Siemens Building Technologies 7MF15654 Series Instruction Sheet
7MF15654 Series
Pressure Transmitter,
PSIG Range for Sensing
Liquid/Gas
Technical Instructions
Document No. 155-768
January 18, 2012
Description
Features
Application
Product Numbers
The 7MF15654 Series Pressure Transmitters measure the gauge pressure of
aggressive and non-aggressive gases as well as the level of liquids and vapors.
• High measuring accuracy
• Sturdy stainless steel housing
• For aggressive and non-aggressive media
• Measures the pressure of liquids, gases and vapor
• Temperature-compensated measuring cell
• Compact design
The 7MF15654 Series Pressure Transmitters are mainly used in the U.S. market for the
following industrial areas:
• Chemical industry
• Pharmaceutical industry
• Food industry
• Mechanical engineering
• Water supply
Table 1.
Product Number Description
7MF15654XX005EA1 Sensor, Liquid/Gas, 4 to 20 mA
7MF15654XX105EA1 Sensor, Liquid/Gas, 0 to 10 Vdc
XX = BB 0 to 15 PSI
BE 0 to 30 PSI
BF 0 to 60 PSI
BG 0 to 100 PSI
CA 0 to 150 PSI
CB 0 to 200 PSI
CD 0 to 300 PSI
Siemens Industry, Inc.
Technical Instructions 7MF15654 Pressure Transmitter, PSIG Range for Sensing Liquid/Gas
Document Number 155-768
January 18, 2012
Design
Measuring range
<1 bar (<14.5 psi)
Measuring range
> 1 bar (> 14.5 psi)
The design of the pressure transmitter is dependent on the measuring range.
The main components of the pressure transmitter are:
• Stainless steel housing with piezo-resistive silicon measuring cell (with stainless
steel diaphragm, temperature-compensated) and electronics module.
• Stainless steel process connection 1/4 - 18 NPT Straight.
• Electrical connection is made to DIN 43650 with the cable inlet 1/2 – 14 Taper.
Pressure transmitters with a nominal range < 1 bar g (< 14.5 psi g) are available with or
without explosion protection.
The main components of the pressure transmitter are:
• Stainless steel housing with ceramic measuring cell and electronics module. The
temperature-compensated ceramic measuring cell has a thin-film strain gauge
which is mounted on a ceramic diaphragm. The ceramic diaphragm can also be
used for aggressive media.
• Stainless steel process connection 1/4 - 18 NPT Straight.
Electrical connection is made to DIN 43650 with the cable inlet 1/2 – 14 Taper.
Pressure transmitters with a nominal range
> 1 bar g (>14.5 psi g) are available with or
without explosion protection.
Function
Mode of Operation
Measuring range <1 bar
(<14.5 psi)
The pressure transmitter measures the gauge pressure as well as the level of liquids
and gases.
U
const.
p
SEN0444R1
U
I
U
I
1
B0
Figure 1. Functional Diagram.
The mode of operation of the pressure transmitter is dependent on the measuring
range.
The silicon measuring cell of the pressure transmitter has a piezo-resistive bridge to
which the operating pressure is transmitted through silicone oil and a stainless steel
diaphragm.
The measuring cell output voltage is fed to an amplifier and converted into a 4 to 20 mA
output current.
The output is linearly proportional to the input pressure.
Page 2 Siemens Industry, Inc.
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