Endress+Hauser Waterpilot FMX167 Technical Information
TI351P/00/EN/06.09
71096099
Technical Information
Waterpilot FMX167
Hydrostatic level measurement
Reliable and robust level probe with ceramic measuring cell
Compact device for level measurement in fresh water, wastewater
and saltwater
Application
The Waterpilot FMX167 is a pressure sensor for
hydrostatic level measurement.
Three versions of FMX167 are available at
Endress+Hauser:
• FMX167 with a stainless steel housing, outer diameter
of 22 mm (0.87 inch): Standard version suitable for
drinking water applications and for use in bore holes
and wells with small diameters
• FMX167 with a stainless steel housing, outer diameter
of 42 mm (1.66 inch): Heavy duty version, easy clean
flush-mounted process diaphragm. Ideally suited to
wastewater and sewage treatment plants
• FMX167 with a coated housing, outer diameter of
29 mm (1.15 inch): Corrosion resistant version
generally for use in saltwater, particularly for ship
ballast water tanks.
Your benefits
• High mechanical resistance to overload and aggressive
media
• High-precision, robust ceramic measuring cell with
long-term stability
• Climate proofed sensor thanks to completely potted
electronics and 2-filter pressure compensation system
• 4 to 20 mA output signal with integrated overvoltage
protection
• Simultaneous measurement of level and temperature
with optionally integrated Pt100 temperature sensor
• Drinking water approvals: KTW, NSF, ACS
• Approvals: ATEX, FM and CSA
• Marine certificate: GL, ABS
• Extensive range of accessories provides complete
measuring point solutions
Waterpilot FMX167
2 Endress+Hauser
Table of contents
Function and system design. . . . . . . . . . . . . . . . . . . . . 3
Device selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Measuring principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Measuring system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
System integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Measured variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Measuring range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Input signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Measuring unit electrical connection . . . . . . . . . . . . . . . . . . . . . . . 9
Supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Cable specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Residual ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Reference operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Maximum measured error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Long-term stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Influence of medium temperature . . . . . . . . . . . . . . . . . . . . . . . . 11
Warm-up period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Rise time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Settling time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Installation conditions . . . . . . . . . . . . . . . . . . . . . . . . 12
Installation instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Ambient temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Degree of protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electromagnetic compatibility (EMC) . . . . . . . . . . . . . . . . . . . . . 13
Overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Process conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Medium temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Medium temperature limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Mechanical construction . . . . . . . . . . . . . . . . . . . . . . 15
Dimensions of the level probe . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Dimensions of the mounting clamp . . . . . . . . . . . . . . . . . . . . . . . 15
Dimensions of the extension cable mounting screws . . . . . . . . . . 16
Dimensions of the terminal box IP 66/IP 67 with filter . . . . . . . . 16
Dimensions of the TMT181 temperature head transmitter . . . . . 17
Terminal box with integrated TMT181 temperature head
transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Extension cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Installation tool – indicating the customer-specific length on
the cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Certificates and approvals . . . . . . . . . . . . . . . . . . . . . 20
CE mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Ex approval,type of protection . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Drinking water approval
(for FMX167 with Outer diameter 22 mm (0.87 in)) . . . . . . . . . 20
Marine approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Standards and guidelines applied . . . . . . . . . . . . . . . . . . . . . . . . 20
Ordering information. . . . . . . . . . . . . . . . . . . . . . . . . 21
FMX167 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
FMX167 (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Mounting clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Terminal box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Additional weight
(for FMX167 with an outer diameter of 22 mm and 29 mm) . . . 22
TMT181 temperature head transmitter . . . . . . . . . . . . . . . . . . . 22
Extension cable mounting screw . . . . . . . . . . . . . . . . . . . . . . . . 23
Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Test adapter
(for FMX167 with an outer diameter of 22 mm and 29 mm) . . . 23
Additional documentation . . . . . . . . . . . . . . . . . . . . . 23
Field of activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Installation/Control Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Drinking water approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Waterpilot FMX167
Endress+Hauser 3
Function and system design
Device selection
Waterpilot FMX167
P01-FMX167xx-16-xx-xx-xx-002
P01-FMX167xx-16-xx-xx-xx-003
P01-FMX167xx-16-xx-xx-xx-004
Field of application Hydrostatic level measurement in deep
wells e.g. drinking water
Hydrostatic level measurement in
wastewater
Hydrostatic level measurement in
saltwater
"
Caution!
