Model 869 Ultra Low Pressure Calibrator from Setra Systems

The Model 869 from Setra is a total solution for low pressure calibration.  Designed by one of the larger manufacturers of draft-range pressure transmitters, the unit includes two NIST-traceable high-accuracy measurement standards as well as fully-automated pressure control and automated reading of voltage and current signals from any companies DP transmitters.  The unit includes an HP Ipaq handheld PC that runs the calibrator.  Selling for less than $10,000, the 869 is the ideal solution for those difficult-to-calibrate 0.25" and 0.5" transmitters where stable control is critical.

	Accuracy of 0.04% of full scale
	Ranges available: 0.25" to 15" H20
	Each unit has dual ranges
	Automated Control
	Reads voltage and current
	Multiple engineering units
	Includes rechargeable batteries

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Data Sheet in PDF format  

DPI610LP Low Pressure Calibrator from Druck

The The GE Druck DPI 610LP / 615LP pressure calibrators incorporate a precision low pressure sensor and pneumatic generation to provide a fully self-contained and portable low pressure calibrator.  The GE Druck DPI 610LP pressure calibrator has data storage and RS232 interface. Data can be transferred directly from the GE Druck DPI 610LP pressure calibrator to a computer for analysis, certificate printing, and archiving. The GE Druck DPI 615LP pressure calibrator simplifies field use by calculating the device under test error and the pass/fail status, and then integrates this information with calibration management software systems such as Intecal.

	Accuracy of 0.05% of span
	Ranges from 1" H20 to 60" H20 full scale
	Dual display of pressure, mA and volts
	Pressure control AND measurement
	Data storage

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Data Sheet in PDF format  

ATE-100 Handheld Digital Calibrator from Ashcroft

The Ashcroft® ATE-100 has set a new standard for precision pressure test and measurement instrumentation. Interchangeable pressure modules give the ATE incredible versatility. It is extremely popular for low-pressure measurement, with modules available in 0.25, 0.5, 1.0, 2.0, 5.0, 10, 15, 100 and 150 inches H20 full scale.  Accuracy is an industry-leading +/-0.06% of the full scale range selected. Bidirectional ranges available as well (+/-0.25", +/-0.5", etc). Quick Select® interface modules add temperature measurement with RTDs or thermocouples, while on-board jacks provide measurement of voltage and current (mA). Two sensor bays and a twin LCD provide simultaneous display of any two measurements

	Interchangeable pressure modules
	0.25" H20 to 10,000 psi
	Accuracy of +/-0.025, .06 and 0.1%
	Datalogging and cert generation
	Includes test leads, AC adapter and NIST certificate
	Ideal handheld meter with the FCO501 supply unit shown below.

Data Sheet in PDF format  

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FCO501 Low Pressure Supply Unit from Furness Controls

One of our most popular products sold. The FCO501 was designed as an accessory for setting very stable, low pressures to a device under test AND a standard for calibration purposes.  Using micrometering valves and the on-board pump, the FCO501 can set pressures as low as 0.0002 inches of water with stability to 5 decimal places!  This is the only manually-operated device sold today that provides stable pressures for testing draft pressure transducers and transmitters.  A constant flow is supplied to the two valves, allowing coarse and fine pressure adjustment. The FCO501 is the ideal low pressure calibration tool for the calibration lab or instrument shop.

	Sets pressures from 0.0002 inches H20 to 80 inches H20
	Pneumatic connections for both standard and device under test
	Coarse and fine pressure control
	Includes internal pump
	Flow-based system
	Low-cost

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PPC500 Low Pressure Calibrator from Furness Controls

The PPC500 is the ideal calibrator for those low inches-of-water transmitters and gauges. Two ranges are available on each PPC500. Transmitters can be powered and the voltage/current displayed directly on the PPC500 front panel. Calibration data can be logged to internal memory for later retrieval. The included RS232 port allows data to be downloaded to a PC or the PPC500 can be integrated into an automated test system.

	Accuracy of +/-0.1% of reading
	Model 1 covers 0.0008" H20 to 8" H20
	Model 2 covers 0.008" H20 to 80" H20
	DC power supply and voltage/current display
	Data-logging for paperless calibrations.
	Rechargeable battery or AC operation

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LPC Low-Pressure Automatic Controller/Calibrator from United Instruments

The LPC from United Instruments provides both a NIST-traceable measurement standard for difficult inches-of-water ranges as well as a fully automatic controller, which can set stable pressures to +/-0.003 "H20!.  All in a compact, portable package.   Type in your desired pressure using the membrane keypad and hit the ENTER button and the pressure is automatically set and stabilized, using precision servo-actuated pistons. A full profile of up to 99 points can be entered into the LPC for automated multi-point testing.

	Accuracy of +/-0.035% of full scale
	Ranges of +/-10, +/-30 and +/-150 inches water
	Fully automatic control

	Gauge or Differential Pressures
	Small and portable
	Rechargeable battery
	RS232 interface is standard
	Cost under $5000

Data Sheet in PDF format  

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PPC3 Pressure Controller/Calibrator from DH Instruments

The PPC3 is a third generation product that extends the limits of both measurement and control capabilities.   A special PPC3 design for calibration of inches-of-water differential devices offers +/-0.008% of READING accuracy from +/-5 to +/-60 inches of water.  True bi-directional control allows calibration through zero differential without changing modes of the controller.

When ordered for inches-of-water operation, the PPC3 is supplied with a Dual Volume Unit, which contains two thermally insulated volumes that improve the control precision at low pressures and isolate the test system from changes in ambient conditions. Control precision of 0.001% of autoranged span allows excellent control even down in the fractional inches-of-water ranges.

	Accuracy of +/-0.008% of reading
	Range of +/-60 inches-of-water
	Fully automatic control

	True bi-directional operation
	RS232 and IEEE-488 standard

Data Sheet in PDF format  

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FPG8601 Force Balanced Piston Gauge from DH Instruments

The FPG8601 addresses the need for traceable measurements with very low uncertainty in the range below standard piston gauges and deadweights testers.  The FPG8601 is designed for calibration of Capacitance Diaphragm Gauges (CDGs) such as the MKS Barotron and Edwards/Datametrics Barocell (in both differential, gauge AND absolute modes) as well as the critical low inches-of-water ranges that are not covered well by traditional primary pressure standards.  Included with the system is an automated pressure control device that can be used for automatically running multi-point test sequences on any test device with an analog, RS232 or IEEE output.

	Uncertainty of +/-0.003% + 0.02 Pa
	Range of 0 to 15 kPa (2.2 psi, 112 torr, 60" H20)
	Calibrates ranges down to 100 mtorr, 0.1" H20
	Supports absolute, gauge and differential calibrations
	System includes full automation software
	System includes automated pressure controller

Data Sheet in PDF format  

TECHNICAL PAPERS (PDF Format):

1. "A Forced Balance Piston Gauge for Very Low Gauge and Absolute Pressures"  Authors: Pierre Delajoud, Martin Girard

2. "Application of a New Method for the Automated Calibration of Very Low Gauge and Absolute Pressures in a Commercial Calibration Laboratory"  Authors: Michael Bair, Robert Haines