Shellfish Aquaculture

Atlantic for PH and Redox

The Atlantic pH is an accurate, reliable and easy to use instrument with features that make it suitable for a large number of tasks.

It can be used for both pH or redox, and the user can set the range.


  • Atlantic for pH and Redox (ORP)

  • Advanced single channel meter

  • Reliability, accuracy and ease of use with advanced facilities

  • Trouble-free pH or redox measurement

  • Automatic or manual temperature compensation.

  • Additional compensation input

  • User selectable range

  • Alarm signals

  • Delayed alarm signals

  • Pulsed output for cleaner control

  • 8 set points

  • 8 timers

  • 4 relays


The Atlantic for pH redox is an accurate, reliable and easy to use instrument with features that make it suitable for a large number of tasks. It can be used for both pH or redox, and the user can set the range. The Atlantic has 4 relays and a 4-20 mA output. A 4-20 mA compensation input can be added. The Atlantic incorporates 8 alarm set points and 8 timers that can be logically linked to obtain a multitude of useful functions.


pH or redox – just use the right electrode!
Atlantic can be used for either pH or redox measurements, depending on which electrode is used. The user can select the range.


Safety First!

Atlantic has four relay outputs and 8 set points. There will always be at least one relay output that can be used to give alarm if the pH level or the temperature goes outside the set limits. Atlantic measures both parameters and has logical linking so you only need to use one relay.

Timer functions

Atlantic has 4 timers that can be used for a number of purposes. For example, alarm can be delayed so that only a sustained fault results in alarm being given.

Automatic temperature compensation.

If the process temperature changes it is necessary to compensate the pH measurement accordingly. Most processes take place at a specific temperature, so the temperature is set manually – the calibration temperature is set when calibrating, the process temperature when measuring. If, however, the process temperature changes then a temperature sensor can be connected and compensation takes place automatically.

Choice of accuracy

The greater the accuracy, the more time a measurement needs. The same is true for calibration. If you need fast measurements you can set Atlantic to make a fast calibration. For higher accuracy you can set Atlantic to make a slower and very thorough calibration. You can also choose how many decimals are displayed.


Atlantic pH for Industry


Semi-Automatic pH Calibration

Calibration with Atlantic is easy. It is, of course, necessary for you to take the probe up and put it in buffer solutions, but the Atlantic tells you what to do, and makes the adjustments automatically.
You need two buffer solutions – pH 7 and pH 4, as well as clean water for rinsing the electrode.
Buffer solutions for initial calibration are provided with the Atlantic. Redox measurements are regarded as absolute and thus do not need calibration – a check solution is provided when you purchase an Atlantic with redox probe so that you can check operation.

Atlantic can dose base…

One of Atlantic’s four relays can be used to control a valve to dose base to raise the process pH

And acid…

A second relay can be used to control a valve to dose acid to lower the process pH.

Or both

Of course, with 6 set points and 4 relays there is no problem in
letting the Atlantic dose both base and acid as needed. Timers can be included to give pulsed dosing so that the process has longer time in which to react.

Probe cleaner control

The Probe Cleaner uses compressed air, and has proved very effective. A timer and relay in
Atlantic can control the compressed air, whilst a second timer “freezes” the output when cleaning.

Specification - pH Probes

Size: Max. diameter 50 mm. Height approx. 225 mm (to top of cable gland).
Thread Mount Type: 1″ BSP thread.
Threaded Top Type: With 1″ BSP thread on top part of probe.
Light Duty pH electrodes: pH 0 – 14; T: 0 – 60°C; Pmax 6 bar (at 25°C). Aquaculture, drinking water etc.
Heavy Duty pH electrodes: pH 0 – 14; T: 0-130°C; Pmax 6 bar (at 25°C). Waste water, industrial use etc.
Specifications – Atlantic Transmitter

Construction: ABS enclosure with display, indicators, pushbuttons and alarm buzzer.
Dimensions & weight: b x h x d: 213 x 185 x 95 mm, 1.2 kg.
Supply & consumption: 230 VAC, 115 VAC +/-10% or 9 to 36VDC. 10 W. Specify when ordering.
Operating conditions: -10 to +50°C. Max. 90% humidity non-condensing. Enclosure IP65.
Storage conditions: -10 to +60°. Max. 90% humidity non-condensing.
Measurement inputs: From probe: mV signal. Scaleable ranges.
Compensation input: 4-20 mA. Scaleable. Max voltage drop 5V at 20 mA.
Analogue output: 4-20 mA. Max. load 820 ohm (total). User selectable range & parameter.
Fully galvanically isolated from all inputs.
Display: Graphical LCD with backlight. Max 4 figures, 2 decimals, 13 mm height.
Conversion accuracy: To display and analogue output < +/- 0.1%.
Non-linearity and repeatability typically < +/- 0.1% of actual value.
Relay outputs: 4, with potential free changeover (SPDT) contacts. Selectable mode (direct or inverted), and linking to parameter or logical argument. Max 200VA or 1A AC, recommended max 24 VAC (abs. max 250 VAC). 2A at 24 VDC.
Logical functions: Direct, inverted, multiply. With “and” and “not and” linking.
Alarms/set points: 8, variable hysteresis about set point. Selectable parameter, values & linking.
Timers: 8, from 1 second to 9999999 seconds (99 days). Selectable period, duty cycle and offset. Can activate or be activated by alarm. Can freeze the output. Can activate relays. Can be reset from front panel.