The DO1000 series 1/4 DIN controller features independents 100% and zero adjustment calibrations and offset adjustment capabilities to ensure high accuracy for your exact conditions. Tailor control relay action to your specifications with selectable time delay and adjustable set point hysteresis bands.

The compact 1/4 DIN size fits into standard panel cutouts. The IP54 rated front panel keypad is weather resistant. Includes mounting hardware.

Control Features:

• Two set point, two SPDT relay operation—choose from low/low, low/high, high/low or high/high control
• Select between three control modes: on/off, proportional pulse length or proportional pulse frequency
• Separately adjustable high and low set point hysteresis bands
• 0 to 2000 second time delay adjustment on relays minimizes false alarms

Advanced Functions:

• Separate alarm relay alerts you to set points exceeded for a specific length of time or a failed temperature sensor
• Key in salinity and pressure manually—controller automatically calculates offset values
• 0-20/4-20 mA transmitter/recorder output
• Selectable readout in mg/L, ppm or % saturation
• Selectable manual or automatic temperature compensation (ATC)
• Two level password protection prevents tampering with settings

Physical Features:

• Uses fast response, low maintenance galvanic probe
• Large dual LCD shows dissolved oxygen reading plus temperature; also displays mode, set points and status messages
• LED indicators signal control activities to monitor status
• Built-in memory backup maintains setup when power fails