Posted in | Sensors

Model 385—Pressure Transmitter

The Zero Cavity design of Viatran’s Model 385 Flush Tip provides an isolated sensor assembly that almost removes the installation torque effect and can endure spikes in pressure up to 20 times burst pressure and 5 times proof pressure.

The Model 385 Flush Tip has an output of 4–20 mA and enables blender pressure measurement


All stainless steel construction
Optional shunt calibration circuit



Table 1. Source: Viatran

. .
Full Scale Pressure Ranges 0-50,100, 150, 160, 200, 250, 300, 400, 500, 1,000 PSIG / PSIS
Static Error Band ≤±0.5% FSO (Includes BFSL, Hysteresis and Repeatability by RSS)
Compensated Temperature Range 70°F to 170°F (21°C to 77°C)
Operating Temperature Range -40°F to 185°F (-40°C to 85°C)
Storage Temperature Range -40°F to 250°F (-40°C to 120°C)
Long Term Stability (%FSO) ≤±0.5% FSO per 6 months
Thermal Effect on Zero ≤±2% FSO per 100°F Typical
Thermal Effect on Span ≤±2% FSO per 100°F Typical



Table 2. Source: Viatran

. . .
Output Signal 4-20 mA  
Supply Voltage 8-28 Vdc  
Power Supply Regulation <±.05% FSO per volt  
Load Impedance 926 Ohms maximum at 28 volts DC  
Circuit Protection Reverse polarity protected, CE marked  
RFI / EMI CE EMC compliant as per IEC EN 61326-1 and EN 61326-2-3 Annex BB  
Voltage Spike Protection Withstand 1000 volt spike per EN 61000-4-5  
Insulation Resistance <5 nS  
Response Time <2 mSec for 10-90% of final value  
Electrical Connection Bendix PT02E-10-6P, mates PT06E-10-6S (SR) (BH option)  
Pin Outs Pin A + Power / Signal
Pin B - Power / Signal
Pin C No connection
Pin D No connection
Pin E AC Ground
Pin F No connection
Shell Case Ground



Table 3. Source: Viatran

. .
Standard Pressure Port 1/2" NPT (M)
Zero Effect from Installation <±0.10% at 25 to 50 ft lbs
Proof Pressure 5x
Burst Pressure 20x


Materials of Construction

Table 4. Source: Viatran

. .
Wetted Materials 15-5 PH and 304L Stainless Steel (Inconel 718 optional)
Weight 8 oz. nominal



Table 5. Source: Viatran

. . .
Pressure Ranges AH: 0-50 PSI  
AM: 0-100 PSI  
AN: 0-150 PSI  
CA: 0-160 PSI  
AP: 0-200 PSI  
AQ: 0-250 PSI  
AR: 0-300 PSI  
AT: 0-400 PSI  
AU: 0-500 PSI  
AY: 0-1,000 PSI  
Alternate Electrical Connections BH Welded - 6 Pin bayonet shell size 10
ZE Welded - 4 Pin Hermetic,shell size 14S, (MIL-DTL-5015H)
ZU Welded- Direct Coupled Cable
Pressure Connection VQ 3/4"-16 UNF (M) (Includes Std Nitrile / NBR "O" ring)
VR G 1/2" (M) (Includes Std Nitrile / NBR ED Seal according to DIN 3869)
Performance Options DA Isolated Internal Shunt Cal at 80% Full Scale
DC Extended Compensated Temperature Range (Cold) -40°F to 170°F (-40°C to 77°C)
EA Special Calibration Run
EH Extended Compensated Temperature Range (Hot) +70°F to 185°F (21°C to 85°C)
GA "O" Ring or ED Seal- VITON® / FKM material
GD "O" Ring - EPDM material (not available with "VR" option)
NH Customer Specified Identification
PW 1/8 DIN Digital Indicator
QK Inconel 718 - for all wetted parts (minimum range is 0-150 PSI)


Model 385—Pressure Transmitter

Image Credit: Viatran


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