Film Flowmeters

Features

• Primary standards
  
  
• Simple to use
  
  
• Sample contacts only glass and stainless steel
  
  
• Calibration lines encircle the tube for easy reading
  
  

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Principle of Operation

The operating principle of the SKC film flowmeter is simple: the sampling pump to be calibrated is attached to the top of a volumetric glass tube containing a small amount of liquid soap. As the pump draws air through the tube, a flat soap bubble is interposed in the flow path. While the air flow causes the soap film to move from one volume mark to another, the travel time is measured with a stopwatch. The flow rate can then be directly calculated using the travel time and the known tube volume, or it can be read from the flow chart. The test is quick and easy to perform. With a film flowmeter, flow rates are based upon the inherent, unchanging properties of the measuring apparatus.

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Model 303 Portable Flowmeter Kit
Range: 5 to 500 ml/min

The SKC 303 Portable Flowmeter Kit contains all of the equipment, except a stopwatch, required for calibrating low flow personal sample pumps and detector tube pumps. The complete kit weighs only 3 pounds (1.4 kg) and includes a 100 ml buret flowmeter, film solution, operating instructions, flow charts, and a removable carry case. Calibration lines for 90, 95, 105, and 110 ml are also on the buret allowing for the calibration of detector tube pumps

303 Flowmeter		Pump Calibration Train with 303 Flowmeter

Model 303 Operating Instructions (PDF)
Instrucciones de Operación Catálogo No. 303 (PDF)

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Model 311 Laboratory Film Flowmeter Kit
Range: 300 to 3000 ml/min

311 Flowmeter		Closeup of 311 Flowmeter side arm for pressure sources

The SKC 311 Laboratory Film Flowmeter Kit consists of a glass tube with red calibration lines at specified volumes, a squeeze bulb to contain sufficient soap film solution for flow measurement, an adapter to accommodate either vacuum or pressure sources, a stopper and connecting tubing, a tripod stand, film solution, and operating instructions. The SKC 311 Laboratory Film Flowmeter Kit provides quick and accurate flow determinations at specified flow rates.

Model 311 Operating Instructions (PDF)
Instrucciones de Operación Catálogo No. 311 Series (PDF)

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About Built-in Flowmeters and Rotameters
The ball-type flowmeters and rotameters built into most air sampling pumps are primarily intended to serve as flow indicators and are, therefore, of low accuracy. These flowmeters as well as rotameters must be calibrated against a primary standard such as a film flowmeter or electronic calibrator (Defender) to verify accuracy.

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Precision Digital Stopwatch
An accurate timer is required with a film calibrator. The SKC stopwatch is a rugged, hand-held digital stopwatch with high-precision quartz crystal movement and solid-state circuitry powered by three AA alkaline batteries. The digital readout is to 1/100 second with a total elapsed time of 60 minutes.

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        Ordering Information           Online Ordering

Calibrator Size/Description		Cat. No.
Portable Flowmeter Kit, 5 to 500 ml/min flowrange includes precision glass buret, film solution, operating instructions, and carry case		303
Laboratory Film Flowmeter Kit, 300 to 3000 ml/min flowrange includes precision glass buret, film solution, operating instructions, adapter for vacuum or pressure, and aluminum tripod stand		311-1000
Calibrating Accessories		Cat. No.
Film Solution,1 pint (473 ml)		302-4011
Precision Digital Stopwatch Precision quartz crystal movement, digital readout to 1/100 second, powered by 3 AA batteries		303-01-1

Tubing Page

Soap Film Flowmeters Spec. Sheet (PDF)

Model 303 Operating Instructions (PDF)

Instrucciones de Operación Catálogo No. 303 (PDF)

Model 311 Operating Instructions (PDF)

Instrucciones de Operación Catálogo No. 311 Series (PDF)

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This page was last modified April 20, 2009