Murphy pressure transmitter Direct Mount Pressure Switch Model PSB PD8100 Series, PXT-K Series

The PSB switch is a direct mount switch for critical pressure points. It has one limit contact that can be used to activate an alarm, actuate indicator lights or shutdown equipment.
The construction of this instrument is the same as our time-proven Swichgage® instrument. A precision machined brass mounting plate and port captures a high quality stamped beryllium copper diaphragm. The single-pole, double-throw (SPDT) snap-switch is operated directly from the diaphragm for quick acting and positive switching. Trip point is factory preset according to your specifications.
Housing is weather sealed to prevent entry of moisture, dust, etc. A glass-filled nylon terminal block with quick screw terminal connections gives the PSB switch a real advantage in industrial engine applications. The PSB is ideal when reading is not desired, but pressure is critical to operational efficiency.
Intended for use in general purpose nonclassified areas.
• Fits all engine applications
• SPDT snap-switch
• Activates indicator lights, alarms, or shut down equipment
• Time-proven SWICHGAGE® construction
• Easy wiring terminal block
• Steel housing specially coated to resist corrosion
• Factory preset to your specifications
• Engine lubrication
• Water pumps
• Compressors
• Oil field systems
• Irrigation systems
• Construction equipment
• Light-duty mobile equipment
• Marine engines
• Generators features
• Fits all engine applications
• SPDT snap-switch
• Activates indicator lights, alarms, or shut down equipment
• Time-proven SWICHGAGE® construction
• Easy wiring terminal block
• Steel housing specially coated to resist corrosion
• Factory preset to your specifications
• Limit Switch for Critical Pressure
• Operate Alarms or Shutdown Equipment
• SPDT Snap-Acting Switch
• Fits Most Engine Applications
Housing: Plated steel.
Pressure Connection: 1/8-27 NPT, Brass.
Diaphragm: Formed beryllium copper (heat treated).
Pulsation Dampener: Brass (it is removable for cleaning)
Terminal Block: Three #4-40 screws.
Accuracy: Trip point: ±3% of full scale. Switch reset differential: ±7% of full scale.
Repeatability: ±1% of full scale.
Contact Rating: SPDT 3 A @ 30 VDC inductive.
Temperature Range:
• Ambient: -40°F (-40°C) thru 150°F (66°C).
• Process: -40°F (-40°C) thru 250°F (121°C).
Pressure Range: Specify from 0-400 psi (0- 2.76 MPa) [0- 27.58 bar].
Contact: Operates on rising or falling pressure (specify).
Shipping Weight: 8 oz. (0.25 kgs).
Shipping Dimensions: 3 x 2-3/4 x 2-3/4 in. (76 x 70 x 70 mm).
The PD8100 Series eliminates pointer flutter on pressure indicating SWICHGAGE® devices which are subject to pulsating pressure from reciprocating pumps or compressors. It also allows a close setting of high and low contact points providing for more accurate pressure indication and control of equipment.
The PD8100 Series decreases wear on geared movements and increases the life of pressure indicating instruments by eliminating excessive gage strain and unnecessary movement. A necessity which quickly pays for itself by protecting any pressure indicating and control instrument which is subject to pulsation.
Quality built with a large diameter valve stem wheel for ease of adjustment with clearly printed operating instructions. Machined from 1-3/8 in. (35 mm) hex bar stock. A two degree taper on valve and stem assure positive dampening.
Available in brass, carbon steel, 303 stainless steel or 316 stainless steel to meet pressure and environmental requirements with either 1/2 NPT or 1/4 NPT inlet connections.
• Used on Controllers, Instruments and Recorders to Dampen Pressure Pulsation
• Eliminate Gage Pointer Flutter
• Aids in Providing More Accurate Pressure Indication
• Decreases wear on a Gage’s Geared Movement
PD8183: All wetted parts are Brass.
             Rated to 3,000 psi (20.68 MPa) [206.80 bar].
PD8184: All wetted parts are Carbon steel.
             Rated to 5,000 psi (34.47 MPa) [344.70 bar].
PD8185: All wetted parts are 303 stainless steel.
             Rated to 10,000 psi (68.95 MPa) [689.50 bar].
PD8190: All wetted parts are 316 stainless steel.
             Rated to 10,000 psi (68.95 MPa) [689.50 bar].
             Meets NACE standard MR-01-75 for direct exposure to H2S.
Operating Temperature: -15 to 400°F (-26 to 204°C)
Shipping Weight (all models): 2 lbs.(0.9 kgs.)
Shipping Dimensions (all models): 4-3/4 x 4-3/4 x 3-1/4 in. (121 x 121 x 83 mm)

