ULTRAC PMS Pressure Measuring Stations
Applications
ULTRATECH ULTRAC Pressure Measuring Stations (PMS) provide accurate, repeatable measurement of the average static pressure in ducts and piping. These devices are particularly applicable to the HVAC trade because of their lightweight, rugged construction; ease of installation; and economical pricing. Durable, quality construction ensures long-term, trouble-free operation.
When used for controlling the supply fan, these ULTRAC stations ensure constant static pressure in variable air volume systems. They are compatible with manometers, differential pressure gauges, and differential pressure transmitters used for pressure indication and control.
Description
ULTRAC Pressure Measuring Stations use multiple averaging statics to determine static pressure measurements. The static sensors are placed across the flow stream according to industry standards for equal-area averaging (the standard Pitot traverse). ULTRAC's simplified PMS construction eliminates non-essential hardware that can cause build-up of dirt and foreign matter on the measuring assembly.
ULTRAC Pressure Measurement Stations are available in round, rectangular and oval configurations. All configurations feature a rigid sensor assembly that allows for duct expansion and contraction. The 12-inch flanged steel casing has an aluminum, hexagon-celled straightening vane section that is mechanically fastened to the inlet. This eliminates turbulence and corrects flow direction, thereby improving the velocity profile.
Various casing and sensor designs are available, as are most types of proprietary duct connecting systems. Please contact ULTRATECH about these options.
Suggested Specifications
Pressure measuring stations shall be of the multiple averaging static pressure sensor type, with all static pressure sensors distributed for equal-area averaging of pressure. They shall be of unitary (spool-piece) construction, of not less than 16-gauge sheet steel with flanged duct connections. Flow-straightening vanes shall be incorporated into the structure. Internal static sensors shall be constructed of copper to ASTM B88 standards. Instrument connections shall be 1/2" NPT Female. Mounting hardware shall not penetrate the sensor assembly.
The pressure measuring stations shall be ULTRAC PMS, as manufactured by ULTRATECH INDUSTRIES, INC., Garner, NC, U.S.A.
Specifications for Standard Units
ACCURACY: +/-1% to 6000 feet per minute TEMPERATURE: Maximum operating 400°F PRESSURE: Maximum operating, 6-in. w.c. PRESSURE DROP: Less than 0.07 in. w.c. at 2000 feet per minute with 3/4" cell FLOW STRENGTHENING VANES: 3/4" aluminum hexagon cell MAXIMUM DESIGN FLOW: 6000 ft./min. CASING: 16-gauge galvanized sheet metal Length: 12-in. overall PITOT AND STATIC SENSORS: rigid copper, hard drawn, to ANSI H 23.1 and ASTM B88 standards INTERNAL FITTINGS: copper, to ANSI B16.22 standards PROCESS CONNECTIONS: 1/2-in. NPT Female
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