Product Details

Alpha DO1000 1/4 DIN Dissolved Oxygen Controller / Transmitter



Product Features


:: Built-In Programmable Limit, Proportional (Pulse Length or Pulse Frequency) - ideal for precision process control applications
:: User-Customization through Advanced Setup Menu offers flexibility in matching the controller's functions to suit individual's specific requirement
:: Readout in mg/L, pm or % saturation
:: Barometric and Salinity Automatic Compensation after manual input
:: Hold Relay for use with float switches/flow switches and other controllers as a failsafe function
:: Two Level Password Protection prevents un authorized tampering with settings
:: 0 to 2000 Second Time Delay Adjustment on control and alarm delays
:: Galvanically Isolated Scalebale 0-20/4-20 mA Outputs
:: Wash Contact Relay controls electrodes cleaning systems at desired duration and frequency
:: Choice of General Purpose or Low DO measurement for wider applications
:: Adjustable Hysteresis (Dead Band) prevents rapid contact switching near set point
:: Non-Volatile Memory retains all stored parameters and calibration data even if power fails
:: Large Dual Display shows DO with temperature simultaneously - features clear multiple icons, set points, and status messages
:: Choice of Temperature Sensor Pt100/Pt1000 with 2-wire or 3-wire temperature input selection
:: Easy Installation and Wiring with detachable plug-in connectors




Product Specification


DO Range

mg/l of oxygen: 0.00 – 20.00 mg/l
% saturation of oxygen: 0.0 to 200.0% saturation

Resolution & Accuracy

0.01 mg/l or 0.1%
± 1.5% of full scale reading

No. of Calibration Points

1 (100% saturation) or
2 (100% and 0% saturation) points

Flow Rate

±1 – 2 cm/sec
(dependent on both Temperature & Oxygen level)

Response Time

40 – 50 secs to attain 95%

Temperature Range

-9.9 to 125 °C

Resolution & Relative Accuracy

0.1 °C & ±0.5 °C

Temperature Sensor

Pt 100

Temperature Response

Approx. 1 min/ °C

Temperature Compensation

Auto / Manual (reference at 25 °C)

Pressure Input

K. Pas/mm Hg (Manual input and Automatic correction)

Salinity Input

0.0 to 50.0 ppt (Manual inout and Automatic correction)

Set Point and Controller Functions


Limit / Proportional (pulse or frequency) controller

Adjustable Period with Pulse Length Controller

0.5 to 20 secs

Adjustable Period with Pulse Frequency Controller

60 to 120 pulses/min

Switching Hysteresis

0.1 to 1.0 mg/l or 0 to 10.0%

Pickup / Dropout Delay

0 to 2000 seconds

Contact Outputs, Controller

2 potential free change-over contacts

Switching Voltage / Current / Power

Max 250 VAC / Max 3A / Max 600VA

Alarm Functions

Function (Switchable)

Launching or Pulse

Electrical Data and Connections

Power Requirement

220 VAC (jumper selectable) ;48 to 62 Hz ; max. 7 VA

DO Input

2-pin terminal

Transmitter Function

0/4 to 20 mA scalable outputs for Dissolved Oxygen, galvanically isolated


Max. 600 Ω

Connection Terminal

5-pole, 17-pole terminal, detachable blocks

Main Fuse/ Fine Wire Fuse

Slow-blow 250 V/ 100 mA

EMC Specifications

Emitted Interference

According to EN 50081-1

Immunity to Interference

According to EN EN 50082-1

Environmental Conditions

Maximum Relative Humidity

10 to 95%, non-condensing

Ambient Temp. Operating Range

0 to 50 °C

Mechanical Specifications


175 x 96 x 96 mm


Max. 0.7kg


ABS with polycarbonate


IP 54 (Front Panel)


Ordering Information


Order No.



Alpha DO1000 Dissolved Oxygen Controller/Transmitter with 0/4-20 mA Output and 220VAC Setting (Unit Only)


Download Brochure

Alpha 800 & 1000 Series


Related Accessories

DO Process Electrodes

© Copyright 2010 ITLIPL Designed by DBS   Home | About Us | Products | What's New | Career | Clients | Contact Us