- Ranges: 0...100 mbar to 0...20 bar
- Output signal: 4...20 mA, 2-wire
- Global error: < 0,2% F.S.
- Response time: 200 ms
- (other available on request)
- Supply voltage: 9...32V DC, max. 30 mA
- Ambient temperature: -25...80 °C
- (-25...70 °C at EEx ia IIC T4)
- (-25...50 °C at EEx ia IIC T6)
- Thermal drift: < 0,015%/K F.S.
- Housing: stainless steel, 1.4404, IP 68
- Weight of probe: approx. 0,2 kg
- Weight of cable: 0,5 kg / 10m
- Electr. connection: HDPE cable with pressure compensation capillary
 Datasheet |
- Ranges: 0...100 mbar to 0...20 bar
- Output signal: 4...20 mA, 2-wire
- Global error: < 0,2% F.S.
- Response time: 200 ms (other available on request)
- Supply voltage: 12...30V DC, max. 30 mA
- Ambient temperature:
- -25...80 °C
- (-25...70 °C at EEx ia IIC T4)
- (-25...50 °C at EEx ia IIC T6)
- Thermal drift: < 0,015%/K F.S.
- Housing: stainless steel, 1.4404, IP 68
- Weight of probe: approx. 0,3 kg
- Weight of cable: 0,5 kg / 10m
- Electr. connection: PE cable with pressure compensation capillary and filter
| Datasheet |
- Cost optimized for standard applications
- 22 mm Ø ideal for 1" pipes
- Smallest measuring range: 0…250 mbar / 0…2,5 mH2O
- Largest measuring range: 0…20 bar / 0…200 mH2O
- Negative pressure measuring range: up to -1 bar
- Accuracy ≤ 0,5%
- Analog output: 4…20 mA, 2-wires
0…10 V, 3-wires
0...5 V, 3-wires
0,5...4,5 V, ratiometric - Optionally integrated PT100 / PT1000 Sensor for temperature measurement
 Datenblatt
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Bedienungsanleitung
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- Dry gold plated ceramic sensor
- Smallest measuring range: 0…100 mbar / 0…1 mH2O
- Largest measuring range: 0…20 bar / 0…200 mH2O
- Accuracy ≤ 0,3%
- High overload capability
- Rugged design
- Analog output: 4…20 mA, 2-wires
- Optionally integrated PT100 / PT1000 sensor for temperature measurement
| Datasheet |
| User Manual |
- Welded metallic measuring cell
- Smallest measuring range: 0…200 mbar/ 0…2 mH2O
- Largest measuring range: 0…20 bar/ 0…200 mH2O
- Configurable measuring ranges
- Accuracy ≤ 0,25%
- Analog output: 4…20 mA with HART Communication
- Optionally integrated PT100 / PT1000 Sensor for temperature measurement
- Ex II 1G Ex ia IIC T4 / T6 Ga
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User Manual
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- Dry capacitive ceramic sensor
- Smallest measuring range: 0…40 mbar / 0…0,4 mH2O
- Largest measuring range: 0…60 bar / 0…600 mH2O
- Accuracy ≤ 0,2%
- Analog output: 4…20 mA, 2-wires 0…10 V, 3-wires
- Optionally integrated PT100 / PT1000 Sensor for temperature measurement
- Optionally with lightning protection against voltage peaks
- Additional variations available in plastic (PP, PVDF)
- DNV-GL certified
- Ex II 1G Ex ia IIC T4 Ga I M2 Ex ia I Mb
| Datasheet |
- PP housing (Polypropylene)
- Smallest measuring range: 0…40 mbar / 0…400 mmH2O
- Largest measuring range: 0…60 bar / 0…600 mH2O
- Accuracy ≤ 0,2%
- Analog output: 4…20 mA, 2-wires 0…10 V, 3-wires
- Optionally integrated PT100 / PT1000 Sensor for temperature measurement
- Optionally with lightning protection against voltage peaks
| Datasheet |
- nominal pressure: 0 ... 1 mH2O up to 0 ... 250 mH2O
- accuracy: 0.35 % (opt. 0.25 %) FSO
- diameter 19 mm for cramped areas e.g. 1" observation well
- small thermal effect
- excellent linearity
- excellent long term stability
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 1 mH2O up to 0 ... 250 mH2O
- accuracy: 0.35 % (opt. 0.25% / 0.1 %) FSO
- diameter 26.5 mm
- small thermal effect
- excellent long term stability
- high accuracy
| Datasheet |
| User Manual |
| User Manual |
- nominal pressure: 0 ... 1 mH2O up to 0 ... 250 mH2O
