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All Categories > Industrial Pumps & Meters > LMI Metering Pumps > LMI Liquitron™ DR5000 Series ORP Controllers  
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LMI Liquitron™ DR5000 Series ORP Controllers

  • Cooling Water
  • Waste Treatment
  • Surface Finishing
  • Chlorination
  • De-Chlorination
  • Food Processing
The DR5000 is a dual-channel ORP (redox) Controller providing either relay or proportional pulse outputs to drive chemical metering pumps. A custom backlit display provides constant information regarding controller and system conditions.

High and low alarm points, delay and limit timers and other user programmable features make the DR5000 the most adaptive ORP (redox) Controller available.

  • Custom Backlit LCD Display
  • High and Low Set Points
  • Limit Timers for Each Output
  • ±2000 mV Scale
  • ORP Programmable Response Delay
  • 4-20 mA Recorder Output (Option)
  • Proportional Pulse or Relay Output both Standard
  • CUL, UL and CE certified
Display Items
  • Current mV Value
  • Current mA Output Level
  • Current Pump Speed
  • Timer Settings and Readings
  • Alarm Conditions

Enclosure  · Electrical  · Operational  · Agency Approvals


NEMA 12X Type (prewired version)

Hard wiring makes the unit suitable for NEMA 4X applications

Housing Material

Flame retardant, molded TPE

Cover Material

Clear molded polycarbonate, padlockable


0 to 95% Relative Humidity (non-condensing)
32º F to 122º F (0º C to 50º C)


115 VAC & 230 VAC Proportional units provided with a 6 ft (2 m) grounded power cord & plug and two 10 ft (3 m) output cables for direct connection to '7' and '9' Series LMI pumps.

115 VAC On/Off units provided with 6 ft (2 m) grounded power cord & plug and two 1 ft (30 cm) output power cords with grounded receptacles for pumps.

230 VAC On/Off units provided with 6 ft (2 m) grounded power cord & plug and throughput connectors for hardwire connection of pumps.



115 VAC, 50/60Hz
230 VAC, 50/60Hz

Control Output (On/Off)

Five (5) relays, 10 amp @ 115 VAC, 5 amp @ 230 VAC, Unit fused for 10 amp total load

Control Output (Proportional)

Pulse output signal (100ms pulse width), open collector

Alarm Output

1 relay for pump A, 1 relay for pump B
2 relays, 10amp @ 115 VAC (5amd @ 230 VAC)

Switch closure

Signal Input

BNC type

Data Output

4-20 mA spanning the ORP range



Custom multiline backlit LCD

ORP Scale

± 2000 mV

Limit Timers

Adjustable 0-11 h

Differential (Hysteresis)

Keypad adjustable

Agency Approvals

Agency Approvals


·  Dimensions (LMI Liquitron™ DR5000 Series ORP Controllers)


Liquitron™ DR5000 Series ORP Controllers
(PDF, 109KB)