Continuous level measurement
Overview
Ultrasonic / Ultrasonic transmitters / The Probe
Continuous level measurement
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Overview
The Probe is a short-range integrated ultrasonic level transmitter,
ideal for liquids and slurries in open or closed vessels.
Benefits
•
Easy to install, program, and maintain
•
Accurate and reliable
•
Sanitary models available
•
Sonic Intelligence echo processing
•
Integral temperature compensation
Application
The transducer is available in PVDF copolymer, making the device
suitable for use in a wide variety of applications. The Probe is easy
to install and maintain, and can be quickly removed for cleaning as
required by the food, beverage and pharmaceutical industries.
The reliability of the level data is based on the Sonic Intelligence
echo processing algorithms. A filter discriminates between the true
echo and false echoes from acoustic or electrical noises and agitator
blades in motion. The ultrasonic pulse propagation time to the
material and back is temperature-compensated and converted into
distance for display, analog output and relay actuation.
•
Key Applications: chemical storage vessels, filter beds, mud pits,
liquid storage vessels, food applications
Configuration
Beam angle
Seams
Rungs
Pipe
Fill
Flat mounting and beam angle
Parabolic mounting
12°
The Probe mounting
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Level Measurement
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Continuous level measurement
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Selection and ordering data
Article No.
The Probe Ultrasonic level transmitter
Continuous, non-contact, 5m (16.4ft) range. Monitors level
for liquids and slurries. With 3-wire relay output.
7ML1201-
● ● ● 0 0
Click on the Article No. for the online configuration in the PIA Life Cycle Portal.
Measuring range
5m (16.40ft) 1
Transducer/Process connection
PVDFcopolymer, 2"NPT [(Taper),ASMEB1.20.1] E
PVDFcopolymer, R2" [(BSPT),EN10226] F
PVDFcopolymer, G2" [(BSPP),ENISO228-1] G
PVDFcopolymer, 4"Sanitarymounting J
Model/Approval
3-wire, 24 V DC, CE, UKCA, RCM, CSA, FM E
Selection and Ordering data Order code
Further designs
Please add "-Z" to Article No. and specify Order code(s).
Acryliccoated, stainlesssteeltag [13x45mm
(0.5x1.75inch)]: Measuring-pointnumber/identification
(max.20characters) specify in plaintext
Y17
Selection and ordering data Article No.
Operating Instructions
All literature is available to download for free, in a range
of languages, at
http://www.siemens.com/processinstrumentation/docu
mentation
Accessories
Universal Box Bracket Mounting kit
7ML1830-1BK
Sanitary 4" mounting clamp
7ML1830-1BR
3"ASME, DN65 PN10, JIS10K3B ETFE Flangeadapter for
2"NPT
7ML1830-1BT
3"ASME, DN65 PN10, JIS10K3B ETFE Flangeadapter for
2" BSPT
7ML1830-1BU
2"NPT nylon plastic locknut
7ML1830-1DT
2"BSP nylon plastic locknut
7ML1830-1DQ
Plastic M20 cablegland with metal locknut
7ML1930-1DB
SITRANSRD100, loop powered display - seeChapter7
7ML5741-.....-.
SITRANSRD150, remote digital display for 4...20mA and
HART devices - seeChapter7
7ML5742-.....-....
SITRANSRD200, universal input display with Modbus con
version - seeChapter7
7ML5740-.....-..
SITRANSRD300, dual line display with totalizer and linear
ization curve and Modbus conversion - seeChapter7
7ML5744-.....-..
For applicable back up point level switch see
pointlevelmeasurement section.
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Level Measurement
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Continuous level measurement
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Technical specifications
The Probe
3-wire version
Mode of operation
Measuring principle Ultrasonic level measurement
Input
Measuring range 0.25... 5 m (0.8... 16.4 ft)
Frequency 54 kHz
Output
mA 4... 20 mA
•
Span Proportional/
inversely proportional
•
Max. load 750 Ω at 24 V DC
Relay For level alarm or fault
Power supply
Supply voltage 18... 30 V DC, max. 0.2 A
Max. power consumption 5 W (200 mA at 24 V DC)
Certificates and approvals CE, UKCA, RCM,
C
CSA
US
, FM
Accuracy
Error in measurement 0.25 % of measuring range (in air)
Resolution 3 mm (0.125inch)
Temperature compensation Built in
Echo processing Sonic Intelligence
Rated operation conditions
Beam angle 12°
Ambient temperature
•
Standard -40... +60 °C (-40... +140 °F)
•
Metallic mounting -20... +60 °C (-4... +140 °F)
Storage temperature
•
Standard -40... +60 °C (-40... +140 °F)
•
Metallic mounting -20... +60 °C (-4... +140 °F)
Max. static operating pressure Normal atmospheric pressure
Degree of protection IP65
Design
Weight
•
Without flange adapter 1.5 kg (3.3 lb)
•
With flange adapter 1.7 kg (3.7 lb)
Material
•
Electronics enclosure PVC
•
Transducer PVDF copolymer
Degree of protection IP65
Process connection
•
2" NPT [(Taper), ASME B1.20.1]
•
R 2" [(BSPT), EN 10226]
•
G 2" [(BSPP), EN ISO 228-1]
•
4" sanitary
Flange adapter 3" Universal (fits DN 65, PN 10 and 3"ASME)
Cable inlet 2 inlets for PG 16 or ½" NPT cable glands
Options
190.2 (7.49)
diameter
148.8 (5.86)
bolt hole circle
diameter
Flange adapter for mating 2" NPT or 2" BSP process connections to
3" ASME, DN 65 PN10, and JIS 10K 3B flanges
The Probe optional flange adapter, dimensions in mm (inch)
The Probe with FMS 200 mounting bracket
The Probe with optional mounting bracket
Siemens FI01 · 2023
Level Measurement
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Continuous level measurement
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Dimensional drawings
Mounting
thread
Cable entry
‘knock out’
Mounting
thread
Transducer
Electronics
Cable entry
‘knock out’
Transducer
Process
connection
Electronics
Hinged
lid
Sanitary model
Hinged lid
Standard model
53 (2.1) max.
84 (3.3) max.
53 (2.1) max.
84 (3.3) max.
74
(2.9)
279 (11)
7 (0.3)
61 (2.4)
87
(3.4) Ø
117 (4.6)
279 (11)
7 (0.3)
74
(2.9)
61 (2.4)
87
(3.4) Ø
117 (4.6)
The Probe, dimensions inmm (inch)
Circuit diagrams
mA output: 4 ... 20 mA, non-
isolated, 750 Ω max.
3 wire model
(standard and sanitary models)
Units
LOE/faultOperation
status
'4' key
'20' key
Program
mode
Segment
display
Display
Relays: dry contact, closed
unpowered or alarm state
Connect to protective earth
Power supply
The Probe connections
Siemens FI01 · 2023
Level Measurement
© Siemens AG 2023