Pressure and
Differential Pressure
Transducer
Construction
The GEMÜ 3120 pressure and differential pressure transducer has an all
plastic housing and is suitable for relative pressure / differential pressure
measurements from 0-1 bar to 0-10 bar. The pick-up is temperature
compensated and is available in various designs. The process connection
is configured as standard with male threads to DIN 3852 or DIN 16288.
The electrical connection is via a plug complying with DIN EN 175301-803
Form A. The transducer is calibrated at the factory and provides industrial
standard measuring signals.
Features
• The pressure transducer converts the physical variable pressure
proportionally into an electrical signal.
• The differential pressure transducer measures the physical variable
pressure at 2 measuring points and converts the differential into an
electrical signal. Plus and minus differentials are evaluated.
• GEMÜ 3120 is available as a 2 wire transducer (4-20 mA) and as a
pressure measurement device with either current (0/4-20 mA) or relay
output (adjustable MIN and MAX switch points).
Advantages
All plastic design
Ceramic sensor with PTFE foil
Linear output signal
Simple mounting
Fast response time
Optional mounting position
Minimum temperature influence
Transducer dimensions code 600 [mm]
Connection standard code 9A
SW
19
27
H1
72
67
□50
H
63
H
88
92
H1
G
G 1/4
G 1/2
39
•
•
•
•
•
•
•
G
SW
3120
Technical data
Input parameters
Measuring span
Auxiliary power
0-10 bar (see order key)
Overload limit
see table 1 (page 3)
Materials
Materials of medium wetted parts
Connecting element
PVDF
Sensor
- Stainl. steel (code A0)
Stainl. steel 1.4401/1.4301
- PTFE (code A3)
PTFE foil 0.5 mm on
ceramic sensor
SealFPM
3120
2V
Ambient temperature
-10° C ... +50° C
Medium temperature
-10° C ... +60° C
2 wire transducer:
Storage temperature
-20° C ... +60° C
Directives:
EMC directive
89/336/EEC
Low voltage directive
73/23/EEC
Protection class
IP 65
Materials of parts in contact with the ambience
Connecting element
PVDF
HousingPP
Housing cover of measurement device PSU
Mechanical data
Pressure connection
Connecting element
Torque
Electrical connection
Mounting position
Weight
2 wire transducer
Measurement device
Differential pressure
measurement device
G1/4A to DIN 16288
G1/2A to DIN 16288
G1/4A to DIN 3852
G1/2A to DIN 3852
G3/4A to DIN 3852
max. 20 Nm
Plug according to DIN EN
175301-803 Form A
optional
appr. 170 g
appr. 300 g
appr. 500 g
≤ 20 ms
Temperature [°C]
PVDF
Maximum ripple
24V DC (+10%, -15%) / 50mA
Ambient conditions
2 wire transducer
Output span
4-20 mA
Load impedance
see characteristic
Measurement device with current output
Output span
0/4-20 mA
Load impedance
≤ 750 Ω
Voltage output
0-10 V upon request
Measurement device with relay output
Switching output
125 V AC / 0.6 A
110 V DC / 0.6 A
30 V DC / 2.0 A
Switch points
Min relay adjustable from 0-100%
Max relay adjustable from 0-100%
Hysteresis ±1% of measuring span
Optical display
Type
LC display 3 1/2 digit
Units
bar, psi
Functions (selection by switch)
Display of measured value
Switch point MIN relay
Switch point MAX relay
Accuracy
±0.5% of measuring span
±1 digit
Temperature coefficient of zero output
typ 0.2%/10K of measuring span
Temperature coefficient of output span
typ 0.2%/10K of measuring span
Overload influence
≤ 0.1% of measuring span
Characteristic deviation at limiting value adjustment
- Sensor material (code A0)
(incl. repeatability)
±0.5% of measuring span
Hysteresis
±0.1% of measuring span
- Sensor material (code A3) ± 1% of measuring span
(incl. hysteresis and repeatability)
Warming up time
5 min
Material
15-35V DC
Measurement device
Output parameters
Response time
2 wire transducer
Code 20
Pressure / temperature correlation for PN 10
-20
-10
±0
5
-
10,0
10,0
10,0
10
20
25
30
40
50
60
70
80
10,0
10,0
10,0
9,0
8,0
7,1
6,3
-
-
permissible operating pressure [bar]
2
Technical data
Measure
range
Stainless steel (code A0)
Overload
min.
Overload
max.
Bursting
pressure
PTFE (code A3)
Max. medium
temperature
Overload
min.
[bar]
[°C]
rel.*
abs.
rel.*/abs. rel.*/abs.
rel.*
abs.
0 - 1,0
- 0,6
n.v.
4,0
7
60
0 - 1,6
- 0,6
n.v.
6,4
12
60
0 - 2,5
- 0,6
n.v.
10,0
16
60
- 0,7
n.v.
0 - 4,0
- 0,6
n.v.
16,0
16
60
- 0,7
n.v.
0 - 6,0
- 0,6
n.v.
16,0
25
60
- 0,7
n.v.
0 - 10,0
- 0,6
n.v.
16,0
25
25
- 0,7
n.v.
* the differential pressure measurement device operates with relative pressure sensors
n.v. = not available, can be used up to 10mbar/abs
[bar]
Load impedance
2 wire transducer
Overload
max.
[bar]
rel.*/abs.
