Gefran M6 SERIES Data Sheet
DIGITAL MELT PRESSURE GAUGE
M6 SERIES 4–20 mA Retransmission
The M6 Series has an improved digital readout utilizing
an extra-large five-digit display.
The M6 Series melt pressure gauge provides reliable,
maintenance-free, localized pressure indication.
The small capillary tube filled with a special medium isolates the gauge housing from potential thermal damage.
MAIN FEATURES
• Better than ±0.50% accuracy
• Economically priced
• 2 times overload capacity
• 1/2-20 UNF thread standard, M18x1.5 also available
• One alarm standard
• 4-20 mA retransmission standard
• 15-5 stainless steel diaphragm with GTP+ coating standard (others available upon request)
• 17-7 PH corrugated diaphragm with
TiN (Titanium Nitride) coating for ranges below 100 bar
(1500 psi)
M60 The rigid stem configuration makes installation fast
and easy.
M61 The flexible configuration is designed for applica tions requiring further thermal isolation or where
installation would be otherwise difficult or
impractical.
M62 The pressure/temperature configuration requires
only one mounting hole for the measurement of both
process values.
TECHNICAL SPECIFICATIONS
Nominal accuracy including M < ±0.50% FSO
Linearity, Repeatability, Hysteresis
Measurement Range 0–35 to 0–1000 bar
0–500 to 0–15000 psi
Maximum Overpressure 2 x FSO
Measurement Principle Strain gage Wheatstone bridge
Supply Voltage 115 VAC or 230 VAC (factory set)
Retransmission of Pressure Value 4–20 mA (650Ω max. load)
Maximum Housing Temperature 55°C (130°F)
Thermal Drift in Zero Shift 4.0%/100°C (2.0%/100°F)
Compensated Range Sensitivity Shift 2.0%/100°C (1.0%/100°F)
Maximum Diaphragm Temperature 400°C (750°F)
Zero Drift due to 0.02 bar/°C
Change in Process Temperature (15 psi/100°F)
Material In Contact Standard 15-5 PH SS (GTP+ coated)
with Process Medium 70 bar (1000 Corrugated 17-7PH SS
psi) and below (Titanium Nitride coated)
Thermocouple (model M62) Type “J” (isolated junction)
Alarm High Only
For C Relay 5A @ 115-230 VDC
FSO = Full Scale Output (output signal at nominal pressure)
ACCESSORIES
Accessories
Mounting bracket .................................................................................................................................. SF18-659
Dummy plug for 1/2-20UNF ................................................................................................................. SC12
Dummy plug for M18x1.5 ..................................................................................................................... SC18
Drill kit for 1/2-20UNF ........................................................................................................................... KF12
Drill kit for M18x1.5 .............................................................................................................................. KF18
Cleaning kit for 1/2-20UNF ................................................................................................................... CT12
Cleaning kit for M18x1.5 ...................................................................................................................... CT18
Thermocouple for M62 model
Type “J” (153 mm [6”] stem) ................................................................................................................ TTER718
MECHANICAL DIMENSIONS
M60
Alarm Reset Button
ø138.4 [ø5.45”]
28.7 [1.13”]
12.7 [0.50”]
ø152.4 [ø6.00”]
ø4.7 [ø0.18”]
Panel mounting
ø39.4 [ø1.55”]
D5
D4
D1
D3
D2
12.7 [0.50”]
12.7 [0.50”]
ø152.4 [ø6.00”]
Alarm Reset Button
ø138.4 [ø5.45”]
58.7 [2.31”]
D5
D4
D1
D3
D2
M61
ø4.7 [ø0.18”]
Panel mounting
ø39.4 [ø1.55”]
ø17.5 [ø0.69”]
30.0 [1.18”]
ø7.5 [ø0.30”] 475 [18”]
Flexible armor
D1
D2
D3
D4
D5
A
B
C
Ch
[Hex]
1/2-20 UNF
ø7.8 -0.05
[ø0.307” -0.002]
ø10.49 ±0.025
[ø0.413” ±0.001]
ø10.67
[ø0.42”]
ø12.7
[ø0.5”]
5.56 -0.26
[0.219” -0.01]
11.4
[0.45”]
15.75
[0.62”]
16
[5/8”]
D1
D2
D3
D4
D5
A
B
C
Ch
[Hex]
M18x1.5
ø10 -0.05
[ø0.394” -0.002]
ø16 -0.08
[ø0.630” -0.015]
ø16 -0.4
[ø0.630” -0.015]
ø18
[ø0.71”]
6 -0.26
[0.236” -0.010]
14.8 -0.4
[0.580” -0.016]
19
[0.75”]
19
[3/4”]
Type J Thermocouple
with connector
ø7.5 [ø0.30”] 108 [4.5”]
Flexible armor
ø31.8 [ø1.25”]
38.1 [1.50”]
ø152.4 [ø6.00”]
Alarm Reset Button
ø138.4 [ø5.45”]
58.7 [2.31”]
D5
D4
D1
D3
D2
M62
ø4.7 [ø0.18”]
Panel mounting
ø39.4 [ø1.55”]
ø17.5 [ø0.69”]
30.0 [1.18”]
ø7.5 [ø0.30”] 475 [18”]
Flexible armor
NOTE : dimensions refer to rigid stem length option “4” (153 mm – 6”) and flex length option “D” (457mm – 18”)
WARNING : For installation use a maximum tightening torque of 56 Nm(500 in-lb)
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