The Waterpilot is not suitable for use in biogas plants since the gases can diffuse through the elastomers (seals, extension
cable). Endress+Hauser offers the Deltapilot level transmitter for biogas applications.
Process connection – Mounting clamp
– Extension cable mounting screw with G1
½ A or 1 ½ NPT thread
Outer diameter 22 mm 42 mm Max. 29 mm
Extension cable – PE extension cable
–PUR extension cable
– FEP extension cable
Seals – FKM Viton
–EPDM
1)
– FKM Viton – FKM Viton
–EPDM
Measuring ranges – Nine fixed pressure measuring ranges in bar, mH
2
O, psi and ftH2O,
from 0 to 0.1 bar to 0 to 20 bar (0 to 1 mH
2
O to 0 to 200 mH2O/
0to1.5 psi to 0to300 psi/0to3 ftH
2
O to 0 to 600 ftH2O)
– Customer-specific measuring ranges; factory-calibrated
– Seven fixed pressure measuring
ranges in bar, mH
2
O, psi and ftH2O,
from 0 to 0.1 bar to 0 to 4 bar
(0 to 1 mH
2
O to 0 to 40 mH2O/
0 to 1.5 psi to 0 to 60 psi/
0 to 3 ftH
2
O to 0 to 150 ftH2O)
– Customer-specific measuring
ranges; factory-calibrated
Overload Up to 40 bar (580 psi) Up to 25 bar (362 psi)
Process temperature –10 to +70 °C 0 to +50 °C
Ambient temperature range –10 to +70 °C 0 to +50 °C
Maximum measured error ±0.2 % of upper range value (URV)
Supply voltage 10 to 30 V DC
Output 4 to 20 mA
Options – Drinking water approval
– Integrated Pt100 temperature sensor
– Integrated Pt100 temperature sensor and TMT181 temperature head transmitter (4 to 20 mA/HART)
– Marine approval
Specialties – Large selection of approvals, including ATEX II 2 G, FM and CSA
– High-precision, robust ceramic measuring cell with long-term stability
– Customer-specific cable marking
1) Recommended for drinking water applications, not suitable for use in hazardous areas
Waterpilot FMX167
4 Endress+Hauser
Measuring principle The ceramic measuring cell is a dry measuring cell, i.e. pressure acts directly on the robust ceramic process
isolating diaphragm of the Waterpilot.
Any changes in the air pressure are routed through the extension cable, via a pressure compensation tube, to
the rear of the ceramic process isolating diaphragm and compensated for. A pressure-dependent change in
capacitance caused by the movement of the process isolating diaphragm is measured at the electrodes of the
ceramic carrier. The electronics convert the movement into a pressure-proportional signal which is linear to
the medium level.
P01-FMX167xx-15-xx-xx-xx-002
Measuring principle
1 Ceramic measuring cell
2 Pressure compensation tube
h Level height
p Total pressure = hydrostatic pressure + atmospheric pressure
ρ Density of the medium
g Gravitational acceleration
p
hydr.
Hydrostatic pressure
p
atm
Atmospheric pressure
Temperature measurement with optional Pt100
1)
Endress+Hauser also offers the Waterpilot FMX167 with an optional 4-wire Pt100 resistance thermometer to
measure level and temperature simultaneously. The Pt100 belongs to Accuracy Class B in accordance with
DIN EN 60751, see also → ä 22, Sect. "Accessories.
