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Ashcroft XLdp Ultra-Low Variable Capacitance Pressure Transducer/Transmitter

Ultra-Low Variable Capacitance Pressure Transducer/Transmitter
XLdp

The Ashcroft® XLdp is a variable capacitance sensor within a glass-clad silicon chip. The patented Si- Glas™ technology combines the inherent high sensitivity of a variable capacitance transducer with the repeatability of a micro-machined, ultra-thin silicon diaphragm.

The Ashcroft Si-Glas sensor enables precise measurement and control of very low pressure. Although the ultra-thin silicon diaphragm deflects only a micron, the sensor is 100 times more sensitive to pressure than available silicon piezoresistive pressure sensors.

The Si-Glas sensor is composed of only sputtered metals and glass molecularly bonded to silicon. There are no epoxies or other organics in the sensor to contribute to drift or mechanical degradation over time. The glass-clad silicon diaphragm withstands extreme overpressure as well as severe shock and vibration.

• Certified 0.25% and 0.5% accuracy
• 0.1˝-50˝-H2O pressure ranges
• CE approved
• High overpressure protection
• NEMA 2 stainless steel construction
• Three output signals available
• Easy installation
• On-board voltage regulation allows use of lower cost, non-precise, unregulated power supply
• 9 point NIST Traceable Calibration Certificate

Select a link under the "item" tab below to order.

Table 1Table 2Table 3Table 4Table 5Table 6Table 7
XXXXXXXXXXXXXXXX
Table 1Type Configuration
XLXLdp
Table 2Accuracy % F.S.
30.25%, ±0.015%/°F
50.50%, ±0.015%/°F
Table 3Pressure Connection
FO21/4 NPTF
MB21/4 Barbed
MB81/8 Barbed
Table 4Output Signal
151-5 Vdc
161-6 Vdc
424-20mA
Table 5Output Connection
STScrew Terminal
Table 6Pressure Range
Diff. or Gauge:
P1IW0.10˝W.C.
Diff. or Gauge:
P25IW0.25˝W.C.
Diff. or Gauge:
P5IW0.50˝W.C.
Diff. or Gauge:
P75IW0.75˝W.C.
Diff. or Gauge:
1IW1.00˝W.C.
Diff. or Gauge:
1P5IW1.50˝W.C.
Diff. or Gauge:
2IW2.00˝W.C.
Diff. or Gauge:
2P5IW2.50˝W.C.
Diff. or Gauge:
3IW3.00˝W.C.
Diff. or Gauge:
5IW5.00˝W.C.
Diff. or Gauge:
10IW10.00˝W.C.
Diff. or Gauge:
15IW15.00˝W.C.
Diff. or Gauge:
25IW25.00˝W.C.
Diff. or Gauge:
50IW50.00˝W.C.
Compound:
PO5IWL±0.05˝W.C.
Compound:
P1IWL±0.10˝W.C.
Compound:
P25IWL±0.25˝W.C.
Compound:
P5IWL±0.50˝W.C.
Compound:
1IWL±1.00˝W.C.
Compound:
2PIWL±2.00˝W.C.
Compound:
2P5IWL±2.50˝W.C.
Compound:
3IWL±3.00˝W.C.
Compound:
5IWL±5.00˝W.C.
Compound:
10IWL±10.00˝W.C.
Compound:
25IWL±25.00˝W.C.
Table 2Optional X-Variations
XCLCustom calibration
XCECE compliant 4-20mA only
XV9Calibrated vertically
XX1– Fast response time 5 msec.
XX2– Slow response time 1 sec.
PERFORMANCE SPECIFICATIONS
Stability – Max. Change (F.S./year): ±0.25 %
Custom Ranges: Special range calibrations (XCL) – consult factory
Standard Response Time: 250msec (Consult factory for damping options)
ENVIRONMENTAL SPECIFICATIONS
Temperature Limits: Storage: –40 to 180°F
Operating: –20 to 160°F (10-95% R.H. non-condensing)
Compensated Range: +35 to 135°F
Thermal Coefficients: ZERO ±0.015% F.S./°F
SPAN ±0.015% F.S./°F
Vibration Sweep: Less than 0.05% F.S. temporary effect with 5 g's 0-60 Hz
EMC: CE model compliant to EN61326: 1997
Annex A. Harmonized heavy industrial transmitter specification
FUNCTIONAL SPECIFICATIONS
Overpressure Limits: Proof: 15 psid
Burst: 25 psi
Max. static line pressure 25 psi
Mounting Position Effect: 0.5˝ W.C. and higher: ± 0.10% F.S./g
0.25˝ W.C.: ± 0.25% F.S./g
0.1˝ W.C.: ± 0.50% F.S./g
ELECTRICAL SPECIFICATIONS
Output Signal is Independent at Power Supply Changes: 12-36 Vdc range without effect on output signal
Reverse Wiring Protected Zero and Span Potentiometers: Externally accessible, non-interactive, ±10% F.S. adjustment
Supply Current: <6mA for voltage output
Warm-up Time: 5 seconds max. to meet stated specifications
PHYSICAL SPECIFICATIONS
Pressure Connections: 1/4˝ barbed stainless steel
1/8˝ barbed stainless steel (optional)
1/4 NPT female stainless steel (optional)
Electrical Connections: Terminal strip
Weight: 14 oz, NEMA 2 Case
MATERIALS: Case: 300 series stainless steel
Media: Clean, dry, non-corrosive gas (consult factory for use on other media)


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