Model 422: Pressure Transmitter for Overhead Junction Boxes

Viatran’s Model 422 pressure transmitter is compact yet offers a high performance punch. The electronics and silicon sensor design have an integrated precision of over ±0.08%.

The Model 422 features pressure ranges of 0–3 to 5000 psi and an output of 0–5 Vdc. It has been designed specifically for overhead junction boxes.


Low-pressure applications
All stainless steel construction
High precision
Shunt calibration circuit option


The Model 422 pressure transmitter is a flexible high-performance test and control sensor that provides noise suppression, fast response time and CE compliance. Viatran feels proud in providing outstanding customer support together with a technically excellent product. Variants of this model are used across the industrial and automotive industries.


Table 1. Source: Viatran

. . .
Full Scale Pressure Range (FSPR) 0-3 thru 0-5000 PSI (0-0.2 to 0-345 bar),
0-15 PSIV (0-1.03 barV)*
Zero balance ≤±0.25% FSO  
Non-Linearity (Best Fit Straight Line) ≤±0.06% FSO standard, optional ±0.04%  
Hysteresis & Repeatability ≤±0.06% FSO standard  
Full Scale Output 5 Vdc ≤±0.25% FSO  
Long Term Stability ≤±0.3% FSO per 6 months  
Compensated Temperature* 32°F to 180°F (0°C to 82°C)  
Operating Temperature Range -40°F to 185°F (-40°C to 85°C)  
Storage Temperature -40°F to 250°F (-40°C to 121°C)  
Maximum Fluid Temperature 250°F (121°C)  
Combined Thermal Effect
(zero & span)
≤±2% FSO per 100°F typical  
* Modified specification for vacuum and compound ranges: Compensated Temperature Range 32°F to 170°F (0°C to 77°C)



Table 2. Source: Viatran

. . .
Supply Voltage 9 to 30 Vdc (12 to 30 Vdc for DM option)  
Power Supply Regulation <±0.05% FSO per Volt Output Signal  
Output Signal 0-5 Vdc  
Circuit Protection Short circuit and reverse polarity protected  
Voltage Spike Protection Withstand 1000 volt spike per EN6100-4-5  
RFI/EMI Suppression CE marked, EN 61326  
Insulation Resistance <5 nS conductance  
Response Time <1.5 millisecond  
Electrical Connections 6-pin bayonet (standard)  
Pin Outs Pin A +Power
Pin B -Power
Pin C +Signal
Pin D -Signal
Pin E AC ground (standard)
Pin F No connection
Connector Options BP Micro change (M12)
BN 4-pin bayonet
ZU Cable gland



Table 3. Source: Viatran

. .
Pressure Connection 1/8" NPT female
Proof Pressure 3x range or 1,200 PSI (whichever is less) for 0-3 thru 0-500 PSI

3x range or 9,000 PSI (whichever is less) for 0-1,000 thru 5,000 PSI
Burst Pressure 5x range or 2,400 PSI (whichever is less) for 0-3 thru 0-500 PSI

5x range or 10,000 PSI (whichever is less) for 0-1,000 thru 0-5,000 PSI
Pressure Cavity Volume 1.5 mL
Mounting May be supported by process piping


Materials of Construction

Table 4. Source: Viatran

. .
Wetted Parts 316L stainless steel
Housing 316 stainless steel
Weight 4 oz nominal
Identification Laser etched onto body



Table 5. Source: Viatran

. .
DA Isolated internal shunt calibration
(6-pin connector required)
DC Extended Compensated Temperature Range (Cold)
-40°F to 170°F (-40°C to 77°C)
DE Internal shunt calibration (6-pin connector required)
DG Improved temperature performance
DH Special range
DM Modified FSO >5 Vdc (Requires 12 to 30 Vdc Supply Voltage)
DN Improved linearity ±0.04% FSO (not available with TU option)
DQ Cleaning for oxygen service
DX Modified FSO <5 Vdc
EA Special calibration
EH Extended Compensated Temperature Range (Hot)
+70°F to 185°F (21°C to 85°C)
LV Externally powered, optically isolated shunt calibration
(6-pin connector required)
NH Customer specified marking
TU Compound special ranging
Alternate Pressure Ports  
VE 1/4 AN bulkhead mount
VF 1/4 tube Swagelok bulkhead
VG M12 x 1.5 mm female
VH M12 x 1.5 mm male
WQ G 1/4 female
YA MS33649-04
YC MS33656-04
YH 1/8" NPTM
YL 1/8" NPTF (standard)
YJ 1/4" NPTF
YK 1/4" NPTM


Model 422: Pressure Transmitter for Overhead Junction Boxes

Image Credit: Viatran

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