Siemens Building Technologies Pressure Sensors for Liquid and Gas Data Sheet
Pressure Sensors for Liquid and Gas
7MF Series
Pressure Sensor.
Description
The 7MF Series Pressure Sensors are suitable for the
measurement of static and dynamic positive pressure in
HVAC facilities, particularly in hydraulic and pneumatic
systems using liquid or gaseous media (steam applications).
The 7MF Series Pressure Sensors are available in several
different pressure ranges, from 0-15 psid to 0-300 psid.
Features
• Piezo-resistive measuring system
• 0 to 10 Vdc and 4 to 20 mA output signals
• Measurement unaffected by changes in temperature
• High temperature stability
• No mechanical aging or creepage
• Excellent EMC characteristics
Applications
The 7MF Series Pressure Sensors are used for the
following applications:
• Heating, Ventilation and Air Conditioning (HVAC)
• Energy Management Systems
• Chiller, Boiler and Steam Applications
E-49
Sensors
www.usa.siemens.com/hvac
7MF Specifications
E-50
Power Supply
Supply Voltage .................................................................. DC 16...33 V
Max. Voltage Tolerance ..............................................±15 % at AC 24 V
Current Consumption ...................................................................<4 mA
Output Signal
4 to 20 mA ............... two-wire connection; power supply DC 10 to 36V
0 to 10 V ................ three-wire connection; power supply DC 15 to 36V
Application Range ..................................0 to 40 bar, refer to table below.
Accuracy ........................................................................ (FS = Full Scale)
Total of linearity, hysteresis
and reproducibility ............................................................... <±0.3 % FS
Zero point offset voltage ............................................................. <30 Mv
Temperature Drift
TC zero point ................................................<±0.015 % FS/K (typically)
TC sensitivity ................................................<±0.015 % FS/K (typically)
Response Time ............................................................................... <2 ms
Nominal Pressure ................................ Relative pressure as in “Ordering
Information” (measurement of difference
from ambient pressure)
Max. Admissible Pressure and
Rupture Pressure ................................ 3 x scale end value of measuring
range (FS) <4 bar
2.5 x scale end value of
measuring range (FS) >4 bar
7MF Series Product Ordering
Media ...........................................................Neutral and slightly corrosive
liquids and gases
Admissible temperature of medium ........ -40 to +239°F (-40 to +125°C)
Maintenance .................................................................. Maintenance-free
Mounting Position .......................................................................Optional
Connecting Cable ........... PVC, length 5 ft., 3 x 0.25 mm2 stranded wires
Screwed Fitting ....................................................... External thread G1⁄2"
Operation to Climatic Conditions
Temperature .......................................................................-40 to +85°C
Humidity ..................................................................................<95% RH
Storage/transport Climatic Conditions
Temperature .......................................................................-40 to +85°C
Humidity ..................................................................................<95% RH
CE conformity to EMC Directive ..........................................89/336/EEC
N474 Conformity to
Australian EMC Framework .................Radio Communication Act 1992
Radio Interference Emission Standard.............................AS/NZS 3548
Base .....................................................................Stainless Steel (1.4305)
Measuring Element..................................................Ceramics diaphragm
Cover ...................................................................Stainless Steel (1.4305)
Sealant .......................................................................... FPM (Viton) spec.
Shipping Weight ............................................................0.53 lb. (0.24 kg)
Pressure
Range (psi)
0 - 15 PSI
Sensors
0 - 30 PSI
0 - 60 PSI
0 - 100 PSI
0 - 150 PSI
0 - 200 PSI
0 - 300 PSI
Output Signal Part No.
4-20ma 7MF156544BB005EA1
0-10 V 7MF156544BB105EA1
4-20ma 7MF156544BE005EA1
0-10 V 7MF156544BE105EA1
4-20ma 7MF156544BF005EA1
0-10 V 7MF156544BF105EA1
4-20ma 7MF156544BG005EA1
0-10 V 7MF156544BG105EA1
4-20ma 7MF156544CA005EA1
0-10 V 7MF156544CA105EA1
4-20ma 7MF156544CB005EA1
0-10 V 7MF156544CB105EA1
4-20ma 7MF156544CD005EA1
0-10 V 7MF156544CD105EA1
www.usa.siemens.com/hvac
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