Series DTFA Variable-Area Flowmeter for Gases

Economical, Aluminum Body, 5% FS Accuracy

The Series DTFA Variable-Area Flowmeter for Gases measures gas flow rates with ±5% of full-scale accuracy at an affordable price. Rugged aluminum construction ensures great compatibility and the strength to withstand system pressures of up to 3000 psig (200 bar). Available in either 1/4" or 1/2" NPT connections. Comes pre-calibrated for horizontal in-line mounting.

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Product Applications

  • Monitoring pressure drop across filters or strainers
  • Flow scale based on differential pressure
  • Liquid level given pressure differential between bottom and top of tank
  • Hydraulic equipment
  • Oil & gas equipment
  • Heat exchangers
  • Backflow prevention

Models & Ordering

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Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

COVID-19 Update: Due to high customer demand, lead time on some products may be up to two weeks. While this is a developing health situation, we are working continuously to take the necessary measures to ensure that the products you need are available with minimal interruption.

Model Description Usually Ships* Price Code Order
Ships: Same Day
Price: $312.00
Range 1.5-10 SCFM, 1/4" npt connection Same Day* $312.00 B Order
Ships: Consult Factory
Price: $312.00
Range 2.0-15 SCFM, 1/4" npt connection Consult Factory* $312.00 B Order
Ships: Consult Factory
Price: $312.00
Range 3.0-20 SCFM, 1/4" npt connection Consult Factory* $312.00 B Order
Ships: Consult Factory
Price: $312.00
Range 3.0-25 SCFM, 1/4" npt connection Consult Factory* $312.00 B Order


DTFW: Compatible liquids; DTFA: Compatible gases.
Wetted Materials:
Body: 316 SS, brass or aluminum; Spring: 302 SS or PTFEcoated; Range spring: 302 SS; Magnet: PTFE-coated; Metering cone: Acetal or PTFE; Seals: Buna.
Temperature Limits:
-40 to 200°F (-40 to 93°C).
Pressure Limit:
DTFW-3S: 1500 psig (100 bar); All other DTFW models: 3000 psig (200 bar); DTFA: 3000 psig (200 bar).
Liquid/oil calibration: ±2% FS; Air calibration: ±5% FS.
±1% FS.
Diameter dial face 2.5" (63.5 mm).
Process Connection:
See model chart on catalog page.
DTFW-1B and 1S: 3 lb (1.36 kg); DTFW-2B and 2S: 5 lb (2.27 kg); DTFW- 3S: 10 lb (4.54 kg); DTFA-1A: 3 lb (1.36 kg); DTFA-2A: 5 lb (2.27 kg).


  • Durable metal construction ensures great reliability and the strength to withstand system pressures of up to 3000 psig (200 bar)
  • Shatter proof construction, unlike glass tube variable area flowmeters, yields long operation life
  • Preform precisely in high temperature, high vibration, shock-prone environments

Product Literature


Catalog Pages


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