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Ashcroft   Type XLdp Ultra-Low
Differential Pressure
Transducer / Transmitter
  • Certified 0.25 and 0.5% accuracy
  • High overpressure protection
  • Flame proof NEMA 2 stainless steel construction
  • Three output signals
  • Easy installation

 

   The Ashcroft® XLdp is a variable capacitance sensor within a glassclad 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 now 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.		 XLdp Transducer

PERFORMANCE CHARACTERISTICS
Standard Ranges (Inches W.C.)
Unidirectional Ranges:
Differential or Gage
0/0.1 0/1.0 0/3.0 0/25.0
0/0.25 0/1.5 0/5.0 0/50.0
0/0.5 0/2.0 0/10.0  
0/0.75 0/2.5 0/15.0  
Bidirectional Ranges:
Compound
0/0.5 0/1.0 0/5.0  
0/0.1 0/2.0 0/10.0  
0/0.25 0/2.5 0/25.0  
0/0.5 0/3.0    
Consult factory for nonstandard ranges.
Accuracy Class (F.S.):    0.25% 0.5%
Nonlinearity    
  Terminal Point* ±0.2 ±0.4
  Best fit straight line(BFSL) ±0.15 ±0.3
Hysteresis ±0.02 ±0.02
Nonrepeatability ±0.03 ±0.05
Interchangability ±0.25% ±0.50%
* Including hysteresis
Stability: ±0.5%F.S./yr
ENVIRONMENTAL CHARACTERISTICS
Temperature Limits:
Storage: -40 to +180°F
Operating: -20 to +160°F
(10-95% R.H. noncondensing)
Compensated Range: -20 to +160°F
Thermal Coefficients:
ZERO ±0.015%F.S./°F
SPAN ±0.015%F.S./°F
 
FUNCTIONAL CHARACTERISTICS
Overpressure Limits (F.S.):
Proof 15 psig
Burst 50 psig
Vibration Sweep:
Less than ±0.1% F.S. temporarily effect with 5g's 0-60Hz
Mounting Position Error:
0.5"W.C. and higher =<0.10F.S./g
0.25"W.C. =<0.25F.S./g
0.1"W.C. =<0.50F.S./g
ELECTRICAL SPECIFICATIONS
Output Signal: Power:
4-20mA (2-wire) 12-36 Vdc
1-5 Vdc (3-wire) 12-36 Vdc
1-6 Vdc (3-wire) 12-36 Vdc
Response Time:
250msec
(Consult factory for response time options)
Resolution:
Infinite
Reverse Wiring Protected
Warm-up time:
less than one second
Zero and Span Potentiometers:
Externally accessible, noninteractive, ±10% F.S. adjustment
Power Supply:
Variations will not affect output signal
Supply Current:
<6mA vor voltage output
 
PHYSICAL CHARACTERISTICS
Weight:
14 oz. NEMA 2 Case
MATERIALS:
Case:
300 Series stainless steel
Pressure Connection Options:
1/4 barbed stainless steel
two 1/4 NPTF stainless steel
Notes:
  • Consult Factory for use with media other than air or nonconducting gases
  • OEM circuit board available (MB1)
  • Calibration curve (0.25%) or data (0.50%) supplied with each transmitter
  • Consult factory on other pressure range, temperature compensation or packaging variations

PART NUMBER FOR A TRANSDUCER/TRANSMITTER:
Select: XL 3 F02 42 ST P1IW
  Type
(XLdp)		 Accuracy
(3) 0.25%, ±0.015%/°F
(5) 0.50%, ±0.015%/°F		 Pressure Connection
(F02) ¼ NPT-F
(MB2) ¼ Barbed
(MB1) No Case		 Output Signal
(15) 1/5Vdc
(16) 1/6Vdc
(42) 4-20mA		 Terminal Connection
(ST) Screw Termination		 Pressure Range
Diff. or Gauge:
(P1IW) 0.10"WC
(P25IW) 0.25"WC
(P5IW) 0.50"WC
(P75IW) 0.75"WC
(1IW) 1.00"WC
(1P5IW) 1.50"WC
(2IW) 2.00"WC
(2P5IW) 2.50"WC
(3IW) 3.00"WC
(5IW) 5.00"WC
(10IW)10.00"WC
(25IW) 25.00"WC
(50IW) 50.00"WC


Compound:
(P05IWL) ±0.05"WC
(P1IWL) ±0.10"WC
(P25IWL) ±0.25"WC
(P5IWL) ±0.50"WC
(1IWL) ±1.00"WC
(2PIWL) ±2.00"WC
(2P5IWL) ±2.50"
(3IWL) ±3.00"WC
(5IWL) ±5.00"WC
(10IWL) ±10.00"WC
(25IWL) ±25.00"WC
(50IWL) ±50.00"WC

UNIT CONVERSION

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