Frequently Asked Questions

A level switch (like CP-LS or MF-LS) provides discrete on/off signals when liquid reaches a specific point. They're ideal for high/low alarms and pump control.

A level transmitter (like MF-LT) provides continuous analog output (4-20mA or 0-10V) representing the entire level range. This allows real-time monitoring and precise inventory management with SCADA/PLC systems.

Consider these factors:

• Media type: Capacitive (CP-LS) for viscous/sticky materials; Float switches (MF-LS) for clean liquids
• Measurement requirement: Point detection vs. continuous measurement
• Material compatibility: Stainless Steel, PVC, or TEFLON for chemical resistance
• Temperature/Pressure: Check specifications match your process conditions
• Output type: Relay contact, analog signal (4-20mA), or resistance output

Contact our application engineering team for personalized recommendations.

All LEVEX level sensors and transmitters come with a standard 12-month warranty covering manufacturing defects and workmanship. Warranty does not cover damage from improper installation, chemical incompatibility, or mechanical abuse. Contact us at levex@modmag.cc for warranty claims.

Yes, many LEVEX products are available with ATEX and IECEx certifications for hazardous locations (Zone 1 and Zone 2). Specify hazardous area requirements when ordering. Standard models are suitable for general industrial use (non-classified areas).

• CP-LS Series: 300mm to 2500mm
• MF-LS Series: 100mm to 4000mm
• MF-LT Series: 200mm to 4000mm (TEFLON limited to 2000mm)
• MF-TS Series: 200mm to 2000mm

Custom lengths may be available upon request. Contact our sales team for special requirements.

No, magnetic float switches (MF-LS, MF-LT, MF-TS) must be installed vertically for proper operation. The float needs to move freely up and down the probe. Angled installations will cause binding and false readings. For horizontal tanks, consider using capacitive switches (CP-LS) mounted on the side wall.

Standard process connection is NPT 2.5" for most models. Flange connections (3" or 4" ANSI/DIN) are also available as standard options. Custom connections can be provided for specific tank fittings. Always verify compatibility with your existing tank nozzle before ordering.

MF-LT transmitters use 2-wire loop-powered configuration:

• Connect (+) terminal to PLC analog input (+) and 24VDC power supply (+)
• Connect (-) terminal to PLC analog input (-) and power supply (-)
• Ensure 250Ω resistor is present in PLC input (most modern PLCs have built-in)
• Loop resistance should not exceed 500Ω total

Refer to installation manual for detailed wiring diagrams. Our technical support team can assist with complex installations.

False alarms in CP-LS sensors are usually caused by:

• Sensitivity too high: Adjust potentiometer to reduce sensitivity
• Buildup on probe: Clean probe surface; consider more frequent maintenance
• Electrical interference: Route sensor cable away from power cables; use shielded cable
• Grounding issues: Ensure proper earth ground connection
• Condensation: Verify ambient temperature rating is adequate

If problems persist after adjustment, contact technical support for diagnosis.

Float sticking can occur due to:

• Debris accumulation: Remove probe and clean float mechanism
• Media buildup: Use appropriate solvent to dissolve sticky residue
• Float damage: Inspect for cracks or leaks; replace if necessary
• Probe misalignment: Ensure probe is perfectly vertical

For persistent issues, return unit for factory inspection under warranty (if applicable).

Signal drift in MF-LT transmitters may be caused by:

• Temperature changes: Allow sensor to stabilize after temperature swings
• Float wear: Resistance ladder may have worn contacts; requires factory service
• Wiring resistance: Check cable connections for corrosion or loose terminals
• Power supply variation: Verify stable 24VDC supply with <1% ripple

Perform zero/span recalibration as described in manual. If drift continues, contact support for RMA.

The CP-LS can detect stable foam with sufficient density and dielectric constant. However, light aerated foam may not be reliably detected. For interface detection (oil/water separation), the CP-LS can detect the interface if there's sufficient difference in dielectric properties between the two liquids. Consult application engineering for interface applications.

The MF-LT has a typical response time of less than 500 milliseconds to register a 10% change in level. This is fast enough for most process control applications including pump control and batch filling. The actual response also depends on the float's buoyancy and liquid viscosity.

Yes, the MF-TS series is specifically designed for petroleum products including gasoline, diesel, jet fuel, and light heating oils. The stainless steel construction is compatible with most hydrocarbons. For extreme conditions (high aromatic content, biofuels, or additives), consult our chemical compatibility chart or contact technical support.

The MF-LS can accommodate up to 4 independent switch points on a single probe, each with its own NO/NC/Changeover output. This allows for multiple level alarms (high-high, high, low, low-low) on one sensor. Custom configurations with more switch points are possible upon request.