While many variables affect flow, nothing should affect its accurate measurement.

Inline Thermal Mass Flow Meter Features

• Unobstructed Path

• 100:1 Turndown range (1000:1 Application dependent)

• Repeatable rates within +- .2%

• Low Pressure drop

• Mass Flow Measurement

• Stainless Steel Material Standard

Contact Thermal Instrument Co.

HOW DO OUR FLOW METERS WORK?

Our In-line Thermal Mass Flow meter Model 600-9, employs a unique design where the RTD sensors are mounted to the outer circumference of a pipe or tube in order to keep the sensors from coming into contact with the fluid passing throughMass Flow Meter with unobstructed flow thru design virtually eliminating pressure drop in both liquid and gas processing applications. the instrument. This unique design allows for a fully unobstructed flow path and negligible pressure drop to your process application.

SENSORS

Our flow measurement instruments use two RTD sensors: one is self-heated and measures the flow and the other one measures the media temperature. The temperature sensor measures the heat of the media passing by and instantly corrects for changes in temperature. It then sets the temperature of the flow sensor to a precise temperature above that of the passing media.  

METER ACCURACY

The accuracy of the flow measurement is based on the fact that all media conduct heat off the sensor in direct proportion to the mass flow rate. The higher the velocity in flow, the more heat is conducted away and therefore creating a repeatable relationship. Accurate flow readings can be measured on a process line as small as 1/16" (1.59mm) in diameter; there’s no limit on maximum size.

There are two components that make up a Thermal Instrument inline mass flow meter: a flow element with a bridge controller and a signal transmitter. We offer our transmitter in both an integral and remote mount configuration allowing for a variety of installation options. Operational Flow display, Totalized Flow, Pulse Output, and Temperature outputs are available options. Our unique in-line design of our thermal mass flow meters offer no obstruction to the actual flow path allowing for excellent flow profiles and in turn, accurate and repeatable results.

PROCESS CONNECTION & MATERIAL OPTIONS

Spools are available with flanged, threaded, sanitary, VCR, VCO, Swagelok® or other constructions suitable to your system. Our Thermal Mass Flow Meters are manufactured using 316 SS as a standard, but corrosion resistant materials such as Hastelloy C, Monel, Inconel, Tantalum, and Carpenter 20 are also available.  In addition, our Thermal Mass Flow Meters are available in a variety of protective coatings including: Carbide, Fluorocarbon , Teflon, and Sulfinert.

SANITARY & ULTRAPURE OPTIONS FOR GAS AND LIQUID FLOW MEASUREMENT

These Thermal Instrument inline models are constructed of 316L, low sulfur stainless steel down to 10-15 RA finish and offer “CIP/SIP” clean-in-place design.  These models provide sanitary measurement options for our clients in the Food & Beverage, Pharmaceutical, and Semi-conductor industries to name a few. We offer a variety of cleaning options with avaliable certificates if necessary. They are available with our standard Tri-Clamp process connection, but also can be manufactured with VCR, VCO, or even tube end construction to meet a variety of process connection configurations. They also provide highly reliable service in flow switch applications with field adjustable Form C relay switch points.

These units are available with both integral and remote transmitter styles for outputting flow rates and temperature. 

Dimensional Drawings

Click for a printable PDF

Inline thermal mass flow meter sizing chart

 

Inline Flow Meter Specification Chart

ENGINEERING SPECIFICATIONS ENVIRONMENTAL RATINGS
   
Accuracy: +/- .50% of Full Scale, [or 2.0% of reading whichever is better. Full Scale over the calibrated range. [Process fluid temperature span +/- 50°F] Housing: Explosion Proof, Class 1, Div. 1, Groups, B, C, D Weatherproof, Nema 4
   
Repeatability: +/- 0.2 % of Rate Ambient Temperature: -25°C to 60°C (-13°F to 140°F)
   
Response Time: Storage Temperature: -40°C to 70°C (-40°F to 158°F)
Gases: 1 to 2 sec. Typical / Worst case could be 4 to 8 seconds  
Liquids: Less than 500ms Mounting:
  Integral to the Flow Transducer
Pressure Rating: Remote to 4000 ft., Wall or Frame mount
0 - 1200 psig (Std)  
0 - 10000 psig Dependent on meter size Signal Cable for Remote Design: 18 gauge, 2 pair with cable shield. Maximum distance, 4000 ft.

