Nivotester FTC325

Summary

Product identification

• Product: Nivotester FTC325
• Type: Point level switch with intrinsically safe signal circuit for connection to capacitance sensors.
• Technology: Available in PFM (pulse-frequency modulation) and 3-WIRE versions.

Application

The Nivotester FTC325 is designed for:

• Point level detection in liquid tanks and bulk solids silos, including hazardous areas (Zone 0 or 20).
• Liquid detection in pipes for dry-running protection of pumps.
• Overfill prevention in tanks containing flammable or non-flammable water-polluting liquids.
• Two-point control (Δs with 3-WIRE) and point level detection.
• Applications with international explosion protection certificates and WHG (Water Resources Act) approval.

Operating Limits

• Ambient temperature range:
  • Single installation: –20 to +60 °C (–4 to 140 °F)
  • Side-by-side installation without lateral spacing: –20 to +50 °C (–4 to +122 °F)
  • Installation in protective housing: –20 to +40 °C (–4 to +104 °F)
• Storage temperature: –25 to +85 °C (–13 to 185 °F)
• Operating altitude: Up to 2 000 m (6 500 ft) above sea level.
• Humidity: 5 to 85 %

Feed water / Process medium

The device is suitable for:

• Liquids
• Bulk solids (dry and moist)
• Aqueous liquids and alcohols
• Solvents and fuels
• Sludge

Media characteristics to consider include conductivity and build-up tendency.

Product water / Output

• Output signal: Potential-free changeover contact for level alarm.
• Fault-signaling relay: Potential-free changeover contact for fault signaling.
• Switching delay: Adjustable from 0 to 45 s for delayed switching when the probe is covered or uncovered (opposite direction delay is 0.2 s).
• Relay contact switching capacity:
  • AC: Max. 250 V, Max. 2 A, Max. 500 VA (cos φ ≥ 0.7)
  • DC: Max. 40 V, Max. 2 A, Max. 80 W
• Operating life: At least 10⁵ switching operations with maximum contact load.
• Function indicators: LEDs for operation, level alarm, and fault.

Electrical

• Supply voltage:
  • AC version: 85 to 253 VAC, 50/60 Hz
  • Low voltage versions: 20 to 30 VAC / 20 to 60 VDC
• Power consumption:
  • AC: Max. 6.0 VA
  • DC: Max. 2.0 W (with Umin 20 V)
• Overvoltage category: II
• Protection class: II (double or reinforced insulation)
• Galvanic isolation: All input and output channels are galvanically isolated.
• Intrinsically safe signal circuit ([Ex ia]): For use of sensors in hazardous areas.
  • PFM: Max. 1000 m (3281 ft) cable length/resistance max. 25 Ω per wire.
  • 3-WIRE: Max. 1000 m (3281 ft) cable length/resistance max. 25 Ω per wire.

Mechanical / Hydraulic

• Housing material: Polycarbonate (PC)
• Dimensions: Specific dimensions are available via the Product Configurator on the Endress+Hauser website.
• Weight:
  • PFM: Approx. 250 g (8.81 oz)
  • 3-WIRE: Approx. 148 g (5.22 oz)
• Degree of protection: IP20 (device), IK06 (impact resistance).
• Mounting: Standard DIN rails (EN 60715 TH35-7.5/15). Compact housing for side-by-side installation.
• Terminals: Screw terminals.
  • PFM: 2 for sensor power, 3 for level relay, 2 for fault relay, 2 for power supply.
  • 3-WIRE: 3 for sensor power + signal, 4 for limit relays, 4 for power supply/fault relays.
  • Connection cross-section: Max. 1 x 2.5 mm² (14 AWG) or 2 x 1.5 mm² (16 AWG).

Certificates and Approvals

• CE mark
• RCM-Tick mark
• Ex approval (information available from sales center, specific documents required for hazardous area use).
• Type of protection (PFM): II(1)G [Ex ia Ga] IIC, II(1)D [Ex ia Da] IIIC.
• Overfill prevention (WHG) for FTC325 PFM.

Disclaimer

This summary is extracted from datasheet information and may not include all figures, footnotes, or revisions. Contractual data must match the official OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror