Data Sheet
GC55 Pressure Transducer
FEATURES
Bright LED display of pressure and switch status
All SS wetted parts
Internal “push-button” configurability allows quick
user pressure range changes or relay adjustments
External “push-button” allows user to display P1, P2
or DP without opening cover
TYPICAL USES
Tank level pressure measurement
Pump controls
Compressor control
Filter monitoring
HVAC Hydronic cooling/heating systems
PERFORMANCE SPECIFICATIONS
Reference
Temperature:
Analog Output: 4-20 mA or 1-5 Vdc
Accuracy: ±0.5% of span
Response Time: 20ms
Output Resolution: ±0.2% of span
Stability: ±0.5%/year
Pressure Switch Output:
Number of Contacts:
Response Time: 20ms-2.0sec (by user)
Type: TTL/CMOS up to 40 Vdc / 200 mA
Setting Accuracy: ±1.0% of span
Hysteresis: Variable deadband (by user)
Display:
Accuracy: ±1.0% of span
Type: 3½ digits, 10mm LED
ENVIRONMENTAL SPECIFICATIONS
Temperature
Limits:
Thermal
Coefficients:
(ref. 75°F (24°C))
FUNCTIONAL SPECIFICATIONS
Static (Line) Pressure
Pressure Range:
75 to ≤300 psi
Single Side (Differential)
Pressure Range:
75 to ≤300 psi
75°F (24°C)
Includes linearity, hysteresis and repeatability
2
Storage:
Operating:
Compensated:
Zero & Span: ±0.05% of span/°C
Proof:
2 X Range (URL)
Proof:
2 X Range (URL)
−4°F to 140°F (−20°C to 60°C)
14°F to 122°F (−10°C to 50°C)
14°F to 122°F (−10°C to 50°C)
Proof:
10 X Range (URL)
Proof:
10 X Range (URL)
GC55
Pressure Transducer
KEY BENEFITS
• Robust aluminum die cast housing
• Two sensor design well suited for high DP ranges
• Min./Max. feature records, low/high pressure
events
• Two polysilicon thin film sensors to achieve wetwet, high differential pressure measurements
• Monitors/controls a wide variety of wet/dry media
Vibration: 5g’s 150Hz
Shock Effect: 10g’s 16ms
Static (Line)
Pressure Effects:
ELECTRICAL SPECIFICATIONS
Output Signal
(Current):
Output Signal
(Voltage):
Rangeablility/
Adjustment:
Switch Contacts: (2) Photo M0S relay outputs; Load 200 mA (Max.),
None
4-20 mA (3 Wire): 15-27 Vdc 80 mA
1-5 Vdc (3 wire): 11-27 Vdc 60 mA
Zero: −5% to 105% of span
Span: –5% to 105% of span
(Accuracy based upon F.S. (URL) value)
40 Vdc; Hysteresis (variable)
of 31
All speci fications are subject to change without notice.
All sales subject to standard terms and conditions.
©2019 Ashcroft Inc. GC-55_transducer_ds_RevB_Ltr_02-19
ashcroft.com
info@ashcroft.com
1.800.328.8258
Data Sheet
Pump
P2 P1
Filter Filter
P
F
GC55 Pressure Transducer
PHYSICAL SPECIFICATIONS
Weight: Approx. 1.0 lb
Environmental
Rating:
IP66
Mounting: (2) 5.2mm mounting holes
Pressure Connection:
Electrical
Connection Size:
1
/
8
NPT Female
½ NPT Female Conduit
Cable Gland (Cable diameters 0.16” to 0.63”)
WETTED MATERIAL
Diaphragm
Process Connection
Media Compatibility
Fluids and gases compatible with
17-4PH SS 304 SS
304 SS (sensor housing) and
17-4PH SS (sensor diaphragm)
NON-WETTED
Enclosure
Aluminum
OPTIONAL FEATURES
Calibration Report: 9 point NIST traceable calibration report
TWO POLYSILICON THIN FILM SENSORS
Fully welded assembly of all SS with high overpressure capability makes
the GC55 ideal for fluid pump systems in applications such as:
• Level measurement in large size and/or pressurized tanks
• Pump monitoring of building hydronic heating and cooling systems
Building
Head
P
P2 P1
LH
• Filter monitoring in water purification or hydraulic systems
P2 P1
F
Pump
P
Filter Filter
ORDERING CODE Example:
Model
GC55 - wet /wet indicating differe ntial transducer w/ switch outputs GC55
Accuracy
7 - ±0.5% of span 7
Pressure Fitting
1
F01 -
/
8
NPT Fema le F01
Output Signal
15 - 1-5 Vdc 15
42 - 4-20 mA
Electrical Connection
CG - Cable gland CG
CD - ½ NPT Female conduit
Pressure Range Differential
75# - 75 psi 75#
100# - 100 psi
150# - 150 psi
250# - 250 psi
300# - 30 0 psi
Opti on (if i ncluding an optio n(s) mu st include an “X’’)
RH - 9 pt. NIST traceab le calibration certificate
All speci fications are subject to change without notice.
All sales subject to standard terms and conditions.
©2019 Ashcroft Inc. GC-55_transducer_ds_RevB_Ltr_02-19
ashcroft.com
info@ashcroft.com
1.800.328.8258
GC55 7 F01 15 CG 75# -XRH
X__
RH
of 32
Data Sheet
MOUNTING
GC55 Pressure Transducer
DIMENSIONS in [ ] are millimeters
For reference only, consult Ashcroft for specific dimensional drawings
3.94
OUT1
OUT2
∆P
P1
P2
MPa
H(P1)
0.83
SEL
1
/
8
NPTF
Pressure inlet on
high-pressure side
2.76
Electrical Connection PG 9
threaded housing, factory installed
options include cable gland or
½ NPTF conduit connection
1.57
0.79
1
0.63
/
8
NPTF
Pressure inlet on
low-pressure side
GC55 Differential
Pressure Transducer
1.18
L(P2)
0.20
1.65
ELECTRICAL CONNECTIONS
Power supply (＋)
Power supply (−)
OUT 1 (Switch)
OUT 2 (Switch)
COM. (Switch)
Analog output
Cable Gland or ½ NPTF
Conduit Connection
MOUNTING DIMENSIONS
3.46
Ø 0.20
Mounting holes
4-20 mA out
V
A
1-5 Vdc out
(2)
Note:
(2) Mounting holes through
back of enclosure, accessible
with cover removed.
All speci fications are subject to change without notice.
All sales subject to standard terms and conditions.
©2019 Ashcroft Inc. GC-55_transducer_ds_RevB_Ltr_02-19
of 33
ashcroft.com
info@ashcroft.com
1.800.328.8258
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