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Clark Reliance Level Alarms and Level Controls

  • RELIABLE CONTROL OF ALARMS, FUEL CUT-OUTS, PUMPS
  • INSTALL ON BOILERS, TANKS, WATER COLUMNS FOR PRESSURES TO 1800 PSI
Click to openClark Reliance Levalarm Models: Descriptions & Functions (click to view)
Model Functions Material Connections Max Pressure Switch Rating
EA100D ** High or Low Alarm, or fuel Cut-Out Cast Steel ASTM A216 Gr. WCB 1" Screwed 350psi UL & CSA Approved SPDT 5A-125, 250, or 480VAC, ½A-125V DC or ¼A-250V DC
EA100S ** 1" Screwed or S.W. 800psi @ 520ºF
EA100 EPS ** 1" Screwed 800psi @ 520ºF
EA101D ** High or Low Alarm, Fuel Cut-Out & Pump Controls Cast Steel ASTM A216 Gr. WCB 1" Screwed 350WSP 1000psi Series R100L (plug in) 5A-120 & 240V AC
EA101S ** 1" Screwed or S.W. 450WSP 1000psi 1000WSP 1800psi
1" Socket Weld  
EA100DP ** Dual Fuel Cut-Out or Fuel Cut-Out & Low Alarm or Dual Fuel Cut-Out & Low Water Level Alarm Cast Steel ASTM A216 Gr. WCB 1" Screwed 350WSP 650psi (tank) UL & CSA Approved SPDT 5A-125, 250, or 480V AC ½A-125V DC or ¼A-250V DC
EA100SP ** 1" Screwed or S.W. 800psi @ 520ºF
EA15R ** Bronze ASTM B61 ¾" Screwed 450WSP Series R100L (plug in) 5A-120 & 240V AC
EA17/EA-18*** Retropak PC High or Low Alarm, Fuel Cut-Out & Pump Controls Carbon Steel ASTM A516 Flanged Cap 250 WSP
** Applications: Boilers & Tanks & Water Columns | *** Applications: Water Columns | We Stock Model EA100D and EA100S !
 
EA100D Single Function On Boilers Or Tanks / Max Pressure: 350 PSI

EA100DActuate Electric Warning Signals Or Fuel Cut-Out.  Pressures To 350 PSI At 520° F

When tank or boiler levels reach predetermined high or low levels, the Levalarm will actuate bells, horns or lights. EA100D models are also used for fuel cut-out control.  The EA100D can be purchased with or without the body (Model EA100DLB).

EA100D: Single Function On Boilers Or Tanks / Max Pressure: 350 PSI  We Stock the Model EA100D !

See more information on the EA100D

 

Clark Reliance Model EA100DLB

EA100DLBOperation: A stainless steel float swings at the end of a pivot rod.  The rod head carries an Alnico V magnet. The magnet attracts one leg of a U-shaped armature which is  attached to a micro-switch leaf actuator.  A buoyed float holds the switch open or closed, depending on terminals used.  As liquid levels fall, the float drops and directs the magnet to the opposite position.  A closed switch actuates alarms.  An open switch achieves fuel cut-out. Larger Image of EA-100D | See Full Size Levelarm Cut-a-way

See more information on the EA100DLB

Click to open Want To Convert Your EA100D Float Style Level Alarm Into A Probe Style? (Click for EA100DRPT details)

Reliance Retropak KitRetropak Cap Assembly for EA100 Levalarms®

Single and Dual Function Control for Alarms, Pumps & Fuel Cut-Outs
  • Model EA100DRPT Fits EA100 and EA100D

Installs on Boiler, Tanks, Water Columns - Pressures to 800 PSI

  • Designed to retrofit EA100D Models
  • Eliminates the float mechanism
  • Installs without disturbing any boiler piping
  • Higher reliability with conductivity probes
  • Less maintenance
Retrofit Kit Includes:
  1. New flange cover with Tprobe:
  2. Probe housing kit with ½”conduit connection
  3. Replacement flange gasket
  4. One 30 ft. length of 18 gage Teflon® insulated wire are supplied for the installation up to 15 ft. between probe and relay.
    Note: relay control sold separately
 
 
 
EA100S: Single Function On Boilers Or Tanks / Max Pressure: 800 PSI

EA100SActuate Electric Warning Signals Or Fuel Cut-Out.  Pressures To 800 PSI At 520° F

When tank or boiler levels reach predetermined high or low levels, the Levalarm will actuate bells, horns or lights. EA100S models are also used for fuel cut-out control.  The EA100S can be purchased with or without the body (Model EA100SLB).

EA100S: Single Function On Boilers Or Tanks / Max Pressure: 800 PSI  We Stock the Model EA100S !

See more information on the EA100S

 

Clark Reliance Model EA100SLB

EA100DLBOperation: A stainless steel float swings at the end of a pivot rod. The rod head carries an Alnico V magnet.  The magnet attracts one leg of a U-shaped armature which is  attached to a micro-switch leaf actuator.  A buoyed float holds the switch open or closed, depending on terminals used.  As liquid levels fall, the float drops and directs the magnet to the opposite position.  A closed switch actuates alarms.  An open switch achieves fuel cut-out.

