Differential pressure transmitters

Model 574 Pressure Transmitter

Model 574 Pressure Transmitter

Viatran’s Model 574 differential pressure transmitter employs variable capacitance sensing technology for extreme reliability and high accuracy. The 574 measures pressures from 5” WC to 100 PSI with over pressure protection to 3000 PSI. The all welded 316 stainless steel construction allows the airtight and watertight 574 to be in corrosive environments, including salt air or caustic solutions.

External zero, span and calibration controls are hermetically sealed, yet are easily adjusted with Viatran’s magnetically coupled drive system. The signal conditioner in the 574 allows for 5:1 ranging of the transmitter’s
standard pressure range.


  Full Scale Pressure Ranges 0-5, 10, 20, 50, 100, 300, 750" W.C.D. 0-15, 50, 100 PSID
Nonlinearity (Best Fit Straight Line) ≤±0.15% FSO
Hysteresis ≤ ±0.1% FSO
  Repeatability ≤ ±0.1% FSO
Full Scale Output (FSO) 16 mA at 70° F (21°C)
Resolution Infinite
Long Term Stability ≤±0.1% FSO per 6 months
Zero Shift with Base Pressure ≤±2.0% FSO per 1000 PSI
Span Shift with Base Pressure ≤±1.0% FSO per 1000 PSI
Zero Shift After 3000 PSI Overload Side Angle: ≤± 0.1% FSO
Alternate Angle: ≤±0.5% FSO
Compensated Temperature Range 0°F to 170°F
Operating Temperature Range -10° F to +190° F
Storage Temperature Limits -65°F to +250°F
Temperature Effect on Zero ≤± 1.0% FSO per 100° F
Temperature Effect on Span ≤± 1.0% FSO per 100° F


Supply Voltage:
8.5 to 40 Vdc
Power Supply Regulation Effect
≤±0.02% FSO per volt over supply voltage range
Output Signal
4 to 20 mA
Load Impedance 1500 Ohms maximum at 40 Vdc
Zero Adjustment -100% FSO elevation to +50% FSO suppression of the standard range
Span Adjustment Rangeable down, 5:1 from standard range
Calibration Signal 20% of FSPR externally switched
Calibration Signal Accuracy

≤±1% of the stated value

Circuit Protection Varistor protected across the input leads for surges above 40V and currents to 250 Amps peak with a pulse width of 8 x 20 µSec.  Reverse polarity protected
Insulation Resistance >1000 MegOhms to case ground at 40 Vdc and 70° F
Response Time 10% to 90% FS Faster response available with NF option
Electrical Connection 1/2” NPT male, 3 wires, 18 AWG
Wire Codes RED + Signal / Power
BLACK - Signal / Power
GREEN Case Groun


316 Stainless Steel
Wetted Parts
316 Stainless steel and Viton O-Ring
  Weight 7 lbs.
  Identification Laser etched onto body


Pressure Connection
1/4” NPT female on 2-1/8” centers on flanges
1/2” NPT female on 2”, 2-1/8” or 2-1/4” centers with optional adapter
Proof Pressure
3000 PSID and/or 2000 PSI base pressure
Burst Pressure
4500 PSID and/or 4500 PSI base pressure
Diaphragm Displacement 0.002 cubic inches at FSPR
Fill Fluid Dow DC200 Silicone oil
Mounting May be supported by process piping or by optional mounting bracket