Level Sensors
Explosion Proof Flexible Stem Magnetostrictive Level Sensors - Image 2
Explosion Proof Flexible Stem Magnetostrictive Level Sensors - Image 3
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Explosion Proof Flexible Stem Magnetostrictive Level Sensors - Image 5
Level Sensors

Explosion Proof Flexible Stem Magnetostrictive Level Sensors

MPXI-F

Explosion Proof Installation For Your Tallest Tanks

The MPXI-F Explosion-Proof Flexible Magnetostrictive Level Sensor is designed for hazardous locations and tall tank installations. Featuring a proprietary PVDF or 316L stainless steel flexible stem, it enables crane-free installation in tanks up to 50 feet tall. With CSA, ATEX, and IECEx certifications, this sensor ensures safe and reliable operation in oil & gas, petrochemical, and industrial applications. Choose from Modbus RTU or loop-powered 4-20mA outputs for seamless integration with existing systems. Optional temperature sensors and a high-level switch provide added protection and monitoring.

  • Explosion-proof design: For hazardous locations
  • Flexible Stem Options: Flexible PVDF or 316L SS stem for easy installation
  • Multiple Output Options: Modbus RTU or 4-20mA output options
  • Real-Time Monitoring: Up to seven temperature sensors for real-time monitoring
  • High-level switch option: For extra safety
  • Protection Ratings: IP66 & NEMA 4X protection ratings

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MPXI-F
Install Guide

MPXI-F
IECEx Certificate

Modbus
Software Download
  • Resolution:
    • 4-20 mA: 14 bit DAC (1 mm); Modbus: 0.04 in. (1 mm)
  • Distance Accuracy:
    • 4-20 mA: Greater of ±0.05% of FS or 1 mm
    • Modbus: ±0.04 in. (±1 mm)
  • Temperature Accuracy:
    • Digital Temp Sensor: ±1°C
    • API 18.2 Temp Sensors:
      • ±0.25°C over -40° – 85°C
      • ±0.13°C over +20° – 70°C
  • Operating Temperature: -40º – 185ºF (-40º – 85ºC)
  • NEMA 4X, IP66
  • Supply Voltage: 12-24 VDC (Modbus), 24 VDC (4-20 mA)
  • Current draw:
    • 4-20mA, Single / Dual float: 22 / 44 mA (max)
    • Modbus (single or dual float): 15 mA (typ.)
  • Reverse polarity protection: Yes
  • CE compliant to EN 61326
  • RS-485: Optional RST-6001 USB to RS-485 converter
  • 4-20 mA: Factory set or RST-4100 programming module
  • Output:
    • Single or dual loop-powered 4-20 mA
    • Modbus RTU (RS-485), optional temperature sensors
  • Housing: Cast aluminium, epoxy coated
  • Stem: 7/8” Ø Flexible Tubing with Braid, 316L SS
  • Stem Length: 4 – 32 ft. (1.22 – 9.75 m)
  • NEMA 4X, IP66
  • cCSAus Certificate CSA19CA70219727:
    • Rated 12-24 VDC, Um 250 V, 4-20 mA, or 80 mA
    • Class I, Division 1, Groups C, D T4; IP66
    • Class I, Zone 0/1
    • AEx ia/db IIB T4 Ga/Gb
    • Ex ia/db IIB T4
    • a/Gb, IP66
    • Ta = -40º to 85ºC
  • ATEX Certificate Sira 19ATEX2072X:
    • II 1/2G
    • Ex ia/db IIB T4 Ga/Gb
    • Ta = -40º to 85ºC
  • IECEx Certificate IECEx SIR 19.0026X:
    • Ex ia/db IIB T4 Ga/Gb
    • Ta = -40º to 85ºC
What is the MPXI-F level sensor used for?

The MPXI-F is designed for level measurement in hazardous locations, especially in tall tanks up to 50 feet. It is ideal for applications in oil & gas storage, petrochemical processing, industrial wastewater, pulp & paper, and biotech & chemical facilities.

The MPXI-F is CSA, ATEX, and IECEx certified for hazardous locations, meeting strict safety standards for Class I Division 1 environments.

Unlike rigid sensors, the MPXI-F features a PVDF or 316L stainless steel flexible stem, allowing for crane-free installation in tall tanks, reducing costs and complexity.

Yes, the MPXI-F offers an option for up to seven temperature sensors along the probe, providing real-time temperature monitoring within the tank.

Yes, with Modbus RTU or 4-20mA outputs, the MPXI-F easily integrates with SCADA, PLC, and other industrial monitoring systems.

MOUNT

No Mount, NPT
OUTPUT

4-20 mA, Modbus
PROBE LENGTH

4' – 32'
ENCLOSURE PROTECTION

IP66, NEMA 4X
CERTIFICATION

ATEX, CSA – General, IECEx
INDUSTRY

Chemical, Food & Beverage, Industrial Automation, Oil & Gas, Water & Wastewater

WARRANTY

APG warrants its products to be free from defects in material and workmanship under normal use and service of the product for 24 months from the date of shipment from APG, unless otherwise specified by APG in writing. Read our full warranty policy HERE.

RETURNS

Returns and allowances must be authorized by APG in advance, which authorization may be granted or withheld by APG in APG’s sole and absolute discretion. Read our full return policy HERE.

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