See more information on the EA100SLB

Click to open Want To Convert Your EA100S Float Style Level Alarm Into A Probe Style? (Click for EA100SRPV details)

Reliance Retropak KitRetropak Cap Assembly for EA100 Levalarms®

Single and Dual Function Control for Alarms, Pumps & Fuel Cut-Outs
  • Model EA100SRPV Fits EA100S and EA100SW

Installs on Boiler, Tanks, Water Columns - Pressures to 800 PSI

  • Designed to retrofit EA100S Models
  • Eliminates the float mechanism
  • Installs without disturbing any boiler piping
  • Higher reliability with conductivity probes
  • Less maintenance
Retrofit Kit Includes:
  1. New flange cover with V probe:
  2. Probe housing kit with ½”conduit connection
  3. Replacement flange gasket
  4. One 30 ft. length of 18 gage Teflon® insulated wire are supplied for the installation up to 15 ft. between probe and relay.
    Note: relay control sold separately
 
Model EA100EPS: For Explosion Proof Applications
Clark Reliance Model EA100EPSThe Levalarm Model EA100EPS is equipped with a switch housing that meets UL requirements for Class 1, Group D, Division 1 service.  In design, materials, and performance, this model is similar to Model EA100S.  Explosion proof models are ideally suited for chemical and petroleum field applications.
 

 
EA100DP: Dual Function Float & Probes

EA100DPOperation is highly reliable and sensitive because the magnet counterbalances the float, allowing accurate use of the float's buoyancy.  Note that the magnet does not "slide", thereby eliminating any friction that could impede movement and accuracy.

For high temperature applications, a ventilated housing is available.  Also, when insurance or other regulations require two independent fuel cut-outs, two Levalarm's may be wired in series.

Conductivity ProbesActuate Dual Fuel Cut-Out, Fuel Cut-Out & Low Alarm, Or Dual Fuel Cut-Out & Low Alarm.  Pressure To 800 PSI At 520ºF

These Levalarm models incorporate two independent controls, operating on different principles, and contained in a common body.  They are usually installed when insurance or other regulations require two independent fuel cut-out devices - which may share a common chamber.

One cut-out switch is float actuated, a second switch consists of one or two probes which extend into the water chamber, the chamber serving as a ground connection.

Probe Operation:  When water drops below the probe end, a relay is de-energized and opens the fuel cut-out circuit and/or closes the low alarm circuit.   A second probe, shorter, can actuate an alarm when water approaches the fuel cut-out point.

Relay control units, in specified NEMA enclosures, can be mounted virtually any distance from the Levalarm.


 
 
 
Series EA101: Dual Functions On Boilers And Tanks

Model EA101Recommended Control For Power Plants And Processing Facilities.  Pressures To 1800 W.S.P

Series EA101 models provide reliable and instant response. Probes respond to the rise and fall of water at predetermined 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.

Operation One Probe/One Relay: High Alarm -Low Alarm - Fuel Cut-Out (Low Alarm & Fuel Cut-Out At Same Level). Two Probes/One Relay: On And Off Pump Control Within 3-Inch Level Variation. Two Probes/Two Relays: Dual Fuel Cut-Out (Low Alarm & Fuel Cut-Out On Different Levels).

 
 
 
Dual Functions For Float-Type Water Columns

EA15RFor fuel cut-out only or fuel cut-out and low alarm.  Pressures to 450psi

EA15R is a probe type Levalarm featuring a pair of probes in a bronze body. Factory set cut-out levels may range from 2-1/2" to 5-1/2" above the lower water gage valve center. Minimum mounting centers: 12". When ordering, specify valve centers, and relay control unit. Also locate fuel cut-out point distance above centerline of valve connection.


 
 
 
Clark Reliance Relays Improve Reliability, Offer Installation Ease and Economy
  • Clark Reliance Relays Each relay module is independently fuse protected.
  • Plug-in relays are removed by hand, no tools required
  • Relays supply low voltage (12 VAC) to Probes
  • Relays enhance sensitivity for extremely low water conductivity applications, to 1 Micro Mho
  • Relays improve switch contact reliability for low load applications such as computer interface, recorders
  • Relays (like the ECID23) use integral LED indicators to verify status.
  • Relays will retrofit existing system installations

Typical Relay, Single Level Service - Direct Mode Operation (Standard) When water level rises to Terminal 3 Probe, water completes circuit. Circuit signals Relay to change state of load contacts, activating Alarm or other equipment, while illuminating integral LED. Relay is energized until water drops below Probe to break circuit, turning off Alarm and LED.

Inverse Mode Operation (Optional) Upon powering Supply Terminals 1 and 2, Relay energizes (LED on). When water rises to Terminal 3 Probe, Probe signals Relay to de-energize (LED off). Relay remains de-energized until water drops below Probe. Even during momentary power failures, Relay remains in "safe" mode in Low Level applications. Specify inverse mode, when required.


 
Convert Your EA100D or EA100S Float Style Level Alarm Into A Probe Style

Reliance Retropak KitRetropak Cap Assembly for EA100 Levalarms®

The Clark Reliance Retropak PC are available for converting float-type water columns into versatile Probe Control Stations.

Retrofit Kit Includes:
  1. New flange cover with T or V probe*:
  2. Probe housing kit with ½”conduit connection
  3. Replacement flange gasket.
  4. One 30 ft. length of 18 gage Teflon® insulated wire are supplied for the installation up to 15 ft. between probe and relay.
    Note: relay control sold separately.

* T-probe for EA100D & V-probe for EA100S


Level Alarm Support Files / Links

Level Alarm Drawings (complete set) Level Alarm Drawings (complete set) (896 KB)

Level Alarm EA100S Drawing Level Alarm EA100S Drawing (267 KB)

Level Alarm EA101S Drawing Level Alarm EA101S Drawing (594 KB)

Level Alarm Model EA100D Drawing Level Alarm Model EA100D Drawing (75 KB)

Level Alarm Model EA101D Drawing Level Alarm Model EA101D Drawing (61 KB)

Level Alarm Retropak PC Level Alarm Retropak PC (221 KB)