Pump Controllers
Summary of Models and Styles

The Delta Controls Model 351 is a 4-20 mA single pump controller. It has relay position fail-safe selection.

The Delta Controls Model 352 is a 4-20 mA Input 2 Relay Pump Controller (Alarm). It has two 5A SPDT relays with individual ON and OFF setpoints and selectable Lead/Lag pump rotation.

The Delta Controls Model 354 is a 4-20 mA Input 4 Relay Pump Controller (Alarm). It has four 5A SPDT relays with individual ON and OFF setpoints and selectable pump rotation of up to 4 pumps.

The Delta Controls Model 858 is Delta's top-of-the-line ultrasonic level measuring, transmitting, and controlling instrument. It includes an isolated 4-20 mA current output for level transmission or variable speed pump control. It also has 6 relays for pump control or alarming, and the ability to communicate serially with a host computer.

The Delta Controls Model 358 is the same as the model 858, except it accepts mADC and VDC inputs from any transmitter. It is usually used with a series 550 line pressure or head pressure sensor.

The Delta Controls Model 873 is an ultrasonic level controller with 2 or 4 relays for alarming or pump control.

Model 513 - single channel (shown)
Model 512 - dual channel
Model 514 - quad channel

Delta Controls conductance switches produce a switching action as a conductive material touches the tip of its sensing probe. An individual probe is required for each switch action point. Each of the switch stations may be wired for alarm action or for differential pump control action.

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