- nominal temperature from 0 ... 30 °C up to 0 ... 70 °C
- accuracy: 0.35 % (opt. 0.25 %) FSO
- diameter 26.5 mm
- separate output signals for pressure and temperture ranges
- easy handling
- low maintenance and wiring costs
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 1 mH2O up to 0 ... 250 mH2O
- accuracy: 0.35 % (opt. 0.25% / 0.1 %) FSO
- diameter 35 mm
- cable and sensor section detachable
- excellent long term stability
- high accuracy
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 6 mH2O up to 0 ... 200 mH2O
- accuracy: 0.5 % FSO
- diameter 17 mm
- excellent long term stability
- suitable for hydrostatic level measurement e.g. 3/4" pipes
- excellent linearity
| Datasheet |
| User Manual |
- nominal pressure: 0 ...4 mH2O up to 0...200 mH2O
- accuracy: 0.1 % FSO
- diameter 35 mm
- cable and sensor section detachable
- thermal error in compensated range -20...70°C: 0.2 FSO TC 0.02% FSO/10K 0,02 % FSO / 10K
- high accuracy
- communication connection
- turn-down 1:10
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 4 mH2O up to 0 ... 250 mH2O
- accuracy: 0.5 % FSO
- diameter 27 mm
- excellent linearity
- excellent accuracy
- easy handling
| Datasheet |
| User Manual |
- nominal pressure: from 0 ... 4 mH2O up to 0 ... 250 mH2O
- nominal temperature from 0 ... 30 °C up to 0 ... 70 °C
- accuracy: 0,5 % FSO
- diameter 26,5 mm
- separate output signals for pressure and temperture ranges
- excellent accuracy
- easy handling
- low maintenance and wiring costs
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 40 cmH2O up to 0 ... 100 mH2O
- accuracy: 0.35 % (opt. 0.25 %) FSO
- diameter 39.5 mm
- cable and sensor section detachable
- especially for sewage, viscous and pasty media
| Datasheet |
| User Manual |
- nominal pressure range 0 ... 60 cmH2O up to 0 ... 100 mH2O
- accuracy: 0.1 %
- diameter 39,5 mm
- cable and sensor section detachable
- HART®-communication (setting of offset. span and damping)
- permissible temperatures up to 85 °C
- high long term stability
| Datasheet |
| User Manual |
- Füllhöhe 0 ... 60 cmH2O bis 0 ... 200 mH2O
- Genauigkeit: 0,1 % FSO
- Durchmesser 39,5 mm
- HART®-Kommunikation (Einstellung von Offset, Spanne und Dämpfung)
- Temperatureinsatzbereich bis 85 °C
- hoch überlastfähig
- hohe Langzeitstabilität
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User Manual
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- nominal pressure: 0 ... 60 cmH2O up to 0 ... 200 mH2O
- accuracy: 0.1 % FSO
- shipping approvals: American Bureau of Shipping (ABS), Bureau Veritas (BV), China Classification Society (CCS), Det Norske Veritas (DNV), Germanischer Lloyd (GL), Lloyd's Register (LR)
- diameter 39.5 mm
- HART®-communication (setting of offset,span and damping)
- high overpressure capability
- high long term stability
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 40 cmH2O up to 0 ... 200 mH2O
- accuracy: 0.35 % (opt. 0.1 %) FSO
- diameter 39.5 mm
- shipping approvals: American Bureau of Shipping (ABS), Bureau Veritas (BV), China Classification Society (CCS), Det Norske Veritas (DNV), Germanischer Lloyd (GL), Lloyd's Register (LR)
- high overpressure capability
- high long term stability
- permissible temperatures up to 125 °C
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 4 mH2O up to 0 ... 100 mH2O
- accuracy: 0.5 % FSO
- diameter 35 mm
- excellent long term stability
- easy handling
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 1 mH2O up to 0 ... 100 mH2O
- accuracy: 0.35 % (opt. 0.25 %) FSO
- diameter 35 mm
- cable and sensor section detachable
- excellent linearity
- small thermal effect
- integrated lightning protection and increased overvoltage protection; 8 kA gas discharge tube (8/20 μsec); 4 kV surge l-l/l-e according to EN61000-4-5
