-5 VDC

          7TH SYMBOL (7TH X) DIGITAL INTERFACE
             2     RS232 (RS485 SELECTABLE)
             3     RS232 WITH MODBUS (RS485 SELECTABLE)

Questions

Question

What is the k-factor?

Answer

The DFM/DFC have a built-in gas properties database for over 90 different gases and gas mixes. There is no need to use K-factors, which may have 5 to 10% error.

Related

Series DFC

Series DFM

Question

What is the turndown ratio?

Answer

200 to 1.

Related

Series DFM

Series DFC