- 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
 Datasheet |
- 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
| Datasheet |
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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 Level Probes – Hydrostatic Level via Process Connection
Screw-in level probes measure level through the hydrostatic pressure at the vessel wall or at a stilling/standpipe, using standard process connections such as G ¼ / G ½, NPT, or hygienic fittings (Tri-Clamp/Varivent®). They are ideal for tanks, vessels and pipes where a fixed, sealed installation is preferred over submersible probes. Outputs include 4–20 mA, 0–10 V, and digital IO-Link, RS-485/Modbus RTU or HART; options: ATEX/IECEx, IP67/IP69K, hygienic design, high-temperature versions and corrosion-resistant wetted parts.
ICS Schneider Messtechnik supports selection & sizing (range/density), process connection & sealing, accessories (snubbers, siphons, diaphragm seals), calibration and IIoT integration into SCADA/cloud via edge gateways (MQTT/HTTPS).
FAQ on Screw-in Level Probes
Answers on installation, accuracy, materials, density/temperature compensation, hygienic/Ex options and digital connectivity.
How do screw-in level probes measure level?
They measure hydrostatic pressure at a defined tapping point (vessel wall, standpipe). Level is derived as h ≈ p / (ρ·g). For non-vented or closed tanks, combine with differential pressure or compensate headspace pressure.
When should I choose screw-in probes instead of submersible probes?
When a fixed, cleanable, sealed connection is required, when cable immersion is undesirable, or in hygienic and high-temperature applications with appropriate fittings and siphons/coolers.
Which outputs/interfaces are available?
| Interface | Benefit | Use Case |
|---|---|---|
| 4–20 mA | Robust, 2-wire, long runs | Process/retrofit |
| 0–10 V | High local resolution | Short wiring, panels |
| IO-Link | Fast setup, diagnostics | Machinery/OEM |
| RS-485/Modbus | Multi-drop, long cables | Distributed/IIoT |
| HART | Analog + digital access | Installed base |
What process connections and seals are typical?
| Connection | Standard | Notes |
|---|---|---|
| G ¼ / G ½ | ISO 228 | Industrial standard, use flat/gasket seals |
| ¼" / ½" NPT | ASME | Tapered thread, use compatible sealant |
| Tri-Clamp / Varivent® | Hygienic | With diaphragm seal for food/pharma |
| Flange | EN/ASME | For higher pressures/viscous media |
Which wetted materials and membranes suit my medium?
Stainless steel 316L for water and many chemicals; Hastelloy®, Monel®, Tantalum for aggressive media; elastomers/seals per medium/temperature (FKM, EPDM, PTFE, FFKM). For sticky/hot media use flush diaphragm or diaphragm seals.
How do I handle density and temperature effects?
Store density as a parameter or measure it; convert p→h dynamically in the PLC/edge. Add a temperature input for better compensation where ρ(T) varies.
What mounting tips improve stability and accuracy?
- Place tapping in a calm zone (use a stilling/standpipe if needed).
- Use snubbers/dampers to protect against pulsation.
- For steam/hot media: siphon/cooling element, mind orientation and fill.
- Keep impulse path short and free of trapped gas/liquid depending on application.
Are hygienic or Ex versions available?
Yes—EHEDG/IP69K-capable hygienic versions and ATEX/IECEx for hazardous areas. Use approved process connections and seals.
How often should I sample/publish level values?
| Application | Interval | Hint |
|---|---|---|
| Storage tank (calm) | 10–60 s | On-change (Δ≥0.5%) reduces traffic |
| Process tank | 2–10 s | Use hysteresis/filters |
| Overflow monitoring | 1–5 s | Fast alarms/events |
Which IP ratings and temperatures are typical?
Commonly IP65–IP69K housings; medium temperature per data sheet. For high temperatures use siphons/coolers or remote diaphragm seals.
Can screw-in probes be integrated into IIoT?
Yes—via PLC or edge gateway (Analog/HART/Modbus/IO-Link → MQTT/HTTPS) for dashboards, alarms and historian. Secure with TLS/VPN, device certificates, roles/scopes and audit logs.
Common issues & remedies
- Oscillation/noise: add snubber, increase filter time, use stilling tube.
- Offset/drift: temperature or trapped gas → bleed/vent, verify compensation.
- Clogging: use flush diaphragm or diaphragm seal; plan cleaning.
- Overrange: choose larger span or add overpressure protection.
Do you provide selection and commissioning support?
Yes—media/material check, sizing, process connection selection, accessories, calibration and commissioning with documentation/test reports.