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Model 1512e pH or ORP and Conductivity Controller

1268960 1512e pH or ORP and Conductivity Controller (with ISO)


ORP or pH and Conductivity Controller

The Model 1512e uses the latest in microprocessor capability, giving the user a high level of application flexibility.  The user in the field can configure this controller to operate as a pH and conductivity or as an ORP and conductivity controller.  A large illuminated graphics screen, multiple inputs, and very easy setup characterize this new technology.  The Model 1512e is ETL approved.

PART NUMBER 1268960 SHOWN  Cooling Tower Water Treatment Controller, Including Flow Switch Plumbing, pH Sensor And Conductivity Sensor On A Mounting Plate

1512e MANUAL 



  • Removable power cord and receptacles for simple conduit installations.
  • Scheduled feed, which can use three relays for biocides or other chemicals.
  • Two (2) water meter inputs, two (2) drum switch inputs, conductivity input, pH or ORP input, flow switch input, two 4-20 mA outputs, and remote conductivity and pH/ORP input via 4-20 mA, and seven relay outputs  are all standard features.
  • Designed with a single circuit board for better reliability and lower cost.
  • Large open shallow enclosure for easy wiring.
  • Ball valve delay feature allows accurate control of motorized ball valves.
  • Heavy-duty stainless steel domed numeric keypad and illuminated graphical display allow for quick and easy programming.  Steel domed switches improve the tactile sensing and life expectancy of the keypad.
  • LED indicators for power, flow, alarm, and relay status.




  • Easy to program with the Lakewood plain English, intuitive, and user friendly menu interface.
  • Single circuit board design improves reliability.
  • No add-on options.  Two 4-20 mA outputs and feed schedule clock features are standard.




Conductivity range 50-10,000 mS Timers Max. blowdown time exceeded
Conductivity sensor 2 electrode   and relay run time exceeded
Conductivity Resolution ± 10 µS (conductivity Output Signal Two 4 – 20 mA, isolated or
  ±10 mS(conductivity > 5000 mS)   non-isolated optionally powered
pH range 2-12 pH   output for conductivity and pH/ORP
ORP range -1000 to +1000 mV Output relays 7, 6 selectable use, 1 blowdown
Resolution ± .10 pH or 1 mV Relay ratings 3A each, 12A total
Sensor Types Solution ground, Signal differential, or Single ended Input Signal Two 4-20 mA, non-isolated  internally powered input for conductivity and pH/ORP
Temperature comp. Automatic Power 120 VAC 50/60 Hz
Accuracy & repeatability ± 1.0% Ambient 32° – 120°F (0 – 49°C)
Deadband/Setpoint Programmable Enclosure  NEMA 4X, ETL
Auto/Manual outputs Menu selectable  
Keypad 16 tactile push-buttons
Display illuminated 128×64 pixel LCD
Sensors/Plumb Cooling Tower
Drum Switch Inputs 2 digital contact inputs Max Pressure 140 psi  (9.65 bar)@ 100 °F
Water meter inputs (2) Contact head, paddle Max Temp 140°F (60°C)
  wheel or turbine Min flow 1 gpm (3.785 Lpm)



Ordering Options

Controller Spare part Options


1269290          Kit, Isolation, with enclosure for model 1512e pH or ORP.  (Required)


Cooling Tower Options

1268640 pH or ORP and Conductivity combo controllers  1240473_ORP W_15FT CABLE_060621  1240472_pH W_15FT CABLE_060621  1167158_2 el cond sensor w20ft cable_060417


 Cooling tower FS Plumbing


Cooling Tower ORP Sensor


Cooling Tower pH Sensor1167158

Cooling Tower Cond Sensor









1167158            Sensor, Conductivity 2 elec w/20 ft Cable

1169207            Sensor, Conductivity, 2 elec 4ft body

1240472            Sensor, pH 1520e, 2350e, 2412e w/15 ft of cable

1240473            Sensor, ORP 1530e, 2330e, 2430e w/15 ft of cable

1268640            Plumbing, 1512e/2412e/2430e/2812e/2830e

1269290            Kit, Isolation with Enclosure


 1166418            O-Ring, for sensor and/or flow sight, set of 10

1169740            Red Ring replacement Kit set of two

1107004            Reed Switch w/20 ft of cable

1167266            Flow Sight set of five

1167234            Flow Float set of five

1268640            Plumbing, 1512e/2412e/2430e/2812e/2830e