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 40 cmH2O up to 0 ... 100 mH2O
- accuracy: 0.35 % (opt. 0.25 %) FSO
- diameter 45 mm
- chemical resistance
- high overpressure capability
- pure ceramic sensor
- especially for tank level measurement of viscous and aggressive media
- housing material PP-HT or PVDF
- diaphragm ceramics Al2O3 (99.9 %)
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 40 cmH2O up to 0 ... 100 mH2O
- accuracy: 0.35 % (opt. 0.25 %) FSO
- diameter 45 mm
- cable and sensor section detachable
- chemical resistance
- housing PP-HT
- integrated lightning protection and increased overvoltage protection; 8 kA gas discharge tube (8/20 μsec); 4 kV surge l-l/l-e according to EN61000-4-5
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Datasheet
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User Manual
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- Easy installation and use due to compact design and corrosion-resistant material
- Safe application due to vent pipe in connection cable to prevent condensate formation
- Long service life due to protection of the measuring diaphragm against external influences by protective cap
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Datasheet
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User Manual
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- nominal pressure: 0 ... 1 mH2O up to 0 ... 250 mH2O
- accuracy: 0.35% (opt. 25 %) FSO
- output signal: RS485 with Modbus RTU protocol
- diameter diameter 26.5 mm
- small thermal effect small thermal effect
- high accuracy excellent accuracy
- excellent long term stability
- reset function
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Datenblatt
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Bedienungsanleitung
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- nominal pressure: from 0 ... 1 mH2O up to 0 ... 40 mH2O
- accuracy: 0.25 % (Opt. 0.1 %) FSO
- digital output signal i2C / bus frequency max. 400 kHz
- minimal current consumption: 0.15 mA @ 2.7 V
- diameter 26.5 mm
- small thermal effect
- high accuracy
- excellent long term stability
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 40 cmH2O up to 0 ... 200 mH2O
- accuracy: 0.35 % (opt. 0.25 %) FSO
- output signal: RS485 with Modbus RTU protocol
- diameter 39,5 mm
- excellent long-term stability
- especially for sewage, viscous and pasty media
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Datasheet
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User Manual
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- nominal pressure: 0 ... 1 mH2O up to 0 ... 100 mH2O
- accuracy: 0.35% (opt. 0.35 %) FSO
- output signal: RS485 with Modbus RTU protocol
- diameter diameter 22 mm
- excellent long term stability good long term stability
- highly appropriated for sewage water
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 40 cmH2O up to 0 ... 200 mH2O
- accuracy: 0.35 % (opt. 0.25 %) FSO
- diameter 39.5 mm
- especially for sewage, viscous and pasty media
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Datasheet
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Bedienungsanleitung
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- nominal pressure: von 0 ... 1 mH2O bis 0 ... 100 mH2O
- accuracy: 0.35 % (opt. 0.25 %) FSO
- HART®-communication
- excellent long term stability
- diameter 22 mm
- highly appropriated for waste water
| Datasheet |
| User Manual |
- nominal pressure: from 0 ... 1 mH2O up to 0 ... 100 mH2O
- accuracy: 0.35 % (opt. 0.25 %) FSO
- diameter 22 mm
- diaphragm ceramics Al2O3 (99.9 %)
- excellent long term stability
- highly appropriated for wastewater, sludge and viscous media
