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Designing and manufacturing boiler level control systems since 1884, Clark-Reliance has become the most recognized and trusted name in  boiler-trim controls and operation. That position has been accomplished by the continued commitment to excellence in quality product  performance and customer service These values are core competencies at Clark-Reliance.

Simpliport® 180 Bi-Color Ported Water Gage System

Our Wide Angle Optics Illuminate Boiler Water Level at Any Angle, Any Distance Wherever you may be standing within 180° of the Simpliport Wide Angle Hood, you can clearly see the bright red or green indication of steam and water level.

Eye-Hye® SmartLevel™ Remote Water Level Indication System

THE WORLD’S SMARTEST BOILER WATER LEVEL INDICATION SYSTEM

INTELLIGENCE THAT IMPROVES STEAM EFFICIENCY

The all new Eye-Hye® SmartLevel™ Boiler Indication System adds patented technology to intelligently monitor the condition of its probes which sense water level in the boiler’s steam drum. When the probes require cleaning to remove residue and mineral build-up to maintain their accuracy, the system’s smart technology unambiguously notifies the control room or other remote locations that a probe column blowdown (cleaning) is necessary. If the blue light on the indicator is illuminated, a blowdown is needed.


  • Patented technology.
  • Self-diagnostic sensor technology.
  • Adapts to your communication systems.
  • Optimum quality steam for heat rate efficiency.
  • Designed for global applications


The system’s intelligence can distinguish “dirty” probes from probes that need to be replaced. Also, the Eye-Hye SmartLevel system eliminates the need for frequent blowdowns. Now, blowdowns can be performed when the blue indicator is illuminated (the probes need cleaning) or for scheduled cleaning of the connecting piping.

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  • Operator exposure to hazardous areas is minimized…unnecessary “nuisance” repair trips are eliminated. 
  • Longer probe and valve life… blowdowns are performed only when necessary, reducing wear. 
  • Pinpoints the failure of any module or peripheral in the system to simplify repair.



Prismatic Water Gages, Flat Glass Water Gages & DuraStar® Illumination

LEVALARMS® LOW WATER CUT-OUT AND LEVEL SWITCH APPLICATIONS

Probe-Type Level Switches

Levalarm® GOLD Float-Type Switch

Probe-Type Level Switches

Retropak Assemblies

Levalarm® GOLD Float-Type Switch

Probe-Type Level Switches

Levalarm® GOLD Float-Type Switch

Levalarm® GOLD Float-Type Switch

Levalarm® GOLD Float-Type Switch

Series EA101

EA100DRPT & EA100SRPV

Levalarm® GOLD Float-Type Switch

For Pressures up to 1800 PSI

Series EA101 models provide reliable and instant response. Probes respond to the rise and fall of water at pre- determined points, to actuate a variety of controls. Each Levalarm monitors up to 3-inch level variation. Multiple units, in series, extend the monitoring range. Use almost anywhere on water applications.

EA100DRPT & EA100SRPV

EA100DRPT & EA100SRPV

EA100DRPT & EA100SRPV

Convert Old EA100 Float-Design Units to Reliable Probe Operation


  • For Pressures up to 800 psi (55 Bar)
  • Eliminates float mechanism
  • Installs with no modification to boiler piping

Levalarm Gold

EA100DRPT & EA100SRPV

EA100DRPT & EA100SRPV

For Pressures up to 1000 psi (69 Bar)

  • Zero effect from heat, vibration or loss of electrical power
  • Positive interlocking magnet design – proven over 30 years of use
  • Drop-in design requires no adjustments to commission

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