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Specifically designed for severe pulp and paper applications! Generally designed for all heavy-medium pumping processes
The Ashcroft® KX transmitter combines the proven benefits of polysilicon thin film performance with the utility of a flush-mounting sensing diaphragm. Modern low-pressure chemical vapor deposition methods provide simple, stable molecular bonds between a proven metal diaphragm and a polysilicon strain gage bridge. There are no epoxies or bonding agents to contribute to signal instability or drift.
The flush sensing element is provided by an integral, silicone filled stainless steel diaphragm seal. The small sensing area and low internal volume ensure accurate measurement under severe conditions.
The polysilicon strain resistors combine very low noise levels with very high signal output. There are no semiconductor (p-n) junctions to change with temperature, time or use. The integral metal diaphragm and polysilicon bridge are virtually unaffected by shock, vibration, or mounting position.
These transmitters are offered in many standard pressure ranges with either current or voltage output signals. Transmitter performance is directly traceable to the National Institute of Standards and Technology and specifications are conservatively stated.
PERFORMANCE SPECIFICATIONS
Accuracy Class (Span): ±1.0%
Includes non-linearity, (Terminal Point Method),
hysteresis, non-repeatability, zero offset and span
setting errors
Best fit straight line (BFSL) ±0.75%
Includes non-linearity, hysteresis and nonrepeatability error
ENVIRONMENTAL SPECIFICATIONS
Temperature
Storage –65/+250°F
Operating –20/+180°F
Compensated –20/+160°F
Thermal Coefficients: (68°F ref.) % Span/°F
Standard:
ZERO ±0.04%
SPAN ±0.04%
Humidity: No performance effect at 95% relative
humidity – noncondensing
FUNCTIONAL SPECIFICATIONS
Standard Ranges (psi)
0/100 0/500 0/3000
0/150 0/750 0/5000
0/200 0/1000
0/300 0/2000
Consult factory for nonstandard ranges.
Overpressure: (F.S. psi) 0/100- 0/3000
0/2000 0/5000
Proof 200% 150%
Burst 800% 300%
Vibration Sweep: Less than ±0.1%F.S. effect for
0-400 Hz at 20 g’s in any axis
Shock: Less than ±0.1%F.S. effect for 20 g’s 20ms
shock in any axis
ELECTRICAL SPECIFICATIONS
Output Signal:
4-20mA (2 wire)
1-5 Vdc (3 wire)
1-6 Vdc (3 wire)
Power Requirements:
10-36 Vdc unregulated
Supply Current: Less than 3mA for voltage output
Output Impedance: 100 ohms
Circuit to Case Insulation Resistance:
100 M ohms @ 50 Vdc
PHYSICAL SPECIFICATIONS
Enclosure: NEMA 4X
Weight: 10 oz (approx. without cable)
MATERIALS
Case: 300 series stainless steel
Connection: 316 stainless steel
Cable: No. 24 AWG, 36˝ PVC, shielded, vented, UL approved
Diaphragm: 316Ti stainless steel
Standard Process Connections:
G-1⁄2 metric pipe thread*
O-ring seal (max. 150 psi)
1⁄2 NPT male pipe thread used in conjunction
with XWB, XWC and XWE screw-on adapters
*Mating connection available upon request
OPTIONS
• (XWB) Flush weldnut
• (XWC) Recessed weldnut
• (XWD) Weldnut plug
• (XWE) Paper mill adapter (shown in photo)
• (XWG) Halocarbon fill
Warning: Sensitive Diaphragm
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