Overview
ST-H
ST-H
1
Overview
ST-H transducers use ultrasonic technology to measure level in
chemical storage and liquid tanks.
Benefits
•
Can be mounted on a narrow standpipe
•
Immune to corrosive and harsh environments
•
Integral temperature sensor
Application
The narrow design of the ST-H allows the transducer to be mounted
on a narrow standpipe. When mounted correctly, it is completely
protected from the process and can even be used in harsh, corros
ive environments.
During operation, the ultrasonic transducer emits acoustic pulses in
a narrow beam perpendicular to the transducer face. The level
transceiver measures the propagation time between pulse emission
and reception of the echo to calculate the distance from the trans
ducer to the material. Variations in sound velocity due to changes in
temperature within the permissible range are automatically com
pensated by the integral temperature sensor.
•
Key Applications: chemical storage, liquid tanks
ST-H · 8/2024
© Siemens AG 2024
ST-H
2
Selection and ordering data
Article No.
ST-H Ultrasonic level transducer
Continuous, non-contact, 0.3m (1ft) range, for liquids.
7ML1100-
● ● A ● 0
Click on the Article No. for the online configuration in the PIA Life Cycle Portal.
Process connection
ETFE, 2"NPT [(Taper), ASME B1.20.1] 0
ETFE, R2" [(BSPT), EN 10226] 1
ETFE, G2" [(BSPP), EN ISO 228-1] 2
PVDFcopolymer, 2"NPT [(Taper), ASMEB1.20.1] 3
PVDFcopolymer, R2" [(BSPT), EN10226] 4
PVDFcopolymer, G2" [(BSPP), ENISO228-1] 5
Cable length
5m (16.40ft) A
10m (32.81ft) B
30m (98.43ft) C
50m (164.04ft) D
100m (328.08ft) E
Approvals
FM Class I, II, Div. 1, Groups C, D, E, F, G T4A
3)
2
CSA ClassI,II,III, Div.1, GroupsA,B,C,D,E,F,GT3;
ATEXII2GExmbIICT5Gb, Ta=‑20°Cto+60°C;
UKEXII2GExmbIICT5Gb, Ta=‑20°Cto+60°C;
INMETROExmbIICT5Gb, ‑20°C≤Ta≤+60°C;
RCM,CE, UKCA, EAC Ex, KC
1)
3
ATEXII2GExmbIICT5Gb, Ta=‑20°Cto+60°C;
UKEXII2GExmb IICT5Gb, Ta=‑20°Cto+60°C;
INMETROExmbIICT5Gb, ‑20°C≤Ta≤+60°C;
CE,UKCA,EAC Ex, RCM,KC
2)
4
1)
Available with Processconnection options0...2only.
2)
Available with Process connection options3...5only.
3)
Not suitable for Ketone, Hexane, Ester or EthylAcetate atmospheres.
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.16characters) specify in plaintext
Y17
Accessories 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
Sunshield
A5E32964662
Universal box bracket, mounting kit
7ML1830-1BK
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
EasyAimer2, aluminum, NPT with ¾"x1" PVC coupling
7ML1830-1AQ
EasyAimer2, aluminum with M20adapter and 1" and
1½"BSPT aluminumcouplings
7ML1830-1AX
EasyAimer304, NPT with 1" stainlesssteel coupling
7ML1830-1AU
EasyAimer304, with M20adapter and 1" and 1½"BSPT
304stainlesssteel couplings
7ML1830-1GN
Plasticadapter 1"NPT
7ML1930-1FX
Plasticadapter 1"NPT/M20
7ML1830-1EF
ST-H · 8/2024
© Siemens AG 2024
ST-H
3
Technical specifications
ST-H
Mode of operation
Measuring principle Ultrasonic transducer
Input
Measuring range 0.3... 10 m (1... 33 ft)
Output
Frequency 44 kHz
Beam angle 12°
Accuracy
Temperature compensation Compensated by integral temperature
sensor
Rated operating conditions
Pressure Normal atmospheric pressure
Ambient conditions
Ambient temperature -20... +60 °C (-5... +140 °F) (ATEX and
UKEX approved model)
-40... +73 °C (-40 ...+163 °F) (CSA/FM
approved model)
Storage temperature -20...+60°C (-5...+140°F)
Design
Weight
1)
1.4 kg (3 lb)
Material (enclosure) Base and lid made of ETFE or PVDF (epoxy
fitted joint)
2)
Process connection 2" NPT [(Taper), ASME B1.20.1], R 2"
[(BSPT), EN 10226] or G 2" [(BSPP), ENISO
228-1]
Degree of protection IP68
Cable connection 2-core shielded/twisted, 0.519 mm² (20
AWG), PVC sheath
Cable (max. length) 365 m (1200 ft) with RG 62 A/U coaxial
cable
Options
Flange adapter 3" Universal (fits DN 65, PN 10 and 3"
ASME)
Certificates and approvals CE,UKCA,RCM,KC,
CSAClassI,II,III,Div.1,
GroupsA,B,C,D,E,F,G T3 (ETFE only);
FMClassI,II,Div.1,
GroupsC,D,E,F,GT4A;
ATEXII2GExmbIICT5Gb;
UKEXII2GExmbIICT5Gb;
INMETROExmbIICT5Gb
VLAREM II
RoHS, China RoHS, WEEE, REACH,
NSF/ANSI/CAN 61- 2022
1)
Approximate shipping weight of transducer with standard cable length
2)
When measuring chemicals, check compatibility of ETFE or PVDF and
epoxy, or mount joint external to process.
ST-H · 8/2024
© Siemens AG 2024
ST-H
4
Dimensional drawings
Flange Adapter
Coupling
Siemens
flange adapter
87 (3.4)
Diameter
Mounting thread
(process
connection)
Conduit
thread
1" NPT
20.9
(0.82)
82 (3.2)
74 (2.9)
119 (4.7)
22
(0.87)
53 (2.1)
ST-H ultrasonic transducer, dimensions in mm (inch)
Circuit diagrams
Direct connection
Coaxial extension
3 Terminal direct*
3 Terminal extension*
Black
Black
Black
White
White
White
White
Shield
Shield
Shield
Shield
* For SITRANS LUT400, MultiRanger 100/200, HydroRanger 200
ST-H ultrasonic transducer connections
ST-H · 8/2024
© Siemens AG 2024