Model 28H Barometric Pressure Transmitter

0-5 VDC, High Accuracy, 25″ thru 32″ HgA


 High Accuracy
 Many Options available
 All Stainless Steel construction
 Low Pressure Applications


Viatran’s Model 28H pressure sensor is among our most accurate pressure transmitters for industrial test and research applications. The 28H measures barometric pressure from 25″ to 32″ HgA with Improved Accuracy of ≤±0.06% FSO available.


Data sheet   28H Barometric

Full Scale Pressure Ranges (FSPR)
25″ to 32″ HgA
(Optional ranges can be factory set from 0” to 32” HgA with a minimum 7” HgA span)
Accuracy (RSS*)
≤±0.21% FSO**
Nonlinearity (Best Fit Straight Line)
≤±0.1% FSO (≤±0.06% FSO with DN option)
Hysteresis & Repeatability
≤±0.13% FSO each
Full Scale Output (FSO)
5 Vdc ≤±0.5% FSO at 70°F (21°C) Standard
10 Vdc ≤±0.5% FSO at 70°F (21°C) Optional
Long Term Stability
≤±0.5% FSO per 6 months (typical)
Compensated Temperature Range
32°F to 170°F (0° to 77° C)
Process Media Temperature Range
-40°F to 250°F (-40°C to 121°C)
Ambient Operating Temperature Range
-40°F to 185°F (-40°C to 85°C)
Storage Temperature Limits
-40°F to 185°F (-40°C to 85°C)
Temperature Effect on Zero
≤±0.01% FSO per 1°F (.556°C)
Temperature Effect on Span
≤±0.01% FSO per 1°F (.556°C)
Supply Voltage
8 to 30 Vdc at 3.5 mA nominal, 5 mA max
12 to 30 Vdc (10 Vdc Output Option)
Power Supply Regulation
≤±0.01% FSO per volt change over the supply voltage range
Output Signal
0 – 5 Vdc (Standard)
0 – 10 Vdc (Optional)
Load Resistance
100K Ohms minimum
Circuit Protection
Input polarity may be reversed. Output may be short-circuited indefinitelyOver voltage protection to 1000 volts according to EN61000-4-5
Insulation Resistance
<5 nS to case ground
Response Time
<2 mSec to reach 90% of full scale
RFI / EMI Suppression
CE EMC compliant per IEC EN 61326-1 & 61326-2-3 Annex BB, CE marked
Electrical Connection
Bendix / Amphenol PT02E-10-6P, mates PT06E-10-6S (SR)
Pin Outs
Pin A               + Power
Pin B                – Power
Pin C               + Signal
Pin D               – Signal
Pin E               No connection
Pin F               No connection
Shell               Ground