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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 350 psi UL & CSA Approved SPDT 5A-125, 250, or 480VAC, ½A-125V DC or ¼A-250V DC
EA100S ** 1" Screwed or S.W. 800 psi @ 520ºF
EA100 EPS ** 1" Screwed 800 psi @ 520ºF
EA100G-150 High or Low Alarm, or fuel Cut-Out Cast Steel ASTM A216 Gr. WCB 1" FNPT/1" FSW 200 psi UL listed and CSA approved SPDT
UL Code 35
5 A, 125, 250, or 480 Vac
1/2 A, 125 Vdc; 1/4 amp 250 Vdc
Switch Max. Temperature: 400°F
EA100G-300 High or Low Alarm, or fuel Cut-Out Cast Steel ASTM A216 Gr. WCB 1" FNPT/1" FSW 500 psi
EA100G-600 High or Low Alarm, or fuel Cut-Out Cast Steel ASTM A216 Gr. WCB 1" FNPT/1" FSW 1000 psi
EA101D ** High or Low Alarm, Fuel Cut-Out & Pump Controls Cast Steel ASTM A216 Gr. WCB 1" Screwed 350WSP 1000 psi Series R100L (plug in) 5A-120 & 240V AC
EA101S ** 1" Screwed or S.W. 450WSP 1000 psi 1000WSP 1800 psi
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 650 psi (tank) UL & CSA Approved SPDT 5A-125, 250, or 480V AC ½A-125V DC or ¼A-250V DC
EA100SP ** 1" Screwed or S.W. 800 psi @ 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 !
 

Levalarm® GOLD Float-Type Switch

3 Models to suit your application needs:
  • EA100G-150: 200 PSI (13.8 Bar) MAWP
  • EA100G-300/EA 100G-300SW: 500 PSI (34.5 Bar) MAWP
  • EA100G-600/EA100G-600SW: 1000 PSI (69 Bar) MAWP
  • 3 Models to suit your application needs
  • 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

The new Levalarm GOLD switch represents a major step forward in reliability. It employs the same interlocking magnet operation used by Clark Clark-Reliance in its Jerguson Level Switches for over 28 years. Here’s how it works:

A stainless steel float is attached to the end of a rod with a stainless steel encapsulated magnet. The magnet travels vertically in the pressure tube. The primary magnet on the float rod inside the pressure tube drives the secondary magnet, which in turn drives the tertiary magnet. The tertiary magnet is mounted to the switch arm and activates the switch. The use of repelling magnetic fields create a positive interlocking switch that is vibration resistant.

A buoyed float will cause the reaction of the magnets to hold the switch open or closed, depending on which switch terminals are used. As liquid falls in the chamber, the float drops and directs the magnets to the opposite position which activates the switch in the opposite direction.

Agency Approvals UL 353 FM 7710
Connection Sizes: Model EA100-G-150: 1" FNPT
Model EA100G-300/EA100G-300SW: 1" FNPT / 1" FSW
Model EA100G-600/EA100G-600SW: 1" FNPT / 1" FSW
Pressure Rating:
(MAWP = Maximum Allowable
Working Pressure)
EA100G-150: 200 PSI (13.8 Bar) MAWP
EA100G-300/EA 100G-300SW: 500 PSI (34.5 Bar) MAWP
EA100G-600/EA100G-600SW: 1000 PSI (69 Bar) MAWP
Float Switch Rating: UL listed and CSA approved SPDT
UL Code 35
5 A, 125, 250, or 480 Vac
1/2 A, 125 Vdc; 1/4 amp 250 Vdc
Switch Max. Temperature: 400°F
Environment: Indoor or outdoor
 
 
The EA100D & EA100S have been replaced by the EA100G
 
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).

 

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.

See more information on the EA100DLB

 
The EA100D & EA100S have been replaced by the EA100G
 
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).

 

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

 
The EA100D & EA100S have been replaced by the EA100G
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