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 1 mH2O up to 0 ... 100 mH2O
- accuracy: 0.25 % FSO
- output signal 4 ... 20mA / 2-wire
- diameter 22 mm
- shipping approvals: LR (Lloyd´s Register), DNV(Det Norske Veritas), GL (Germanischer Lloyd), ABS (American Bureau of Shipping), CCS (China Classification Society)
- high long term stability
- diaphragm ceramics Al2O3 (99.9 %)
| Datasheet |
| User Manual |
- nominal pressure: from 0 ... 6 mH2O up to 0 ... 200 mH2O
- diameter 21 mm
- excellent linearity
- excellent long term stability
- accuracy: 0,5% FSO
- suitable for hydrostatic level measurement e.g. 3/4" pipes
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 1 mH2O up to 0 ... 100 mH2O
- accuracy: 0.35 % (opt. 0.25 %) FSO
- diameter 35mm
- diaphragm ceramics Al2O3 (99.9 %)
- cable and sensor section detachable
- excellent long term stability
- integrated lightning protection 8 kA gas discharge tube (8/20µsec); 4 kV surge l-l/l-e according to EN61000-4-5
| Datasheet |
| User Manual |
- nominal pressure: 0 ... 4 mH2O up to 0 ... 200 mH2O
- accuracy: 0,1 % FSO
- diameter 26,5 mm
- small thermal effect
- excellent accuracy
- excellent long term stability
| Datasheet |
| User Manual |
- Easy installation and use due to compact design and corrosion-resistant material
- Safe application due to vent pipe in connection cable to prevent condensate formation
- Long service life due to protection of the measuring diaphragm against external influences by protective cap
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Datasheet
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User Manual
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- Suitable for all level measurements in hazardous areas
- Explosion protection in accordance with IECEx, ATEX and CSA
- Shipbuilding approval in accordance with GL
- Ingress protection IP68 up to 300 m immersion depth
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User Manual
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- Suitable for measurements in contaminated and aggressive media
- An optimised discharge behaviour and a large pressure port prevent the instrument from clogging and ensure a
minimum maintenance effort - Can be used in explosion-protected areas
- Developed for wireless applications
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- Precise and reliable
- Integrated temperature measurement (option)
- Design out of Hastelloy® and FEP cable for especially high resistance (option)
- Ingress protection IP68 permanently up to 300 m water column
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User Manual
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No longer available.
- Slender design
- Scaleable measuring range (option)
- Resistant against harshest environmental conditions
- Reliable and secure by double-sealed design
- Titanium case for especially high resistance (option)
| Datasheet |
| User Manual |
Submersible Level Transmitters – hydrostatic level measurement for water, wastewater & processes
Submersible level transmitters (hydrostatic sensors) measure liquid level via hydrostatic pressure—ideal for wells/groundwater, wet wells, tanks, wastewater plants, process water and industrial services. Benefits: robust, easy to install, long-term stable, no moving parts.
Options (model-dependent): vented (gage) or absolute cells, housings in 316L/Hastelloy®/titanium, ceramic or metal diaphragms, cables in PUR/PE/FEP/PTFE, IP68, ATEX/IECEx, SIL, ranges 0.1…100 mH₂O, accuracy to ±0.1 % FS, signals 4–20 mA/HART, Modbus/RS-485, SDI-12, IO-Link.
ICS Schneider Messtechnik supports selection, sizing (density/T compensation), installation (stilling well, sinker weight), calibration, surge/lightning protection and integration into PLC/SCADA/IIoT.
