PHYSICAL DATA
Service: Clean, dry air and compatible, 
non-corrosive gases
Accuracy: ±1.0% FS (includes linearity, 
hysteresis, and repeatability)
Output: 4 to 20 mA, 2 wire
Supply 
Voltage: 12 to 36 VDC
Loop Resistance: 600Ω @ 24VDC
Zero and 
Span: Zero adjustable: ±5%. Span adjustable: ±3%
Response Time: 
250 ms
Maximum Pressure: 10 psig (0.7 kg/cm²)
Compensated 
Temperature Range: 40 to 125°F (4 to 52°C)
Storage Temperature: 
-40 to 180°F -(-40 to 82°C)
Thermal Effects: Zero: ±0.025% FS/°F, 
Span: ±0.025% rdg/°F
Stability: ±1.0% FS output per year
Wetted 
Parts: Stainless steel
Housing: Stainless steel, NEMA 1 
case
Process Connections: Barbed for 1/8" or ¼" I.D. 
tubing
Electrical Connection: Screw terminals
Weight: 4.5 
oz. (128 g) 
STOCKED MODELS




Model Number
Range
Model Number
Range

648-0
648-1
648-2
648-4 
0 to 0.1" w.c.
0 to 0.25" w.c.
0 to 0.5" w.c.
0 to 1 w.c. 

648-6
648-9
648-10 
0 to 2" w.c.
0 to 5" w.c.
0 to 10" w.c.