Contact: EK Engineering (www.ekeindia.
com)
Email: india.eke@gmail.com
Mob: +91-9680966000
DE28 Differential Pressure Transmitter
Application
Measuring Transmitter for overpressu-
re, partial vacuum and differential pres-
sure of liquid and aerial media. Ranges:
0-0.4 up to 0-6 bar. This series of trans-
mitter is suitable for various measuring
applications in the field of industrial and
sanitary techniques.
Typical applications:
Measurement of differential pres-
sure between forward and return
flow in heating systems
Monitoring of filters, blowers and
compressors
Main Features A centre-mounted tappet transfers the motion of the
Overpressure protection diaphragm system to the core of an inductive displace-
Maintenance-free due to inductive ment transducer. The subsequent converter circuit con-
movement verts this motion into an electrical output signal 0(4) - 20
Multiple applications mA linear, 3-wire connection. The transmitter is reverse
rugged design battery and short circuit protected.
Construction and Operation
This transmitter is based on a rugged
Block Schematic Diagram
and uncomplicated diaphragm move-
ment. The operating principle of the sy-
stem is identical for all applications of
this type. In a state of equilibrium, the 1 pressure
forces of the springs on both sides of the chamber
diaphragm are balanced. 2 inductive
displacement
The pressure or differential pressure to transducer
be measured creates an unbalanced 3 measuring springs
4 measuring
force of the springs for the measuring
diaphragm
range until a new equilibrium is reached.
Contact: EK Engineering (www.ekeindia.com)
Email: india.eke@gmail.com
Mob: +91-9680966000
Specifications
General
Measuring ranges 0-0.4 0-0.6 0-1 0-1.6 0-2.5 0-4 0-6 bar
Nominal pressure 16 bar
Max. pressure load one-sided overpressure protected up to nominal pressure,
on (+) and (-) side of diaphragm, partial vacuum protected
Permissible ambient temperature 0 up to +70 C
Max. storage temperature 70 C
Protection class IP54 per DIN EN 60529
Linearity 2% FS
Hysteresis 1% FS
Electrical
Electrical connection 3-wire
Operating voltage 24 V DC / AC 24 V DC / AC
range 15...30 V DC range 15...30 V DC
20...30 V AC 20...28 V AC
Output signal 0...20 mA 0...10 V
4...20 mA
Load 380 for all 2K
operating voltages
Connections
Pressure connection female thread G 1/8
cutting ring connection (brass) for 6mm tube
cutting ring connection (brass) for 8mm tube
Electrical connection fixed numbered cable, prewired
Materials
Case material polycarbonate
Pressure chamber brass
Measuring diaphragm NBR / Viton®
Mounting
Mounting position upright, pressure ports downward
Measuring transmitter is reverse battery and short circuit protected.
Electrical Connection
7MKREP
Contact: EK Engineering (www.ekeindia.com)
Email: india.eke@gmail.com
Mob: +91-9680966000
Dimensions (all units in mm unless stated otherwise)
cutting ring connection for ø 6 mm M12x1.5 cable gland
Contact: EK Engineering (www.ekeindia.com)
Email: india.eke@gmail.com
Mob: +91-9680966000
Ordering Code
Differential Pressure Transmitter DE28 L 0 0 0 0
Measuring Range
0 ... 400 mbar ....................................................................> 8 3
0 ... 0.6 bar ....................................................................> 0 1
0 ... 1 bar ....................................................................> 0 2
0 ... 1.6 bar ....................................................................> 0 3
0 ... 2.5 bar ....................................................................> 0 4
0 ... 4 bar ....................................................................> 0 5
0 ... 6 bar ....................................................................> 0 6
Pressure Chamber / Gaskets
pressure chamber, measuring diaphragm, gasket: Ms/NBR.............> M
pressure chamber, measuring diaphragm, gasket: Ms/Viton® ..........> N
Pressure Connection
Female thread G 1/8 ............................................................................... > 0 0
Cutting ring connection (brass) for 6mm tube ......................................... > 2 8
Cutting ring connection (brass) for 8mm tube ......................................... > 2 9
Electrical Connection
Numbered cable, 1m, prewired ................................................................................ > 1
Numbered cable, 2.5m, prewired ............................................................................. > 2
Numbered cable, 5m, prewired ................................................................................ > 5
Output Signal
0 - 20 mA linear, 3-wire connection.................................................................................. > A
4 - 20 mA linear, 3-wire connection.................................................................................. > P
0 - 10 V DC linear, 3-wire connection............................................................................... > C
Power supply
24 V DC / AC........................................................................................................................... > L
Technische Änderungen vorbehalten Subject to change without notice Changements techniques sous réserve
Fischer Mess- und Regeltechnik GmbH Bielefelder Str. 37a D-32107 Bad Salzuflen Tel. +49 5222 9740 Fax +49 5222 7170 eMail: info@fischermesstechnik.de www.fischermesstechnik.de