FAQ on Submersible Level Transmitters
Answers on operating principle, vented vs. absolute, accuracy, cables/materials, installation, compensation, hygiene/ATEX, calibration and best practices.
How does a submersible work?
The probe senses the liquid’s hydrostatic pressure at the diaphragm. From pressure and density the level height is calculated. Vented probes reference atmospheric pressure via a capillary tube in the cable.
Vented (gage) or absolute—which should I choose?
| Variant | Advantages | Notes |
|---|---|---|
| Vented | Direct level signal, no baro correction | Keep reference filter dry/clean |
| Absolute | Hermetically sealed, no capillary | Needs external barometric sensor or software correction |
What accuracy is realistic?
Typically ±0.1…0.25 % FS (long-term drift depends on cell). Practical results depend on density/temperature, surface turbulence and installation.
What measuring ranges are available?
Standard ranges from 0.1 m to >100 mH₂O. Use low-pressure variants for shallow basins and high-pressure versions for deep wells.
Which diaphragm/housing materials make sense?
- 316L for water, beverages and many media
- Hastelloy®/titanium for corrosive chemicals/seawater
- Ceramic diaphragms with high overload resistance and media compatibility
Which cable types can I choose?
| Cable jacket | Temperature (typ.) | Application |
|---|---|---|
| PUR/PU | −20…+80 °C | Water/wastewater, robust, abrasion-proof |
| PE/PVC | −10…+70 °C | Cost-effective, utilities/HVAC |
| FEP/PTFE | −50…+100/200 °C | Chemicals, CIP/SIP environments |
How do I install submersibles correctly?
- Use a calm zone or stilling well, away from inlets/agitators.
- Route the cable strain-free, use a sinker weight/clamps, respect bend radius.
- Place the reference filter (vented) above the highest level and keep it dry.
How does density affect the measurement?
Level is directly proportional to density. If density varies (temperature/medium), apply compensation or a density curve; alternatively switch to radar-based measurement.
How is temperature compensation handled?
Modern probes feature T-compensation. Remaining errors can be minimized with damping and volume linearization in the transmitter/control system.
How do I protect against surges/lightning?
Use surge protectors in junction boxes/panels, ensure bonding/grounding and properly earth shielded cables.
Which accessories are useful?
- Stilling wells for stable readings
- Sinker weights, cable clamps, strain relief
- Junction boxes with desiccant/vent filters
- Strainers/check valves for harsh media
How is the electrical connection made?
Typically 4–20 mA/HART (2-wire) or Modbus/RS-485/SDI-12 (environmental). IO-Link for parameterization/diagnostics in machinery.
How do I calibrate/adjust properly?
Check zero in air (vented), verify span against a known water column. For absolute probes include barometric correction. Document results.
How often should I calibrate?
Typically annually depending on QA. After mechanical events (shock/overload) or medium changes, re-verify.
Are ATEX/IECEx & SIL versions available?
Yes—many probes are available in Ex i/Ex d and with SIL ratings. In hazardous areas use appropriate isolators/barriers and respect device categories.
What should I consider for hygiene/food?
316L, polished surfaces, flush diaphragms, FDA/EU 1935/2004 seals, CIP/SIP resistance; provide the respective certificates.
How do I handle condensation in the vent tube?
Replace desiccant/filters regularly, mount the junction box splash-proof, and add a drip loop to the cable.
How do I reduce noise from sloshing/surface waves?
Enable damping (time constant) in the transmitter, use a stilling well, and install away from inflows.
What ingress protection is common?
Probes are IP68. Junctions/distribution boxes should be IP67/IP69K. Use glands with strain relief.
What are typical pitfalls?
- Wet reference → renew filter, mount higher
- Wrong density → activate compensation/maintain density curve
- Waves/vibration → stilling well, increase damping
- EMC coupling → shielded routing, separate power/signal
Do you support selection & commissioning?
Yes. We size the range, select materials/cables, define mounting, provide calibration certificates and integrate the measuring point into PLC/SCADA/cloud.