| Online pH Systems | Online Redox / ORP Systems | Online Conductivity / TDS System | Online Chlorine Analyzer | Online Turbidity System | Online TOC Analyzer

Dissolved Oxygen Controller/Transmitter

Product Featuresdss1

The Alpha DO 1000 controller/transmitter accepts low-range and general range probe for extensive measurement range of Dissolved Oxygen in ppm, mg/L or % saturation. Versatile controller/transmitter offers three Dissolved Oxygen control mode: limit control, proportional pulse length control and proportional pulse frequency control.

::

Accepts low range probes (0 to 10 ppm) and general range probes (0.5 to 40 ppm)

::

Allows one point or two point DO calibration. Meter displays electrode information after each successful calibration. Previous calibration data is retained in the event unsuccessful calibration

::

Automatic salinity and pressure compensation after manual input for more accuracte readings

::

Option of Auto or Manual Temperature Compensation. Three-wire system compensates for cable-length resistance errors

::

Galvanically-isolated, scaleable 0/4 to 20 mA output for high-quality output on peripheral devices

Applications

General: Useful for monitoring temperature and control of DO in wastewater treatment and aquaculture applications. Use with valves, blowers or aerators to ensure proper system operation.

Specifications

Product Specification

Description

Dissolved Oxygen

Range

0.00 to 20.00 mg/L ; 0.0 to 200.0 %

Resolution

0.01 mg/L ; 0.10 %

Accuracy

±1.5 % of full scale reading

Temperature

Range

-9.9 to 125.0 ºC

Resolution

0.1 ºC

Accuracy

±0.5 ºC

Sensor

Pt100 ; 3 wire

Compensation

Temperature Compensation

Auto/manual

Salinity Compensation

0.0 to 50.0 ppt
(manual setting and automatic correction)

Pressure Compensation

kPa/mmHg
(manual setting and automatic correction)

Set Point And Controller Functions

Set Point 1 (SP1) /
Set Point 2 (SP2)

0.00 to 20.00 mg/L or 0.0 to 200.0 %

Switching DO Hysteresis

0.1 to 1.0 mg/L or 0 to 10.0 %

Function (Switchable)

P control (pulse length/pulse frequency);
limit control

Adjustable Period With Pulse Length Controller

0.5 to 20 sec

Adjustable Period With Pulse Frequency Controller

60 to 120 pulse/min

Pickup/Dropout Delay

0 to 2000 sec

Contact Outputs

3 SPDT relays

Switching Voltage/
Current/Power

Max. 250 VAC / max. 3 A / max. 600 VA

Alarm Functions

Function (Switchable)

Steady or fleet (pulse)

Pickup Delay

0 to 2000 sec

 

Switching Voltage/
Current/Power

Max. 250 VAC / max. 3 A / max. 600 VA

Electrical Data And Connections

Transmitter Function

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

Hold Function Switch

To freeze output current and deactivate control relays

Load

Max. 600 Ohm

DO Input

2-pin terminal

Connection Terminal

5-pole, 17-pole terminal, detachable blocks

Display

LCD

7 segments display with symbols for status information

Power Supply

Input

110 VAC
(jumper selectable) ;
48 to 62 Hz ; max. 7 VA
(For TSDOCTP1001)

220 VAC
(jumper selectable) ;
48 to 62 Hz ; max. 7 VA
(For TSDOCTP1002)

Main Fuse

Slow-blow 250 V / 100 mA

Pollution Degree

2

Transient Overvoltage Category

II

EMC Specifications

Emitted Interference

According to EN 50081-1

Immunity To Interference

According to EN 50082-1

Environmental Conditions

Operating Temperature Range

-10 to 50 ºC

Max. Relative Humidity

80 % up to 31 ºC decreasing linearly to 50 %
at 40 ºC

Mechanical Specifications

Dimensions (WxHxD)

96 x 96 x 175 mm

Weight

700 g (unit) / 800 g (packed)

Ingress Protection

IP54 (front panel)

Dissolved Oxygen 2-Wire Transmitterdss2

Product Features 

The Alpha DO 500 Transmitter transmits dissolved oxygen readings across a wide measurement range to the peripheral instrument of your choice, reliably and accurately.

