PHYSICAL DATA
Service: Liquid, Gas or 
Vapor.
Output: 4-20 mA DC, max. 30 mA DC (2 wire).
Power 
Supply: 10 to 30 VDC.
Loop Resistance: Vmin = 10V + (.022A x 
RL).
Zero and Span Adjust: ± 2.8% each.
Temperature 
Limits: Operating: -20°F to 180°F (-29°C to 82°C), Compensated: -20°F to 
160°F (-29°C to 71°C), Storage: -65°F to 250°F (-53.9°C to 
121°C).
Accuracy: ±0.50% F.S.
Response Time: Less than 10 
ms.
Stability: Less than 1% F.S./yr.
Hysteresis: ± 0.15% 
F.S.
Thermal Effects: Zero: 0.028% F.S./°F, Span: 0.028% 
F.S./°F
Wetted Parts: 17-4 PH stainless steel
Process 
Connection: 1/8" NPT(M)
Body: 300 Stainless 
steel.
Weight: 2 oz. (56 grams) approximate without 
cable.
Cable: 36 inches (92 cm), 24 AWG
STOCKED 
MODELS




Model Number
Operating Range, PSI 
Operating Range, Bar

638-4-FM
638-5-FM
638-6-FM
638-7-FM
638-8-FM
638-9-FM
638-10-FM
638-11-FM
638-12-FM
638-13-FM
638-14-FM 

0-100
0-150
0-200
0-300
0-500
0-750
0-1000
0-2000
0-3000
0-5000
0-7500 

0-7
0-10
0-14
0-21
0-35
0-50
0-69
0-138
0-207
0-345
0-517 
*For low-cost non-FM version omit FM in model 
number

 
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