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Model RH/RHX    HIGH TEMP Bin Level Indicator


Lighting the way!


Universal level detection for powders and bulk solids where high process temperatures exist - low maintenance, high value and high reliability.


Model RH/RHX HIGH TEMP bin level indicator uses rotary paddle technology with stainless steel extension, mounting plate, air purge and seal allowing unit to operate with continuous process temperatures up to 750 degrees F (399 degrees C) and provides a unique combination of features.


  • SUPER BRIGHT LED’s locally indicate Normal / Alarm status
  • Rugged aluminum enclosure with powder coat finish (FDA Compliant)
  • Twist off cover
  • HIGH TEMP stainless steel extension
  • Air purge connection
  • Selectable High/Low fail-safe output on power failure
  • Four bearing shaft assembly increases reliability and life
  • Automatic motor shut-off
  • Internal bi-directional clutch protects motor
  • Various voltages
  • DPDT relay
  • Removable wiring terminals
  • Interchangeable with other brands accessories
  • Adjustable sensitivity (if needed)
  • Dual conduit entrances
  • You are protected - Golden Parachute Support



For More Information

Click here to download product line PDF’s.

  1. Model RH/RHX High Temp Sales Flyer
  2. Model RH/RHX High Temp Technical Information
  3. Model RH/RHX High Temp Installation, Operation and Maintenance Instructions


Model RH/RHX Rotary Paddle Accessories


Rotary paddle accessories are used for a variety of reasons;

  1. - Paddles are the extension of the rotary bin level indicator shaft into the material and this device contacts the material in the bin when present. The density and particle size relate directly to the paddle to be used, along with mounting criteria.
  2. - Couplings provide a method for connecting the rotary unit output shaft to the paddle when a fixed paddle is to be used.


The proper choice and use of a paddle and other type of accessory is important to the success of your installation.

Principal of Operation

For several decades rotary paddle technology has been used as a method for detecting the presence and absence of bulk solid materials. A robust synchronous motor drives a stainless steel output shaft at approximately 1 RPM.


In the Model RH/RHX HIGH TEMP rotary paddle bin level indicator the output shaft is attached to a stainless steel extension shaft and the paddle is attached to the end of this extension. The extension shaft is enclosed within a stainless steel cooling chamber extension that allows for the connection to an air line for air purge cooling. This assembly is finished with a stainless steel/graphite-alloy seal.


The paddle rotates freely in the absence of material within the bin. Material presence surrounding the paddle in the bin will impede its rotation and cause the state of the built-in relay contacts to change, indicating material presence. The built-in LED’s will change to indicate the status of the alarm condition.

Application and Use

High (full), low (empty) and intermediate (demand) level indication are common applications where high process temperatures up to 750° F (399° C) are common.


The Model RH/RHX HIGH TEMP units can be used to detect materials with density from 5lbs/ft³ (80kg/m³) for low and intermediate level control and from 10lbs/ft³ (160kg/m³) for high level.

Technical Data Summary

Housing Die-cast aluminum, FDA compliant powder coat, NEMA Type 4X, IP65
Process Temp Up to 750° F (399° C) with air purge; 500° F (260° C) without air purge
Ambient Temp -40° F to +158° F (-40° C to +70° C)

Low Level ≥ 5lbs/ft³

High Level ≥ 10lbs/ft³

Motor Voltage 24VAC, 115VAC, 230VAC, 12VDC or 24VDC
Output DPDT Relay, 8A @ 250VAC
Fail-Safe Selectable - High or Low
Process Connect Mounting Plate
Bearings Four (4) sealed bearings
Certifications Ordinary Location; CE mark; Hazardous Location

High Temp Models Available

  • 24VAC, 115VAC, 230VAC, 12VDC or 24VDC
  • Standard or Extended Insertion Lengths
  • Folding or Conventional Paddles
  • Ordinary or Hazardous Locations




Call To Order Now!


Ordering Information –

Sensor Final Assembly Part Number Structure

4 0 - 1 X X X - 1 X X

Shaft Coupling

1- None

2- Standard Coupling

3- Optional Coupling

Power Supply

1 - 115VAC

2 - 230VAC

3 - 24VAC

4 - 12VDC

5 - 24VDC


1- Ordinary Location

2- Hazardous Location

Process Connection

1 – Mounting Plate


2- High Temp

BlueLevel Technologies, Inc.   |   |   Phone: 330-523-5215   |   Fax: 330-523-5212

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