::

Measures dissolved oxygen (in mg/L, ppm and % saturation) simultaneously with temperature

::

±1.5 % full scale accuracy

::

Quick, easy calibration using atmospheric air as calibration media for 100 % air saturation

::

Push-button calibration – quick, easy, no hassle

::

High quality, high resolution output at chart printers and other secondary devices

::

Reliable, accurate measurements at different temperature with Automatic Temperature Compensation

::

Offset Adjustment Function allows you to adjust readings conveniently without having to remove electrode from the measurement tank or pipe

Specifications

Product Specification

Description

Dissolved Oxygen

Range

0 to 19.99 mg/L / 0.00 to 19.99 ppm
0 to 199.9 % saturation

Resolution

0.01 mg/L or 0.01 ppm
0.1 %

Accuracy

±1.5 % full scale

Temperature

Range

0.0 to 100.0 ºC

Resolution

0.1 ºC

Accuracy

±0.5 ºC

Sensor

Pt100; 2 or 3 wire

Compensation

Auto/manual (0 to 50 ºC)

Pressure

Compensation

0.74 to 3.00 bars
550 to 2250 mmHg
10.7 to 43.5 psi
(manual setting and automatic correction)

Salinity

Compensation

0.0 to 50.0 ppt
(manual setting and automatic calibration)

Transmitter:

Transmitter Function

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

Out-Of-Range Current Output

3.8 mA:
‘On’ select selects 3.8 mA
‘Off’ selects 4 mA (under range)
Selects 20 mA (over range)

Hold Current Output

22 mA:
‘On’ select selects 22 mA
‘Off’ selects last measured current value

Load

Max. 600 Ohm

Electrical Data And Connections

DO Input

2-pin terminal

Connection Terminal

3-pin & 8-pin terminal, detachable blocks

Display

LCD

7 segments display with symbols for status information

Power Supply

Input

12 to 24 V DC

EMC Specifications

Emitted Interference

According to EN 61326

Immunity To Interference

According to EN 61326

Environmental Conditions

Operating Temperature Range

0 to 40 ºC

Max. Relative Humidity

80 % up to 31 ºC decreasing linearly to 50 %
at 40 ºC

Mechanical Specifications

Dimensions (WxHxD)

96 x 96 x 66 mm

Weight

210 g (unit) / 310 g (packed)

Ingress Protection

IP65

Process DO Electrodes ECDOTPIIS

dss3

Specifications

Product Specification

Description

Dissolved Oxygen Range

0.03 to 20 ppm

Type

Galvanic

Flow Rate

50 mm/sec (dependent on temperature and O2 level)

Response Time

40 to 50 sec to attain 95 % of actual reading

Temperature Sensor

Pt100

Pressure Rating

6 bar (87 psi)

Operating Temperature

0 to 50 ºC / 32 to 122 ºF

Material

Delrin housing

Membrane

HDPE

Cable

Integrated 5 m (16.3 ft) water-resistant, tinned ends

Dimensions: Length (Excludes Cable)

152.4 mm

Dimensions: Diameter (External)

58.4 mm

Weight

670 g

EC237150

Specificationsdss4

Product Specification

Description

Dissolved Oxygen Range

0.04 ppm to saturation

Type

Amperometric

Flow Rate

20 mm/sec

Response Time

Temperature Sensor

22 kOhms NTC

Pressure Rating

4 bar (58 psi)

Operating Temperature

0 to 60 ºC / 32 to 140 ºF

Material

Stainless steel

Membrane

Non-replaceable

Cable

5 m (16.4 ft) fixed and sealed

Dimensions: Length (Excludes Cable)

12 mm shaft diameter

Dimensions: Diameter (External)

178 mm

Weight

670 g

 

Back to Top
Manufacturer of Online Analytical Systems & Laboratory Instruments