51B Baratron® Single-end, Absolute Pressure/Vacuum Switch
(10-26,000 Torr)

photo - 51A Baratron Single-end, Absolute Pressure/Vacuum Switch (10-26,000 Torr)

The MKS Instruments 51B Single-end Pressure Switch offers accurate and reliable protection for vacuum vacuum/pressure processes. Designed for applications where a DC signal output is not required, these switches provide relay outputs that are readily interfaced with alarms, valve actuators, computers, process controllers, load locks and other protection devices. The 51B is referenced to vacuum.

Features & Benefits:

  • High reliability reduces downtime
  • Superb set point accuracy and repeatability
  • All-metal, all-welded construction exposes only stainless steel and Inconel® for corrosion resistance
  • Switch relay can be set to energize above or below set point for fail-safe operation
  • Low hysteresis improves set point accuracy

Applications:

The 51B Baratron® Absolute Pressure Switch provides precise control for a wide variety of production applications including semiconductor processing tools, high vacuum pumps, compressors, blowers, medical equipment and machine tools. The 51B is often used in conjuncton with soft pumping, gas box switching, and safety interlocks.

Incoloy® and Iconel® are registered trademarks of Inco Alloys International.
VCR® is a registered trademark of Swagelok® Company.

Indicate desired trip point as a three-digit value in the comments section of the order form.

List pricing is available for registered users from the USA under "Configurations" (below). Register/log in here.

Configurations:

