Specifications
51B Baratron®
Single-end, Absolute Pressure/Vacuum Switch
More about the 51B Baratron® Single-end, Absolute Pressure/Vacuum Switch
here
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51B Baratron®
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Full Scale Ranges
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10 Torr through 500 psi (Consult Applications Engineering on Full Scale ranges in other engineering units. Selection of trip point and Full Scale range should be as close as possible as trip point accuracy is affected by the Full Scale range)
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Trip Point Range
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5% to 100% of Full Scale
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Accuracy
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±0.5% of Full Scale (± temperature coefficient)
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Temperature Coefficient
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±0.07% of Full Scale/°C
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Ambient Operating Temperature
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0° to 50°C
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Trip Point Dead Band
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±3% of Full Scale (nominal)
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Response Time
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<20 msec
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Materials Exposed to Process Gases
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Inconel and 316L stainless steel
10 µRa max. on switches with Swagelok® VCR® fittings (5 µRa max. optional)
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Internal Volume
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3.3 cc
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Overpressure
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2 x Full Scale or 45 psia, whichever is greater
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Outputs
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Electromechanical relay - SPDT (isolated) contacts rated up to 1 Amp @ 30 VDC resistive.
Relay is energized either with increasing pressure or decreasing pressure.
Input Power Required 10 to 20 VDC @ 35 mA max. or 20 to 30 VDC @ 30 mA max.
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Fittings
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4 VCR® male, NW 16 KF, 1/8 NPT, 1/4 NPT
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Compliance
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CE Compliant to EMC Directive 2004/108/EC
(when used with an overall metal braided shielded cable, properly grounded at both ends; flying leads are already shielded but must be properly grounded at user's end to comply)
Fully compliant to RoHS Directive 2002-95-EC
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Note:
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Atmospheric switches provide a means by which the trip set point is referenced to current atmospheric conditions. "Reverse
Calibration" allows the trip point to be set at or below the current atmospheric pressure. When ordering, a value of 000 in the last three
digits of the model code would equate to atmospheric pressure. A value of 002 would equate to 2 Torr or 2 PSIG below atmospheric
pressure, depending on the use of the "D" or "C" ordering code for Full Scale range.
This method provides an excellent mechanism to achieve switching at current atmospheric conditions, regardless of the location of the
installed base or present weather conditions.
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Specifications are subject to change without notice.
VCR® is a registered trademark of Swagelok® Company.
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