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[4] 1/4 [6.35] LONG X 7/32 [5.56]
HIGH PRESSURE CONNECTION
CONDUIT CONNECTION
5 [127.00]
SERIES 647
WET/WET DIFFERENTIAL PRESSURE TRANSMITTER
±1.0% Accuracy, NEMA 4 (IP56) Enclosure, 2-Wire
CALIBRATION SERVICES AVAILABLE
PRESSURE
3-5/16
[84.15]
1-1/16 [26.97] TYP
WIDE MOUNTING HOLES
1-1/8
2-7/8
[28.58]
[73.03]
1/8 FEMALE NPT
2-15/16
[74.63]
5-9/16
[141.30]
2-1/2
[63.50]
1-17/64
[32.15]
1/8 FEMALE NPT
LOW PRESSURE
CONNECTION
Ø7/8 [22.23]
Monitor differential pressure in air/liquid ow systems, HVAC automation, pneumatic
systems and process control with the Series 647 Wet/Wet Differential Pressure
Transmitter. Units are temperature compensated and provide a 4-20 mA output
signal which can be interfaced with chart recorders, data loggers and computerized
monitoring and control systems.
BENEFITS/FEATURES
• Versatile for liquid or gas supports designs requiring more precise measurements
in support of application
• Temperature compensated improves performance of device for accurate
measurement under different operating environments
• Output signal provides capability to interface with automation systems to centralize
monitoring
APPLICATIONS
• Flow
• HVAC automation
• Process control
• Pneumatic systems
MODEL CHART
Model Range
647-0
0 to 1 in w.c.
647-1
0 to 3 in w.c.
647-2
0 to 25 in w.c.
647-3
0 to 5 in w.c.
647-4
0 to 10 in w.c.
SPECIFICATIONS
Service: Compatible gases or liquids on
both pressure and reference sides.
Wetted Materials: Brass, vinyl, glass-
lled polyester, silicon, and uorosilicone.
Accuracy: ±1.0% FS.
Stability: ±1.5% FS output/year.
Temperature Limits: 32 to 122°F (0 to
50°C).
Pressure Limits: Ranges 1 in w.c. to 5
psi: 20 psi, 15 psi range: 45 psi, 30 psi
range: 60 psi.
Thermal Effects: Zero: ±0.05% FS/°F;
Span: ±0.05% rdg/°F.
OPTIONS
Use order code: Description
NISTCAL-PT1 NIST traceable calibration certicate
USA: California Proposition 65
WARNING: This product can expose you to chemicals including Lead, which is known to the State
of California to cause cancer and birth defects or other reproductive harm. For more information go
to www.P65Warnings.ca.gov.
Power Requirements: 18-30 VDC.
Output Signal: 4-20 mA, 2-wire.
Zero and Span Adjustments:
Adjustable, ±10%.
Loop Resistance: 400Ω @ 18 VDC,
600Ω @ 24 VDC, 1000Ω @ 30 VDC.
Electrical Connection: Screw terminals,
reverse polarity protected.
Process Connections: Two 1/8˝ female
NPT.
Housing: Gasketed steel epoxy painted,
NEMA 4 (IP56).
Weight: 14 oz (397 g).
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