RPM Series Resistive Chain Level Sensor

APG Resistive Chain Level Sensor, RPM Series

Features & Benefits


  • Intrinsically Safe or Explosion Proof Wiring
  • Rugged & Highly Reliable
  • Anti-stick Float Design
  • Continuous Level Indication


  • Resistive Chain or Loop Powered 4-20 mA Output
  • Manufactured Specifically to Meet User Specifications
  • Designed for Use Across Many Industries
  • Large Float Works Well in Dirty Environments
The RPM Level Sensor is designed for use in the chemical, oil, shipping, food processing, waste treatment, and many other industries. Each RPM is manufactured to the users specifications making it fit to work precisely according to the application requirements.

  • Continuous level indication
  • Rugged and highly reliable
  • Anti-stick float design
  • Resistive chain or loop powered 4-20 mA output
  • Hazardous location approvals - Explosion proof/Intrinsically safe
The above description encapsulates the entire product series. Specifications for individual configurations may vary depending on the selection chosen.
APG Level Probe Sensor, 84", Polyurethane Float, 4-20mA, Strain Relief w/Plug, 2"NPT
  • RPM: Explosion Proof Continuous Float Level Transmitter (Resistive)
  • 084: Probe Length: 84”
  • A: APG Label
  • F: Float
  • IS: 4-20 mA with IS and EX approval (Class 1, Div. 1)
  • 011: Strain Relief with Plug
  • 2: 1/2” resolution, top deadband (S1) - 8 inches, bottom deadband (S2) - 5 inches
  • 4T2: 2" NPT plug mounted outside of tank 316L SS
*** Crating Fees May Apply **

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Agency Approvals

  • ATEX ntrinsically Safe, Ex II 1G Ex ia IIB T3 Ga
  • CSA Explosion Proof, Class I, Zone 1, Ex d, IIB T3 and Class I, Zone 1, AEx d, IIB T3
  • CSA Intrinsically Safe, Class I, Division 1 and 2; Groups C & D

Environmental Protection

  • IP65

Maximum System Pressure

  • psi: 72.52 (kPa: 500, bar: 5)


  • High: 7 mm (0.25")
  • Standard: 13 mm (0.5")

Stem Length

  • 48" to 240" (122 cm to 640 cm)

Cable Entry

  • 3/4" NPT


  • 20-4 mA
  • 4-20 mA


  • Flange Mount
  • Pluggable Screw Elements

Enclosure/Body Material

  • Aluminum

Stem Material

  • 316L Stainless Steel

Materials of Construction

  • Float Material: 316L Stainless Steel
  • Float Material: Polyurethane

Sensor/Probe Style

  • Float

Float Stop for RPM Float Switch

Float Stop for RPM Float Switch

APG Float Stop, for RPM Float Switch, Collar, 2-Screws

RPM 8" Polyurethane Float

RPM 8" Polyurethane Float

APG RPM 8" Polyurethane Float, 8"polyurethane float