- nominal pressure: 0 ... 40 mbar up to 0 ... 20 bar
- accuracy: 0.35 % (opt. 0.25 %) FSO
- pressure port G 1 1/2" for pasty and polluted media
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- nominal pressure: 0 ... 100 mbar up to 0 ... 40 bar
- accuracy: 0.35 % (opt. 0.25% / 0.1 %) FSO
- small thermal effect
- excellent long term stability
- pressure port G 3/4" flush
| Datasheet |
- nominal pressure: 0 ... 400 mbar up to 0 ... 40 bar
- accuracy: 0.1 % FSO
- thermal error in compensated range -20 … 80 °C: 0.2 % FSO TC 0.02 % FSO / 10 K
- turn-down 1:10
- communication interface for adjusting of offset, span and damping
| Datasheet |
- nominal pressure: 0 ... 400 mbar up to 0 ... 60 bar
- accuracy: 0.5 % FSO
- pressure port G 3/4" flush
| Datasheet |
- Microwave level switch for media with more than 20% water content
- Insensitive to foam and build-up
- Hygienic installation according to EHEDG standards
- All parts in contact with the product are FDA-compliant
- Electronics fully encapsulated
- Vibration-resistant
- Compact design
- LED status indicator
| Datasheet |
- Microwave level switch for media with >20% water content
- Not influenced by foam or adhesions
- Hygienic installation in accordance with EHEDG
- Wetted parts compatible with FDA requirements
- Vibration resistant
- LED indicator
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SITRANS LVL100 is a compact vibrating level switch for liquid and slurry applications such as overflow, high, and low level detection. Also ideal for pump protection, safety backup and confined spaces.
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- Testfunktion einschließlich Remoteoptionen
- Fehlerüberwachung auf Korrosion, Ausfall der Schwingung oder Leitungsbruch zum Piezoantrieb
- Kompakte Bauweise
- Geringe Eintauchtiefe ab 40 mm (1.57")
- Optionen für extreme Drücke und Temperaturen
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- Ease of setup with no calibration and rotatable enclosure
- Suitable for low bulk density materials starting at 30 g/l (1.9 lb/ft³)
- Adjustable sensitivity for varied applications
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- High resistance to mechanical forces
- Strong vibration resistance to high bulk material loads
- Rotatable enclosure
- Suitable for low density material: standard version, 20 g/l (1.3 lb/ft³); liquid/solid interface version, 50 g/l (3 lb/ft³), and low density option min. 5 g/l (0.3 lb/ft³)
- Customer desired extensions up to 20 000 mm (787”)
- Optional detection of solids within liquid
- Durable short fork option with 165 mm (6.5 inch) insertion length
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SITRANS LPS200 is a rotary paddle switch for point level detection in bulk solids. Ideal for point level or safety backup applications with SIL 2 and motor failsafe detection.
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Screw-in Probes – hydrostatic level measurement via threaded & hygienic connections
Screw-in probes are pressure-based level sensors mounted directly into the tank wall or a side/bottom nozzle via threaded or hygienic connections. They measure the liquid’s hydrostatic pressure and output the corresponding level—ideal for tanks/vessels, CIP/process skids and utility systems.
Options (model-dependent): flush/flush-membrane for viscous/sticky media, housings in 316L/Hastelloy®/titanium, diaphragms ceramic or metal, seals EPDM/FKM/PTFE/FFKM, process connections G/NPT, clamp/Varivent, flange. Features include ATEX/IECEx, SIL, hygienic design, high-temperature options, and outputs 4–20 mA/HART, 0–10 V, Modbus/RS-485, IO-Link.
ICS Schneider Messtechnik supports principle selection, mounting location, density/temperature compensation, calibration and integration into PLC/SCADA/IIoT.
FAQ on Screw-in Probes
Answers on operating principle, threaded/hygienic connections, seals, accuracy, compensation, installation, cleaning, ATEX/SIL and best practices.
How does level measurement with screw-in probes work?