Temperature measurement with optional Pt100 and TMT181 temperature head transmitter
To convert the Pt100 signal to a 4 to 20 mA signal, Endress+Hauser also offers the TMT181 temperature
transmitter.
h
h
h=
p
ρ • g
p
➀
➁
p
atm
p
hydr.
p+p
atm
=
p
atm
p
atm
p
hydr.
p+p
atm
=
p
hydr.
p
hydr.
–p
atm
=
p
hydr.
(+p
atm
)
Wa
t
e
r
p
i
lo
t
F
M
X
1
6
7
S
e
r
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a
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-
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:
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t
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T
.
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F
E
,
C
L
.
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,
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,
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.
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B
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.
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.
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,
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.
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=
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ty
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w
g
.
9
6
0
5
0
3
-
1
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0
9
-
1) Not for use in hazardous areas.
Waterpilot FMX167
Endress+Hauser 5
Measuring system The complete standard measuring system consists of Waterpilot and a transmitter power supply unit with
supply voltage of 10 to 30 V DC.
Possible measuring point solutions with a transmitter and evaluation units from Endress+Hauser:
P01-FMX167xx-14-xx-xx-xx-004
Application examples with FMX167
OVP = Overvoltage protection e.g. HAW from Endress+Hauser (not for use in hazardous areas)
- OVP on the sensor side for field installation: HAW569/for top-hat rail/DINrail: HAW562
- OVP on the supply side for top-hat rail/DINrail: HAW561 (115/230 V) and HAW561K (24/48 V AC/DC)
Option dependent on supply voltage.
1. Simple cost-effective measuring point solution: Power supply of Waterpilot in hazardous and nonhazardous areas using RN221N active barrier.
Power supply and additional control of two consumers, e.g. pumps, via limit switch RTA421 with onsite
display.
2. Evaluation unit RIA45 (for panel mounting) provides a power supply system, an onsite display and two
switch outputs.
3. If several pumps are used, the pump service life can be prolonged by alternate switching. With alternating
pump control, the pump which was out of service for the longest period of time is switched on. The
evaluation unit RIA452 (for panel mounting) provides this option in additional to several other functions.
4. State-of-the-art recording technology with graphic display recorders from Endress+Hauser, such as
Ecograph T, Memograph M, or paper recorders such as Alphalog for documenting, monitoring,
visualizing and archiving purposes.
ENDRESS+HAUSER
RN 221 N
ENDRESS+HAUSER
RTA 421
RN221N
RTA421
FMX167
4…20 mA
➀
➂
➁
➃
RIA45
ON
1
2
E
-+-
RIA45
RIA452
Memograph M
Ecograph T
RSG30
65.0
86.0
13.0
Channel1[%] Channel2[%] Channel3[%]
Power
supply
OP
OP
OP
OP
OP
OP
Power
supply
OP
OP
Power
supply
Power
supply
Waterpilot FMX167
6 Endress+Hauser
P01-FMX167xx-14-xx-xx-xx-005
Application examples with FMX167
OVP = Overvoltage protection e.g. HAW from Endress+Hauser (not for use in hazardous areas)
- OVP on the sensor side for field installation: HAW569/for top-hat rail/DINrail: HAW562
- OVP on the supply side for top-hat rail/DINrail: HAW561 (115/230 V) and HAW561K (24/48 V AC/DC)
Option dependent on supply voltage.
5. If you want to measure, display and evaluate the temperature as well as the level, e.g. to monitor
temperature in fresh water to detect temperature limits for germ formation, you have the following
options:
The optional TMT181 temperature head transmitter can convert the Pt100 signal to a 4 to 20 mA HART
signal and transfer it to any common evaluation unit. The RMA421, RIA45 and RIA452 evaluation units
also offer a direct input for the Pt100 signal.
6. If you want to record and evaluate the level and temperature measured value with one device, use the
RMA422, RIA45 and RIA46 evaluation units with two inputs. It is even possible to mathematically link
the input signals with this unit. These evaluation units are not HART-compatible.
System integration The device can be fitted with a tag name, see → ä 21 ff, "Ordering information", feature 995 "Marking"
version "1".
