LMI Milton Roy Liquitron DP5000 pH Controller — 115V

The Liquitron DP5000 monitors pH and controls chemical metering pumps for neutralization and process water treatment. Its backlit LCD provides operating and alarm information, while adjustable setpoints, response delays and run-limit timers help operators configure the chemical-feed process.

Controller only. Electrode, probe cable assembly and installation fittings are sold separately. Choose the pump-control connection below, then contact Water Treatment Resource for help selecting the required inline or submersible probe package and temperature-compensation components.

Choose Your Pump-Control Output

A — On/Off: Switches compatible pump power using relay outputs. The 115V version includes a 6-foot grounded power cord and two 1-foot output cords with grounded receptacles for pumps.
B — Proportional pulse, legacy LMI: Select for the compatible B7, C7, B9 and C9 pump connections identified in the model-selection chart. Includes proportional output cables.
C — Proportional pulse, compatible newer LMI: Select for the compatible AD9, PD7 and other specified LMI pump connections. Includes the corresponding proportional output cables.

Proportional control uses pulse signals to a compatible pump. Please confirm the complete pump model and connector before ordering a proportional version. A pulse-output connection is different from the optional 4–20 mA recorder output.

Included Configurations

Manufacturer model	Pump-control output
DP5000-1A-0	A - On/Off pump output
DP5000-1B-0	B - Proportional pulse (legacy LMI)
DP5000-1C-0	C - Proportional pulse (compatible newer LMI)

Key Specifications and Functions

Manufacturer: LMI / Milton Roy
Series: Liquitron DP5000
Measurement: pH, 0–14 with 0.01 resolution
Supply: 115 VAC, 50/60 Hz, USA plug
Mounting: Wall mount
Pump control: Two pump-control channels; select the output connection above
Display: Backlit LCD
Process functions: High/low setpoints and alarms, programmable response delay and output limit timers
Limit timers: Adjustable up to 11 hours
Interlock inputs: Low-level and flow-switch inputs
Recorder output: Optional 4–20 mA output is not included in these -0 configurations

Probe and Installation Selection

A complete installation requires a suitable pH electrode and cable assembly. Inline installations also need compatible mounting fittings or a tee. Probe materials, cable arrangement, temperature compensation and installation method must match the application. Pumps, electrodes, probe cables, mounting tees, manifolds and external switches are not included in this controller-only listing.

Please call or email for pH probe packages, temperature compensation, other voltages, or optional isolated 4–20 mA recorder output. Contact Water Treatment Resource for current availability and configuration assistance.

Manufacturer Literature

Download the Liquitron DP5000 data sheet

DP5000 LMI Milton Roy Liquitron pH Controller – 115V

Available Options

Have a question?