Matheson’s FM-1050 Series Flowmeters provide the most accurate indication and precise control of fluids available for a wide range of applications. This versatile meter is functionally and dimensionally interchangeable with other current designs while incorporating many innovative features.

All FM-1050 Series glass metering tubes have integral float guides to ensure a guaranteed ±5% of full scale accuracy.  These meters have direct read scales for argon at 0 psi.

Standard with this series is the uniquely designed Tube-Cube®. The “cube,” a unitized tube holder, aligns the tube quickly and easily for simple tube installation or replacement. The Tube-Cube® provides protection during handling, reducing chipped tube ends, broken tubes and misalignment. The 1.5 X scale magnification lens allows for a more accurate reading. End seals in the FM-1050 are direct acting and nonrotating for fast alignment and convenient service access.

Valve Options
• Utility (six-turn) valve for those who desire control as well as indication
• High accuracy (fifteen-turn) valve, for very precise control and repeatability
• No valve for those who just want indication

Applications

Typical applications include:
• Flow measurement of purge gases
• General laboratory or instrument flow monitoring
• Flow measurement of calibration standards used in environmental monitoring

Design Features

• Precision tapered, fluted metering tube
• Low pressure drop for increased available flow rates at low feed pressures
• Standard front panel mounting requires minimum hardware -easy installation, quick access
• Available utility and high precision metering valves do not require special fittings
• Simplified, direct acting, nonrotating compression plug for quick and easy tube sealing

Materials of Construction

• Wetted End Blocks, Fittings and Internal Parts: 316 stainless steel
• Seal Materials: Viton
• Side Plates: Painted aluminum
• Metering Tube: Borosilicate glass enclosed in Tube-Cube® holder
• Piping Connections: 316 stainless steel
• Float Materials: Black glass and 316 stainless steel
• Scale: Ceramic ink on glass tube, length 150mm

Accuracy

• Accuracy: ±5% of full scale flow rate
• Repeatability: 0.25% of scale reading

Specifications

• Pressure Rating: 250 psi maximum
• Temperature Rating: -20°F to 250°F
• Range: 10 to 1, i.e., 100% to 10% of full scale
• Shipping Weight: 1 lb

Correction Factors

Rotameter Pressure Correction Factors

Rotameter Temperature Correction Factors

Rotameter Gas Correction Factors

Instructions

Instructions, FM-1000/FM-1050

Engineering Drawings

Engineering Drawings, Rotameters

3D Model

FM-1050