RIA452
ENDRESS+HAUSER
RMA 421
RMA421
RIA452
ENDRESS+HAUSER
RMA 421
RMA421
4…20 mA
4…20 mA
4…20 mA
Pt100
Pt100
4…20 mA
➄
➅
FMX167 + Pt100
ON
1
2
E
-+-
RIA45
ON
1
2
E
-+-
RIA45
RIA45
RIA45
ON
1
2
E
-+-
RIA45
ENDRESS+HAUSER
RMA 422
RMA422
RIA46
RIA45
12401.5
E
-+-
ON
1
2
ON
1
2
E
-+-
RIA45
ON
1
2
E
-+-
RIA45
Power
supply
Temperature
Temperature
Level
Level
OP
OP
OP
Power
supply
OP
OP
OP
OP
Power
supply
Waterpilot FMX167
Endress+Hauser 7
Input
Measured variable
Measuring range • Nine fixed pressure measuring ranges in bar, mH
2
O, psi and ftH2O;
→ ä 21, "Ordering information" Section
• Customer-specific measuring ranges; factory-calibrated
• Temperature measurement from –10 to +70 °C (optional with Pt100)
Input signal
FMX167 + Pt100 (optional) TMT181 temperature head transmitter
(optional)
• Hydrostatic pressure of a liquid
• Pt100: Temperature of a liquid
• Temperature
Sensor measuring range Lowest span that can be
calibrated
Maximum overload/OPL
1)
1) OPL: overpressure limit, depending on the weakest element, in terms of pressure, of the selected components
Vacuum resistance
[bar] [bar] [bar] [bar
abs
]
0.1 0.01 5.0 0.3
0.2 0.02 5.0 0.3
0.4 0.04 7.0 0
0.6 0.06 10.0 0
1.0 0.1 10.0 0
2.0 0.2 18.0 0
4.0 0.4 25.0 0
10.0
2)
2) These measuring ranges are not offered for the probe version with a coated housing, outer diameter 29 mm.
1.0 40.0 0
20.0
2)
2.0 40.0 0
FMX167 + Pt100 (optional) TMT181 temperature head transmitter
(optional)
• Change in capacitance
• Pt100: change in resistance
• Pt100 resistance signal, 4-wire
Waterpilot FMX167
8 Endress+Hauser
Output
Output signal
Load
Note!
When using the measuring device in hazardous areas, installation must comply with the applicable national
standards and regulations and the Safety Instructions or Installation or Control Drawings.
FMX167 + Pt100 (optional) TMT181 temperature head transmitter
(optional)
• FMX167: 4 to 20 mA for hydrostatic pressure
measured value, two-wire
• Pt100: Temperature-dependent resistance value
of the Pt100
• 4 to 20 mA for temperature measured value,
two-wire
FMX167 + Pt100 (optional) TMT181 temperature head transmitter
(optional)
P01-FMX167xx-16-xx-xx-xx-000 P01-FMX167xx-16-xx-xx-xx-001
R
tot
≤
– 2 • 0.09
•l–R
add
U – 10 V
b
0.0225 A
Ω
m
R
tot
≤ –R
add
U –8V
b
0.025 A
R
ges
= Max. load resistance [Ω]
R
add
= additional resistances such as resistance of evaluation unit and/or display unit, cable resistance [Ω]
U
b
= Supply voltage [V]
l = Simple length of extension cable [m] (cable resistance per wire ≤ 0.09 /Ωm)
P01-FMX167xx-05-xx-xx-xx-001
FMX167 load chart for estimating the load resistance.
Additional resistances, such as the resistance of the
extension cable, have to be subtracted from the value
calculated as shown in the equation.
P01-FMX167xx-05-xx-xx-xx-003
Temperature head transmitter load chart for estimating
the load resistance. Additional resistances have to be
subtracted from the value calculated as shown in the
equation.
888
444
666
222
30
20
25
10
15
R
[]Ω
[V]
U
B
30
20 25158
35
10
1080
880
480
280
680
80
R
[]Ω
[V]
U
B
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