The probe senses the hydrostatic pressure at the mounting point. With the liquid density (ρ) the level is calculated via h = p/(ρ·g). For side mounting, the pressure equals the liquid head above the sensing point.
Which process connections are available?
| Type | Examples | Use case |
|---|---|---|
| Threaded | G 1/2, G 1, 1/2" NPT | General plant engineering |
| Hygienic | Clamp, Varivent, dairy | Food & beverage, pharma |
| Flange | PN/ANSI | Higher p/T, large nozzles |
Flush diaphragm or recessed port?
Flush avoids dead spaces and buildup (viscous/pasty media). Recessed ports are fine for clean, low-viscosity media and are often more economical.
What accuracy can I expect?
Typically ±0.1…0.25 % FS. Practical accuracy depends on density/temperature drift, mounting elevation, hydraulic calmness and zero setting.
How do I compensate density and temperature changes?
Option 1: set a fixed density in the transmitter/control system. Option 2: add temperature measurement and correct density via ρ(T). For strongly varying media consider radar/TDR instead.
How do I size the measuring range?
Maximum liquid head above the sensor × density → required pressure span (mH₂O or bar). Plan a 10–20 % margin.
Where is the optimal mounting point?
Low on the tank (near the bottom) or in a calm side tapping. Keep distance from inlets/agitators; ensure venting and drainability.
How do I seal correctly?
With G threads use a flat gasket/O-ring or sealing cone; with NPT (tapered) use proper paste/PTFE tape. For hygienic couplings use FDA/EHEDG-compliant gaskets.
Which materials and seals make sense?
| Material | Property | Typical use |
|---|---|---|
| 316L/1.4404 | Corrosion-resistant, hygienic | Water, food |
| Hastelloy® | Excellent chemical resistance | Chemical/process |
| Titanium | Chloride/seawater resistant | Offshore/saline media |
| EPDM/FKM/PTFE/FFKM | Broad media/temp capability | Selected per medium/T |
How do I avoid errors from foam, vibration or pulsation?
Use a calmed tapping or restrictor/capillary, enable damping in the transmitter, vent the impulse volume, provide vibration decoupling.
Can the probe output level/volume directly?
Yes. Many transmitters convert bar → mH₂O and—using a strapping table—output liters/m³; optional display, limits and totalizers.
What electrical interfaces are available?
4–20 mA/HART (2-wire), 0/10 V, Modbus/RS-485, IO-Link. Diagnostics: sensor status, overload, temperature, and optionally an event log.
How are parameterization and calibration done?
Via keys/display, DD/DTM/software or IO-Link. Set zero at atmosphere, span via reference column or defined level; configure density/T in the device.
Hygienic design—what matters?
Flush diaphragm, polished surfaces, dead-space-free couplings (clamp/Varivent), FDA/EU 1935/2004 seals, CIP/SIP resistance, and material certificates.
Are ATEX/IECEx & SIL options available?
Yes—many models offer Ex i/Ex d and SIL2/3. In hazardous areas use suitable barriers/isolators and observe device categories.
How do I handle tank vacuum or overpressure?
Size the range to include any static tank pressure (positive/negative). For vacuum service use an absolute or adequately vacuum-rated sensor.
What temperature/pressure limits apply?
Depending on design up to >100 °C and PN16/PN40+. Choose diaphragm and gasket materials to suit medium/temperature; use a neck extension if needed.
Maintenance & cleaning—what’s sensible?
Periodically check tightness, diaphragm surface and cables/connectors. Use CIP/SIP-compatible detergents; avoid hard tools on the diaphragm.
Typical pitfalls & fixes
- Wrong density configured → correct density/T or choose an alternative principle
- Air pocket at diaphragm → change orientation, vent properly
- Dead space/buildup → use flush diaphragm, hygienic fitting
- EMC interference → shielded cabling, bonding, separate power/signal
Do you support selection & commissioning?
Yes. We size the range/connection, define compensation, provide calibration certificates and integrate the measuring point into PLC/SCADA/IIoT with full documentation.