Matheson's PM-1000 Series acrylic flowmeters are a practical, low-cost approach to low flow rate indication of gases. A broad range of industrial applications involving non-corrosive fluids, normal atmospheres and less stringent accuracy demands are within the scope of this simplified, plain tapered tube design. State-of-the-art manufacturing techniques ensure each meter meets the performance demands of these applications. The PM-1000 Series are direct reading for air, and are available in either English or Metric units. Choose between a black glass or stainless steel float. Complete annealing during production ensures each meter body is stress free. No plastic threading is used, eliminating crazing and fracture of the acrylic. An extruded aluminum support frame for the meter body absorbs all connection strain. Support frame flanges and lock nuts provide for a variety of panel mounting arrangements. The simplified design of this meter allows quick, easy maintenance. High impact strength of the acrylic meter block completes this dependable design.

Valve Options
• Utility valve for those who desire control as well as indication
• No valve for those who just want indication

*All air flow rates at 70°F and 14.7 psia

Design Features

• Reduced scale parallax
• 37mm scale length
• Low end flow measurement of 0.2 SCFH
• 10 to 1 or greater meter range
• Low pressure drop
• Meter support frame flanges allow variety of panel mounting positions

Materials of Construction

• Wetted End Plugs and Valve Parts: 316 stainless Steel
• Seal Materials: Viton
• Valve Stem: 316 stainless steel
• Meter Block: Clear, cast acrylic plastic with plain tapered bore
• Piping Connections: 316 stainless steel
• Float Material: Black glass or 316 stainless steel
• Scale: Permanently screened on meter body, length 37 mm

Specifications

• Pressure Rating: 100 psi maximum
• Temperature Rating: 160°F maximum
• Accuracy: ±10% of full scale flow rate
• Repeatability: 1% of scale reading
• Range: 10 to 1, i.e., 100% to 10% of full scale
• Scale Readings: Direct reading (air)
• Shipping Weight: 1 lb

Correction Factors

Rotameter Pressure Correction Factors

Rotameter Temperature Correction Factors

Rotameter Gas Correction Factors

Instructions

Instructions, PM-1000/PG-1000

Engineering Drawings

Engineering Drawings, Rotameters

3D Model

PM-1000