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Part NumberPressure Range full scaleFittingInput VoltageRelay ModeConnectorPriceQTY
51B11TCA1AAXXX10 mmHg (Torr)Swagelok® 4 VCR® fixed male10-20 VDCEnergizes with pressure above the set point9-pin Type "D" maleQuote Only
51B11TCA1AFXXX10 mmHg (Torr)Swagelok® 4 VCR® fixed male10-20 VDCEnergizes with pressure above the set pointflying leads - 2 ft shielded cableQuote Only
51B11TCA1BAXXX10 mmHg (Torr)Swagelok® 4 VCR® fixed male10-20 VDCEnergizes with pressure below the set point9-pin Type "D" maleQuote Only
51B11TCA1BFXXX10 mmHg (Torr)Swagelok® 4 VCR® fixed male10-20 VDCEnergizes with pressure below the set pointflying leads - 2 ft shielded cableQuote Only
51B11TCA2AAXXX10 mmHg (Torr)Swagelok® 4 VCR® fixed male20-30 VDCEnergizes with pressure above the set point9-pin Type "D" maleQuote Only
51B11TCA2AFXXX10 mmHg (Torr)Swagelok® 4 VCR® fixed male20-30 VDCEnergizes with pressure above the set pointflying leads - 2 ft shielded cableQuote Only
51B11TCA2BAXXX10 mmHg (Torr)Swagelok® 4 VCR® fixed male20-30 VDCEnergizes with pressure below the set point9-pin Type "D" maleQuote Only
51B11TCA2BFXXX10 mmHg (Torr)Swagelok® 4 VCR® fixed male20-30 VDCEnergizes with pressure below the set pointflying leads - 2 ft shielded cableQuote Only
51B12TCA1AAXXX100 mmHg (Torr)Swagelok® 4 VCR® fixed male10-20 VDCEnergizes with pressure above the set point9-pin Type "D" maleQuote Only
51B12TCA1AFXXX100 mmHg (Torr)Swagelok® 4 VCR® fixed male10-20 VDCEnergizes with pressure above the set pointflying leads - 2 ft shielded cableQuote Only
51B12TCA1BAXXX100 mmHg (Torr)Swagelok® 4 VCR® fixed male10-20 VDCEnergizes with pressure below the set point9-pin Type "D" maleQuote Only
51B12TCA1BFXXX100 mmHg (Torr)Swagelok® 4 VCR® fixed male10-20 VDCEnergizes with pressure below the set pointflying leads - 2 ft shielded cableQuote Only
51B12TCA2AAXXX100 mmHg (Torr)Swagelok® 4 VCR® fixed male20-30 VDCEnergizes with pressure above the set point9-pin Type "D" maleQuote Only
51B12TCA2AFXXX100 mmHg (Torr)Swagelok® 4 VCR® fixed male20-30 VDCEnergizes with pressure above the set pointflying leads - 2 ft shielded cableQuote Only
51B12TCA2BAXXX100 mmHg (Torr)Swagelok® 4 VCR® fixed male20-30 VDCEnergizes with pressure below the set point9-pin Type "D" maleQuote Only
51B12TCA2BFXXX100 mmHg (Torr)Swagelok® 4 VCR® fixed male20-30 VDCEnergizes with pressure below the set pointflying leads - 2 ft shielded cableQuote Only
51B13TCA1AAXXX1,000 mmHg (Torr)Swagelok® 4 VCR® fixed male10-20 VDCEnergizes with pressure above the set point9-pin Type "D" maleQuote Only
51B13TCA1AFXXX1,000 mmHg (Torr)Swagelok® 4 VCR® fixed male10-20 VDCEnergizes with pressure above the set pointflying leads - 2 ft shielded cableQuote Only
51B13TCA1BAXXX1,000 mmHg (Torr)Swagelok® 4 VCR® fixed male10-20 VDCEnergizes with pressure below the set point9-pin Type "D" maleQuote Only
51B13TCA1BFXXX1,000 mmHg (Torr)Swagelok® 4 VCR® fixed male10-20 VDCEnergizes with pressure below the set pointflying leads - 2 ft shielded cableQuote Only
51B13TCA2AAXXX1,000 mmHg (Torr)Swagelok® 4 VCR® fixed male20-30 VDCEnergizes with pressure above the set point9-pin Type "D" maleQuote Only
51B13TCA2AFXXX1,000 mmHg (Torr)Swagelok® 4 VCR® fixed male20-30 VDCEnergizes with pressure above the set pointflying leads - 2 ft shielded cableQuote Only
51B13TCA2BAXXX1,000 mmHg (Torr)Swagelok® 4 VCR® fixed male20-30 VDCEnergizes with pressure below the set point9-pin Type "D" maleQuote Only
51B13TCA2BFXXX1,000 mmHg (Torr)Swagelok® 4 VCR® fixed male20-30 VDCEnergizes with pressure below the set pointflying leads - 2 ft shielded cableQuote Only
51B12PFE1AAXXX100 psia1/8 NPT male10-20 VDCEnergizes with pressure above the set point9-pin Type "D" maleQuote Only
51B12PFE1AFXXX100 psia1/8 NPT male10-20 VDCEnergizes with pressure above the set pointflying leads - 2 ft shielded cableQuote Only
51B12PFE1BAXXX100 psia1/8 NPT male10-20 VDCEnergizes with pressure below the set point9-pin Type "D" maleQuote Only
51B12PFE1BFXXX100 psia1/8 NPT male10-20 VDCEnergizes with pressure below the set pointflying leads - 2 ft shielded cableQuote Only
51B12PFE2AAXXX100 psia1/8 NPT male20-30 VDCEnergizes with pressure above the set point9-pin Type "D" maleQuote Only
51B12PFE2AFXXX100 psia1/8 NPT male20-30 VDCEnergizes with pressure above the set pointflying leads - 2 ft shielded cableQuote Only
51B12PFE2BAXXX100 psia1/8 NPT male20-30 VDCEnergizes with pressure below the set point9-pin Type "D" maleQuote Only
51B12PFE2BFXXX100 psia1/8 NPT male20-30 VDCEnergizes with pressure below the set pointflying leads - 2 ft shielded cableQuote Only
51B12PFB1AAXXX100 psia1/4 NPT male10-20 VDCEnergizes with pressure above the set point9-pin Type "D" maleQuote Only
51B12PFB1AFXXX100 psia1/4 NPT male10-20 VDCEnergizes with pressure above the set pointflying leads - 2 ft shielded cableQuote Only
51B12PFB1BAXXX100 psia1/4 NPT male10-20 VDCEnergizes with pressure below the set point9-pin Type "D" maleQuote Only
51B12PFB1BFXXX100 psia1/4 NPT male10-20 VDCEnergizes with pressure below the set pointflying leads - 2 ft shielded cableQuote Only
51B12PFB2AAXXX100 psia1/4 NPT male20-30 VDCEnergizes with pressure above the set point9-pin Type "D" maleQuote Only
51B12PFB2AFXXX100 psia1/4 NPT male20-30 VDCEnergizes with pressure above the set pointflying leads - 2 ft shielded cableQuote Only
51B12PFB2BAXXX100 psia1/4 NPT male20-30 VDCEnergizes with pressure below the set point9-pin Type "D" maleQuote Only
51B12PFB2BFXXX100 psia1/4 NPT male20-30 VDCEnergizes with pressure below the set pointflying leads - 2 ft shielded cableQuote Only
51B52PFE1AAXXX500 psia1/8 NPT male10-20 VDCEnergizes with pressure above the set point9-pin Type "D" maleQuote Only
51B52PFE1AFXXX500 psia1/8 NPT male10-20 VDCEnergizes with pressure above the set pointflying leads - 2 ft shielded cableQuote Only
51B52PFE1BAXXX500 psia1/8 NPT male10-20 VDCEnergizes with pressure below the set point9-pin Type "D" maleQuote Only
51B52PFE1BFXXX500 psia1/8 NPT male10-20 VDCEnergizes with pressure below the set pointflying leads - 2 ft shielded cableQuote Only
51B52PFE2AAXXX500 psia1/8 NPT male20-30 VDCEnergizes with pressure above the set point9-pin Type "D" maleQuote Only
51B52PFE2AFXXX500 psia1/8 NPT male20-30 VDCEnergizes with pressure above the set pointflying leads - 2 ft shielded cableQuote Only
51B52PFE2BAXXX500 psia1/8 NPT male20-30 VDCEnergizes with pressure below the set point9-pin Type "D" maleQuote Only
51B52PFE2BFXXX500 psia1/8 NPT male20-30 VDCEnergizes with pressure below the set pointflying leads - 2 ft shielded cableQuote Only
51B52PFB1AAXXX500 psia1/4 NPT male10-20 VDCEnergizes with pressure above the set point9-pin Type "D" maleQuote Only
51B52PFB1AFXXX500 psia1/4 NPT male10-20 VDCEnergizes with pressure above the set pointflying leads - 2 ft shielded cableQuote Only
51B52PFB1BAXXX500 psia1/4 NPT male10-20 VDCEnergizes with pressure below the set point9-pin Type "D" maleQuote Only
51B52PFB1BFXXX500 psia1/4 NPT male10-20 VDCEnergizes with pressure below the set pointflying leads - 2 ft shielded cableQuote Only
51B52PFB2AAXXX500 psia1/4 NPT male20-30 VDCEnergizes with pressure above the set point9-pin Type "D" maleQuote Only
51B52PFB2AFXXX500 psia1/4 NPT male20-30 VDCEnergizes with pressure above the set pointflying leads - 2 ft shielded cableQuote Only
51B52PFB2BAXXX500 psia1/4 NPT male20-30 VDCEnergizes with pressure below the set point9-pin Type "D" maleQuote Only
51B52PFB2BFXXX500 psia1/4 NPT male20-30 VDCEnergizes with pressure below the set pointflying leads - 2 ft shielded cableQuote Only

Need help?

Contact an Applications Specialist by sending an email to MKS Instruments, or call 978-645-5500.