Calibration Temperature Capability: -20°F to 800°F(-29°C to 538°C)

 
Mass Flow Rates: MODEL NUMBERING SYSTEM:
Gases, Liquids: Consult factory for your application. Base Model: = 9500
Note: maximum determined by pipe capacity In-Line: = 600-9/9500
  Temperature Output: = 600-9/9500
Flow Range: 1OO:1 Capability (1000:1 Application dependent) Electronics Mounting
  I = Integral Mount
Wetted Materials: 316SS (STD). Consult factory for other material requirements R = In-Line , Remote Mount
   
Pressure Drop Typically: Same as equivalent size and length tube or pipe Size: 1/4'’ to 12”
   
Connections: Flange, Tube Fittings, Sanitary, Welded, NPT, VCR, and VCO. Others available upon request. Material:
  316SS = STD
MICRO-CONTROLLER SPECIFICATIONS: Hastelloy B & C, Tantulum, Inconel, Titanium, and Nickel are also available
  Protective Coatings Available: Carbide, Fluorocarbon , Teflon, and Sulfinert
16 BIT A/D DESIGN INTERIOR FINISH TYPE:
  IND = Industrial
Displays: 8 digit Flowrate and Totalizer (Optional) SAN= Sanitary
  UHP=Ultra High Pure
Communicator:  
  Process Connection:
Interface: RS-232 via Ribbon Connector STB = Stub End for User Fitting.(STD.)
Baud Rate: 9600 TBE = Tube Fitting (STD.)
  WLD = Weld End (STD.)
Adjustable Variables with RS-232 Communicator: NPT = MNPT (STD.)
Zero Cutoff; Zero Offset FLG-150 = 150# RF Flange (STD.)
Digital Filter Factor (damping 0 to 32 minutes) FLG-OTHER = Consult Factory
Flow Full Scale OTHER = Consult Factory
Flow Rate Decimal Point  
Flow Totalizer Decimal Point Power:
Flow Totalizer/Flowrate Ratio 24 = 22-26 VDC, 1 AMP. 4 WIRE
  120 = 120VAC, 1/2 AMP, 50/60 HZ (STD.)
Power: 120/240 vat, 50/60 Hz, 20 Watts 240 = 240VAC 50/60 HZ
24VDC, 1 Amp (factory set)  
  Output Signals:
Electrical Connections: 3/4 ” FNPT Power & Signal (Select One**)
  0/5 = 0-5 VDC**
Enclosure: Cast Aluminum, Epoxy Painted 0/10 = 0-10 VDC**
  4/20 = 4-20 mADC** into 750 ohms, Isolated std, Self Powered
  4/20T = Opt Process Fluid Temp. 4-20mA Self Powered
  Other = Consult Factory
   
  Display: (Optional)
  ND = No Display
  D = Flowrate Display, 8 Digit
  8T = Totalizer
  D/8T = Flowrate and Total Display, 8 digit
   
  Signal Cable for Remote Design: SC25 = 25 FT Supplied with remote configuration

 

Inline Flow Meter Ultra-High Purity (UHP) Sizing Chart

Size
OD - ID
Gas Min
SCFM
Max
SCFM
Liquid Min
GPM
Max
GPM
¼ x 0.18 Air, N2,O2, H2, He, Silane, Argon* 0.07 7 Ranges for water and similar viscosity liquids.


Capabilities:
Acids
Hydrocarbons
Slurries
TO 5000 CP
Viscosity
0.001 0.5
⅜ x 0.305 0.53 150 0.010 1
½ x 0.402 0.80 200 0.050 5
¾ x 0.62 1.40 300 0.200 10
1.0 x 0.87 2.50 400 1.000 30
1.5 x 1.37 4.50 650 1.500 60
2.0 x 1.87 7.00 1000 1.640 75
3 10.60 1500 3.000 150
4 15.00 2000 4.000 300
> 4" - Contact Thermal Instrument Company
* Contact Thermal Instrument Company for this application

 

Inline Flow Meter Gas Sizing Chart

Pipe Size (In.) N/A N/A N/A 3/8" 1/2" 3/4" 1" N/A 1.5" N/A 2" 3" 4" 6"
Tube Size (In.) 1/4" x 1/16" 1/4" x 1/8" 3/8" x 1/4" 1/2" x 3/8" 3/4" x 1/2" 1" N/A 1.5" N/A 2" N/A 3" 4" 6"
I.D. (IN.) 0.06 0.12 0.245 0.37 0.62 0.87 1.043 1.37 1.61 1.87 2.067 2.87 3.87 Call

