Level Transmitter
Explosion Proof Resistive Level Probe - Image 2
Explosion Proof Resistive Level Probe - Image 3
Level Transmitter

Explosion Proof Resistive Level Probe

RPX

Reliable Measurements in Hazardous Environments

The RPX Explosion Proof Resistive Level Transmitter with a 1/2″ stem is designed for small tanks up to 8 ft. in height. Its durable, chemically compatible float and simple float-based operation (“float-goes-up, float-goes-down”) ensure reliable, low-maintenance performance.

Ideal for hazardous locations (Class I, Div 1), mud tanks, and wastewater systems, the RPX excels in measuring thick, viscous, or sludgy fluids across industries like chemical, oil, shipping, food processing, and waste treatment.

With continuous level indication, resistive chain or loop-powered 4-20 mA output, and intrinsically safe, explosion-proof, and non-incendive approvals, the RPX delivers accurate, dependable measurements in demanding environments.

  • Customizable: Customizable stem length, float size, and specific gravity
  • Built to Last: High chemical compatibility and durability
  • Versatile Output: Available with 4-20 mA or resistive output
  • 1/2" Stem: 1/2" stem for small tank applications
  • Certified for Safety: Explosion-proof, Intrinsically safe, and Non-incendive

ⓘ

RP Datasheet

RP User Manual
  • Resolution: 0.25 in. (6 mm)
  • Accuracy: ±0.12 in. (±3 mm)
  • Maximum Pressure: 72.5 PSI (5 bar)
  • Enclosure Protection: NEMA 4 & 7, IP65
  • Typical Current: (Resistive Output)
    • I = Supply VDC / (45Ω * Probe Length in inches)
  • Output: 4-20 mA; Resistive
  • Internet: via RST-5003, 4-20 mA only
  • Housing: Aluminum Die Cast
  • Stem Length: 96 in. (2440 mm) maximum
  • Cable Entry: 3/4 in. NPT
  • Class I, Division 1, Groups C & D T3 (Ta 40°C)
    • Explosion Proof
  • Ex d, IIB T3
    • Class I, Zone 1, AEx d, IIB T3 (Ta 40°C)
      • Explosion Proof
  • Class I, Division 2, Groups C & D T3 (Ta 85°C)
  • Class I, Division 2, Groups C & D T3 (Ta 85°C)
    • Non-incendive
  • Class I, Division 1, Groups C & D T3 (Ta 85°C)
    • Intrinsically Safe
  • Non-hazardous Use
What is the RPX Explosion Proof Resistive Level Transmitter used for?

The RPX level transmitter is designed for small tanks up to 8 ft. in height, providing reliable liquid level measurement in hazardous locations, mud tanks, wastewater systems, and other applications with thick, viscous, or sludgy fluids.

Yes, the RPX level probe can be customized in terms of stem length, float size, and specific gravity to fit your exact application requirements.

The RPX transmitter is designed for simple and reliable float-based operation. While initial setup may require calibration to match specific tank levels, ongoing recalibration is generally minimal.

Yes, the RPX transmitter is specifically designed to handle thick, viscous, and sludgy fluids, making it ideal for wastewater treatment, sewage, and mixed effluent applications.

Installation is straightforward, with mounting options tailored to your tank setup. Maintenance is minimal due to its simple float-based design, but periodic inspections are recommended to ensure optimal performance.

OUTPUT

4-20 mA
MOUNT

Flange, No Mount, NPT, Tri Clamp
CERTIFICATION

CSA – General, Explosion Proof, Intrinsically Safe
PROBE LENGTH

1' – 8'
ENCLOSURE PROTECTION

IP65, NEMA 4, NEMA 7
INDUSTRY

Chemical, 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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