• 4-20 mA Output Signal
• Piezoresistive Pressure Transmitter
• Corrosion Resistant Construction
• High Stablity
The PXT-K Series pressure transmitters are state-of-the-art instruments providing 4-20 mA output. Each Piezoresistive Pressure Transmitter contains a transducer comprised of a piezoresistive silicon chip mounted on a glass-metal feedthrough header welded into a stainless steel housing and filled with silicone oil; the very thin laser-welded stainless steel isolation-diaphragm completes the front side. Media pressure is transferred from the stainless steel isolation-diaphragm, via the oil inside the cell, to the silicon measuring chip. This construction, combined with the advanced internal signal conditioning circuitry, results in a rugged instrument with extremely small temperature error and class-leading EMI/RFI resistance.
The enclosure and all wetted parts are made of 316L stainless steel to meet NACE MR01-75.
Applications: PXT-K Series Pressure Transmitters can be used in applications such as Compressors, Engines, Process Control, Liquid Level and Pumps.
• Operating Pressure Range: See the part number matrix on the reverse side.
• Operating Temperature: -40 to 180°F (-40 to 82°C).
• Compensated Temperature Range: -20 to 160°F (-29 to 71°C).
• Process Connection: 1/4 NPT female with 7/8” Hex Nut.
• Electrical Connection (PXT-K-XXX): 1/2” NPT Male Conduit connection with 60” long cable, vented
• Enclosure: NEMA 4/IP65 or better
• Body: 316L Stainless Steel. Meets NACE MR01-75.
• Wetted Parts: 316L stainless steel
• Environmental Effect (Humidity): No effect for 0-95%, Non-condensing
• Mounting: Transmitter can be installed in any axis.
• Transmitter position has negligible affect on performance as long as it is perpendicular to the flow being monitored.
• Shock Resistance: 1000g per IEC 60068-2-6 (Mechanical Shock)
• Vibration Resistance: 20G per IEC 60068-2-6 (Vibration under resonance)
• Wiring Protection: Protected against reverse polarity and short circuit, 48 VDC Maximum
• Supply Voltage: 8 - 30 VDC (Typically 24 VDC)
• Transmitter Output: 4-20mA, two wire configurations with load characteristics
• Insulation: Greater than 10MΩ @ 300 VDC
• Electromagnetic Compatibility (EMC): Standards; EN 61000-6-2:2005, EN 61000-6-3:2007, EN 61326-2-3:2006
• Voltage Surge/Spike Protection: Protection against a 600
• Volt spike per IEC 60-2
• Shipping Weight: 6.5 ounces
• Applicable Standards:
◦ NACE MR0175 Compliant with the requirements
◦ CSA (c/us): Class I / II / III, Div 1 , Groups A-F T4
◦ Class I / II / III, Div 2, Groups A-D,F,G T4
◦ IBExU 10 ATEX 1124 X
◦ II 1G Ex ia IIC T6-T4
◦ II 3G Ex nA IIC T6

PXT series (4-20ma)
PXT-K series (4-20ma)
05705320 PXT-30V30WC 05707730 PXT-K-30V30WC 05707354 PXT-30V30 05707731 PTX-K-30V30 05707355 PXT-30V100 05707732 PXT-K-30V100 05705064 PXT-15 05707733 PXT-K-15
05705065 PXT-60 05707734 PXT-K-60 05707356 PXT-100 05707735 PXT-K-100 05705066
PXT-200 05707736 PXT-K-200 05705067 PXT-300 05707737 PXT-K-300 05707357 PXT-400
05707738 PXT-K-400 05705068 PXT-600 05707739 PXT-K-600 05707358 PXT-1000 05707740 PXT-K-1000 05707359 PXT-2000 05707741 PXT-K-2000 05705069 PXT-3000 05707742 PXT-K-3000 05705070 PXT-5000 05707743 PXT-K-5000 05705071 PXT-6000 05707744 PXT-K-6000
05706114 PXT-9000 05707745 PXT-K-10000


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