Measureable Flow - SCFM

(Transition Flow)

Min-Max Min-Max Min-Max Min-Max Min-Max Min-Max Min-Max Min-Max Min-Max Min-Max Min-Max Min-Max Min-Max
AIR .01-10 .07-30 .25-150 .80-200 2-300 2.0-400 3.0-400 7-700 7-700 10-1000 10-1000 12-1500 20-2000
[.07-.18] [.14-.36] [.30-.74] [.80-1.1] [2.0-2.5]            
AMMONIA .01-10 .07-40 .25-150 .80-200 1.0-300 2.0-400 2.0-400 4-700 4-700 6-1000 6-1000 12-1500 15-2000
[.07-.18] [.14-.36] [.30-.74] [.80-1.1] [1.0-2.0] [2.0-2.5]            
ARGON .025-5 .07-10 .50-100 1.0-150 2.0-200 4.0-300 5.0-350 9-450 9-500 12-800 12-900 20-1200 100-1600
[.07-.18] [.14-.36]            
BUTANE .01-15 .07-40 .25-150 .80-200 1.0-300 2.0-400 2.0-400 4-700 4-700 6-1000 6-1000 12-1500 15-2000
[.02-.04]            
CARBON MONOXIDE .01-10 .07-30 .25-150 .80-200 2.0-300 2.0-400 3.0-400 7-700 7-700 10-1000 10-1000 12-1500 20-2000
[.07-.17] [.14-.35] [.25-.28]            
CARBON DIOXIDE .01-10 .07-30 .25-150 .80-200 2.0-300 2.0-400 03.0-400 7-700 7-700 10-1000 10-1000 12-1500 20-2000
[.04-.10] [.08-.21] [.25-.43]            
CHLORINE .025-5.0 .07-10 .50-100 1.0-150 2.0-300 4.0-300 5.0-350 9-450 9-500 12-800 12-900 20-1200 100-1600
[.27-.64] [1.05-2.6] [.50-2.6] [1.0-4.0] [9-14.7] [9-18.5] [12-20] [12-22] [20-31]
ETHANE .010-15 .07-40 .25-150 .80-200 1.0-300 2.0-400 2.0-400 4-700 4-700 6-1000 6-1000 12-1500 15-2000
[.04-.09] [.07-.18] [.25-.37] [.80-1.0]            
FLUORINE .025-5.0 .07-10 .50-100 1.0-150 2.0-200 4.0-300 5.0-350 9-450 9-500 12-800 12-900 20-1200 100-1600
[.07-.18] [.10-.35] [.50-.72]            
*FREON12 .025-5.0 .07-10 .50-100 1.0-150 2.0-200 4.0-300 5.0-350 9-450 9-500 12-800 12-900 20-1200 100-1600
[.03-.07][ [4.0-9.5]            
HELIUM .01-15 .07-40 .25-150 .80-200 1.0-300 2.0-400 2.0-400 7-700 7-700 6-1000 6-1000 12-1500 15-2000
[.62-1.5] [1.2-3.1] [2.5-6.0] [4.0-9.5] [6.0-15.0] [9.0-22.0] [10.7-27] [14-35] [16-41] [19-47] [21-53] [29-73] [40-100]
HYDROGEN .01-15 .07-40 .25-150 .80-200 1.0-300 2.0-400 2.0-400 7-700 7-700 12-1000 10-1000 12-1500 20-2000
[.53-1.3] [1.1-2.7] [2.5-6] [3.4-8.5] [5.5-14] [2.0-8.0] [9.2-23] [12-31] [14-36] [17-42] [18-46] [26-65] [35-87]
HYDROGEN SULFIDE .025-5.0 .07-10 .50-100 1.0-150 2.0-200 4.0-300 5.0-350 9-450 9-500 12-800 12-900 20-1200 100-1600
[.06-.15] [.12-.30] [.50-.60]            
HYDROGEN CHLORIDE .025-5.0 .07-10 .50-100 1.0-150 2.0-200 4.0-300 5.0-350 9-450 9-500 12-800 12-900 20-1200 100-1600
[.06-.15] [.07-.09] [.50-.60]            
METHANE .01-15 .07-40 .25-150 .80-200 1.0-300 2.0-400 2.0-400 4-700 4-700 6-1000 6-1000 12-1500 15-2000
[.08-.20] [.16-.41] [.25-.85] [.80-1.3] [1.0-2.0] [2.0-3.0] [2.0-3.5]            
NATURAL GAS (.6) .01-15 .07-40 .25-150 .80-200 1.0-300 2.0-400 2.0-400 4-700 4-700 6-1000 6-1000 12-1500 15-2000
[.08-.2] [.16-.39] [.25-.81] [.80-1.24] [1.7-2.0] [2.0-2.8] [2.0-3.3]            
NITROUS OXIDE .025-5.0 .07-10 .50-100 1.0-150 2.0-200 4.0-300 5.0-350 7-700 7-700 10-1000 10-1000 12-1500 20-2000
[.04-.10] [.02-.21]            
NITROGEN .01-10 .07-30 .25-150 .80-200 2.0-300 2.0-400 3.0-400 7-700 7-700 10-1000 10-1000 12-1500 20-2000
[.07-.19] [.15-.37] [.3-.75] [.80-1.0] [2.0-3.0]            
OXYGEN .01-10 .07-30 .25-150 .80-200 2.0-300 2.0-400 3.0-400 7-700 7-700 10-1000 10-1000 12-1500 20-2000
[.08-.20] [.16-.39] [.32-.80] [.80-1.2] [2.0-3.0]            
PROPANE .01-15 .07-40 .25-150 .80-200 1.0-300 2.0-400 2.0-400 4-700 4-700 6-1000 6-1000 12-1500 15-2000
[.01-.02] [.07-.10]            
SULFUR DIOXIDE .025-15 .04-10 .50-100 1.0-150 2.0-200 4.0-300 5.0-350 9-450 9-500 12-800 12-900 20-1200 100-1600
[.06-.14] [.11-.28] [.50-.55]          

