- 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
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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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- 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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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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 |
| 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 |
| 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 |
- 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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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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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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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 |
| 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 |
| 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 |
| 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 |
| 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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- 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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- 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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- 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 |
| Datasheet |
| User Manual |
Submersible Level Probes – Hydrostatic Level Measurement for Water, Wastewater & Processes
Submersible level probes determine level via the hydrostatic pressure at the measuring point: from p = ρ · g · h the liquid height is calculated. They are ideal for wells, shafts, basins, tanks and pits – from drinking water and wastewater to chemical and energy applications. Variants provide 4–20 mA, 0–10 V and digital HART, IO-Link or RS-485/Modbus RTU; optional ATEX/IECEx, drinking-water approvals and long-term stability.
ICS Schneider Messtechnik assists with selection & sizing (range, density, cable/material choice), installation accessories (probe weights, vent filters, cable holders, stilling pipes), calibration and—on request— IIoT integration into SCADA/cloud via edge gateways (MQTT/HTTPS).
FAQ on Submersible Level Probes
Answers on principle, accuracy, cable/materials, installation, venting, density/temperature compensation, Ex/hygiene and digitalization.
How does hydrostatic measurement with submersible probes work?
The probe measures the absolute or vented (gauge) pressure at depth. Level height is derived by h ≈ p / (ρ · g). Prerequisite: known/compensated medium density ρ.
What accuracy is typical?
Depending on model, ±0.1…0.5% FS. Consider the Total Error Band across temperature and the quality of venting (for vented cables).
Which outputs/interfaces are available?
| Interface | Property | Use |
|---|---|---|
| 4–20 mA | 2-wire, robust, long runs | Process/retrofit |
| 0–10 V | 3-wire, high local resolution | Panels/short distances |
| HART | Analog + parameterization/diagnostics | Installed base |
| IO-Link | Fast parameterization/events | Machinery/OEM |
| RS-485/Modbus | Multi-drop, long cables | Distributed/IIoT |
Which cable and housing materials are recommended?
| Component | Option | Suitability |
|---|---|---|
| Housing | 316L / Duplex | Water/wastewater, many media |
| Housing | Hastelloy® / Titanium | Corrosive media, seawater, chemicals |
| Cable | PU | Drinking/service water, flexible |
| Cable | FEP/PTFE | Hot/chemically resistant |
| Diaphragm | 316L / Hastelloy® | Standard / aggressive media |
What should I watch for with vented reference tubes?
- Keep the vent filter dry and clean; replace periodically.
- Avoid condensate (route upward, drip loops, desiccant capsule).
- If venting is difficult: consider an absolute-mode probe with barometric compensation.
How do I compensate density and temperature effects?
Either measure density or store it as a property; the edge/SCADA converts p→h dynamically. A temperature sensor near the probe improves compensation, especially for media with strong ρ(T) dependency.
What are best practices for installation?
- Mount in a calm zone (stilling/guide tube); keep distance from inlets/agitators.
- Use a probe weight and strain-relieved suspension; do not carry load on the cable.
- EMC-compliant routing; provide surge/lightning protection.
Are Ex or hygienic applications possible?
Yes. Versions with ATEX/IECEx and drinking-water approvals are available. For hygiene: smooth surfaces, suitable seals, CIP/SIP resistance and protective caps as required.
How do I convert level height to volume/percent?
Via strapping tables (height→volume) or tank-geometry formulas. For non-linear tanks, compute percent from volume, not height.
What polling/publish intervals make sense?
| Use Case | Interval | Note |
|---|---|---|
| Well/basin | 5–30 s | On-change (Δ≥0.5%) reduces traffic |
| Shaft/overflow | 1–5 s | Fast alarms/events |
| Storage tank | 10–60 s | Trend/reporting |
How do I protect the probe from sludge/build-up?
Use a slotted stilling/protection tube, keep distance from the bottom, plan periodic cleaning; for heavy fouling consider angled or flush-style designs.
What IP ratings and depths are typical?
Submersible probes are IP68; observe permissible immersion depth and cable tensile loads per datasheet. For very deep wells, relieve mechanically with a stainless-steel cable.
How often should I calibrate?
Recommendation: annually; for QA/safety loops semi-annually/quarterly or event-based (overload/service). ISO/DAkkS certificates available.
Can I integrate submersible probes into my IIoT?
Yes—via PLC or edge gateway (Analog/HART/Modbus/IO-Link → MQTT/HTTPS) for dashboards, alarms and historian. Security: TLS/VPN, certificates, roles/scopes, audit logs.
Typical error causes & remedies
- Drift/offset: wet/dirty vent → replace filter, keep dry.
- Fluctuating values: turbulence → stilling tube, increase averaging.
- Wrong percent: missing/wrong strapping → verify table/geometry.
- Overload/damage: range too small or water hammer → increase range, add snubber/protection.
Do you support selection & commissioning?
Yes—from media/material check, sizing (range/density), mounting accessories and calibration to commissioning with documentation and test reports.