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  4. Flowmeters

Aluminium Mass flowmeter, model GFM37A

Reference: GFM37A-ABCD-EF-PLYN-PRUTOK

Mass flow meter Compact, self-contained GFM mass flow meters are designed to read flow rates of gases. The rugged design coupled with instrumentation grade accuracy provides versatile and economical means of flow measurement.

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Product description

Product description

Mass flow meter

Compact, self-contained GFM mass flow meters are designed to read flow rates of gases. The rugged design coupled with instrumentation grade accuracy provides versatile and economical means of flow measurement. Aluminum or stainless steel models with readout options of either engineering units (standard) or 0 to 100 percent displays are available.

Design features

  • Rigid metallic construction
  • Maximum pressure of 34,5 bar (optimum 1,4 bar)
  • Leak integrity 1 × 10–9 of helium
  • NIST traceable certification
  • Built-in tiltable LCD readout
  • 0–5 Vdc and 4–20 mA signals
  • Circuit protection
  • Can be used as a portable device
  • Engineering units or 0 to 100% displays
  • TIO Totalizer option
Parameters

Parameters

Brand: GFM
Category: Measurement and control / Gas measurement / Flowmeters

Technical parameters

ACCURACY GFM 17, 37 and 47: ±1.0% of full scale
GFM 57, 67 and 77: ±1.5% of full scale. OPTIONAL ENHANCED ACCURACY: ±1.0% of full scale
CALIBRATIONS Performed at standard conditions [14.7 psia (101.4 kPa) and 70 °F (21.1 °C)] unless otherwise requested
REPEATABILITY ±0.25% of full scale
RESPONSE TIME Generally 2 seconds to within ±2% of actual flow rate over 25 to 100% of full scale.
TEMPERATURE COEFFICIENT 0.15% of full scale / °C
PRESSURE COEFFICIENT 0.01% of full scale / psi (0.07 bar)
GAS and AMBIENT TEMP. 32 °F to 122 °F (0 °C to 50 °C). 14 °F to 122 °F (-10 °C to 50 °C) – Dry gases only
OUTPUT SIGNALS Linear 0–5 Vdc. 1000 ohms min. load impedance and 4–20 mA 0–500 Ohms loop resistance
TRANSDUCER INPUT POWER Universal +12 to +26 VDC, 200 mA maximum
TIME CONSTANT 800 ms
GAS PRESSURE: 1000 psig (70 bars) maximum GFM 17, 37, 47. 20 psig (1.4 bars) optimum
500 psig (34.5 bars) GFM 57, 67, 77. 20 psig (1.4 bars) optimum
MATERIALS IN FLUID CONTACT a. Aluminum models GFM Series: anodized aluminum, 316 stainless steel, brass and Viton® O-rings
b. Stainless steel models GFM17S, 37S,47S, 57S, 67S and 77S: 316 stainless steel and Viton O-rings
Optional O-rings: Buna , EPR and Kalrez
ATTITUDE SENSITIVITY No greater than +15 degree rotation from horizontal to vertical; standard calibration is in horizontal position
CONNECTIONS GFC 17: 1/4" compression fittings. Optional: 6mm, 3/8" and 1/8" compression fittings or 1/4" VCR
GFC 37: 1/4" compression fittings. Optional: 6mm and 3/8" compression fittings or 1/4" VCR
GFM 47: 3/8" compression fittings
GFM 57: 3/8" compression fittings
GFM 67: 1/2" compression fittings
GFM 77: 3/4" FNPT fittings or 3/4" compression fittings
LEAK INTEGRITY 1 × 10–9 smL/sec of helium maximum to the outside environment
CE COMPLIANT EN 55011 class 1, class B; EN50082–1

Use

MediumPlyn
Max. flowrate50l/min

Operating conditions

Analogue outputna výběr
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