12
12
16
16
Bursting
pressure
Max. medium
temperature
[°C]
rel.*/abs.
16
16
25
25
60
60
60
25
Connection diagram
Measurement device with relay output
Supply voltage [VDC]
30
Supply voltage
1= GND
25
2= 24 V DC
20
Display changeover
(in housing)
23
4
1 = Actual value
2 = MIN value
3 = MAX value
35
1
Sensor
material
Table 1: Measuring ranges / Sensor material
1
3
2
2
1
15
0
1000
500
Load impedance [Ohm]
Signal output
1= MIN
MIN-Relais
MIN relay
3= MAX
MAX relay
MAX-Relais
2= Uv
Connection diagram
2 wire transmitter
1
Connection diagram
Measurement device with current output
Supply voltage
2
1= GND
2= 24 V DC
24 V
1
3
2
2
1
Signal output
1= GND
2= 0/4 - 20 mA
3
3120
Order data
Connection size
Differential pressure measurement device
1/4“ (differential pressure)
1/2“ (differential pressure)
Relative pressure measurement device
1/4“ (relative pressure)
1/2“ (relative pressure)
3/4“ (relative pressure)
Absolute pressure measurement device
1/4“ (absolute pressure)
1/2“ (absolute pressure)
3/4“ (absolute pressure)
Code
TransducerCode
DG1
DG2
600
2-wire transducer without display,
Connection size code AG1-AG3/DG1-DG3
Measurement device with current output,
0-20 mA, with display
Measurement device with current output,
0-20 mA, without display
Measurement device with current output,
4-20 mA, with display
Measurement device with current output,
4-20 mA ,without display
Measurement device with relay output, with display
G1
G2
G3
AG1
AG2
AG3
Connection type
R
Connection standard
DIN 16288 (not for connection code AG3/G3)
DIN 3852
Measuring range
Sensor material
9B
Connection type (code)
3120
012
0-36 psi
013
0-58 psi
014
0-87 psi
015
0-145 psi
016
0-0.25 MPa
023
0-0.4 MPa
024
0-0.6 MPa
025
0-1 MPa
G1
R
G1
R
Connection standard (code)
Connecting element material (code)
Sensor material (code)
Accuracy class (code)
Transducer (code)
Measuring range (code)
3120
011
0-23 psi (only sensor material code A0)
D
3120
006
0-14 psi (only sensor material code A0)
C
(sensor material A3)
005
0-10 bar
Code
0,5% (sensor material A0)
004
0-6 bar
A3
Accuracy class
003
0-4 bar
A0
Ceramic sensor, PTFE coated 002
0-2,5 bar
Code
Stainless steel 1.4401, 1.4301
Connection size (code)
621
630
001
0-1.6 bar (only sensor material code A0)
9A
PVDF20
Type
620
Code
0-1 bar (only sensor material code A0)
Code
MaterialCode
Order example
611
Code
At rear of housing
1%
610
4
9A
9A
026
20
20
A3
A3
D
D
600
600
006
006
Transducer dimensions code 600 [mm]
Connection standard code 9A
SW
19
27
H1
72
67
G
G 1/4
G 1/2
G 3/4
SW
19
27
32
63
□50
H
82
79
83
H1
72
67
69
□50
H
H1
H1
39
39
63
H
88
92
H
G
G 1/4
G 1/2
Transducer dimensions code 600 [mm]
Connection standard code 9B
FPM
Ceramics
KERAMIK
FPM
Stainl. steel 1.4301
FPM
FPM
Edelstahl 1.4301
Stainl.
steel1.4401
1.4401
Edelstahl
PTFE foil
PTFE-Folie
G
SW
PVDF
PVDF
G
PVDF
PVDF
SW
Sensor construction example, sensor material code A0
Sensor construction example, sensor material code A3
Transducer dimensions [mm]
Code 610 / 611 / 620 / 621 / 630 / 631
Connection standard code 9A
Transducer dimensions [mm]
Code 610 / 611 / 620 / 621 / 630
Connection standard code 9B
G
G 1/4
G 1/2
SW
19
27
H
101
105
H1
85
80
G
G 1/4
G 1/2
G 3/4
SW
19
27
32
H
95
92
96
H1
85
80
82
79
79
□83
H
H
H1
H1
52
52
□83
G
SW
G
SW
5
3120
Dimensions Differential pressure measurement device
Code 610 / 611 / 620 / 621 / 630 [mm]
H1
108
103
G
G 1/4
Connection standard code 9B
SW
19
H
118
H1
108
79
□83
□83
H
H1
H1
41
39
G
G
SW
SW
For further transducers, accessories and other products please see our Product Range catalogue and Price List.
Contact GEMÜ.
VALVES, MEASUREMENT
AND CONTROL SYSTEMS
GEMÜ Gebr. Müller · Apparatebau GmbH & Co. KG · Fritz-Müller-Str. 6-8 · D-74653 Ingelfingen-Criesbach · Tel. +49 (0) 7940/123-0 · Telefax +49 (0) 7940/123-224
info@gemue.de · www.gemu-group.com
Should there be any doubts or misunderstandings, the German
version of this data sheet is the authoritative document!
79
H
125
129
Subject to alteration · 05/2016 · 88051218
SW
19
27
Technical data sheet
Connection standard code 9A
H
G
G 1/4
G 1/2