Inline Flow Meter Liquid Sizing Chart

Flow Units GPM LPM (ML/Min.) * PPM (GR/ Min.)**
Size   ID Min Max Transition Flow Min Max Transition Flow Min Max Transition Flow
1/4 x 1/16 Tube 0.06 0.00002 0.0025 LAMINAR .076* 9.46* LAMINAR .08** 9.5** LAMINAR
1/4 x 1/8 Tube 0.12 0.0001 0.35 [.08-.19] .379* 1325* [288-720]* .3** 1325** [286-726]**
3/8 x 1/4 Tube 0.245 0.03 3 [0.1-.39] 0.114 11.4 [.59-1.47] 0.25 25 [1.3-3.3]**
1/2-3/8 Tube 0.37 0.05 5 [.17-.42] 0.19 19 [.64-1.6] 0.42 42 [1.4-3.5]
3/4 x 1/2 Tube 0.62 .1 10 [.40-1.0] .40 38 [1.5-3.8] .8 83 [3.3-8.3]
1/2 Pipe 0.622 .2 15 [.40-1.0] .75 56.8 [1.5-3.8] 1.6 125 [3.3-8.3]
3/4 Pipe 0.824 .25 31 [.50-1.3] .95 117.3 [2.0-5.0] 2.0 259 [4.2-10.8]
1 Tube/Pipe 1.0/.5 .3 41.0/41.0 [1.0-1.65] 1.1 155.2 [3.8-6.2] 2.5 342 [8.3-13.0]
1.5 Tube 1.37 .75 65 [1.25-2.2] 2.8 246 [4.7-8.3] 6.0 542 [10.4-18.4]
1.5 Pipe 1.61 1.0 80 [1.5-2.6] 3.5 303 [5.7-9.8] 8.0 668 [12.5-21.7]
2 Tube/Pipe 1.87/2.067 1.5/1.5 100/150 [1.5-3.3] 5.7 379 [5.7-12.5] b 834 [12.5-21.7]
3 Tube/Pipe 2.87/3.068 3 200 [3.0-4.9] 11.4 757 [11.4-18.5] 25 1670 [25-41]
4 Pipe 4.026 4 400 [4.0-6.4] 15 2650 [15-24.2] 33.4 3340 [33.4-53]
Contact Thermal Instrument Company > 4" - 215-355-8400
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