Alkalinity Sensor

In-Situ Monitoring of Total Alkalinity

Dartmouth Ocean Technologies introduces a miniaturized, autonomous alkalinity sensor for marine environments that will enable Ocean Alkalinity Enhancement (OAE) and monitor the ocean’s buffering capacity.

Alkalinity Sensor at a Glance:

Accurate measurement of microfluidic alkalinity over the range 1500-2500 µmol / kg
Measurement calibrations against certified reference materials
Programmable sample rate and concentration range
Technology Flexibility: An excellent contender for towed systems, un-crewed vehicles, gliders, ROVs, Voluntary Observation Ships, buoys, and profiling floats
Customizable and configurable to fit into most platforms

Features:

Alkalinity Sensor
Rigid Reagent Housing
Self-Contained
275 samples / 25 standards per reagent load*
Programmable sample interval & range
Easy transport and deployment
Flexible mounting configurations

Options:

Optional power from platform or battery pack
Dual- and Tri-case mounting brackets

→ Alkalinity Sensor Brochure

Alkalinity data - Alkalinity/Salinity/Depth

Customizable for a wide range of applications

Contact us to find out more!
(902) 229-3923

Product Specifications

Weight

In Air: 5 kg (11.0 lbs)
In Salt Water: 1.8 kg (4.0 lbs)

Dimensions

Diameter: 89 mm (3.5 in)
Length: 442 mm (17.4 in)

Depth Rating: 200 m (656 ft)

Sample Rate: 1 sample every 20 minutes to 1 sample per day (programmable)**

Temperature Range: 5-25°C

Intake Filters: 25mm - 0.45µm pore size (default)

Instrument Precision: 16 µmol/kg

Power Draw: 1 W (typ) to 10 W (max)***

Reagents:

Reagents: 0.01 mol/kg HCl with 20 µmol/kg bromocresol green indicating dye
Standards: Prepared Na₂ CO₃ solution or certified reference material

Data Output:

Ethernet, RS232
Binary, Hex

Concentration Range:

1500-2500 µmol/kg (default)
Programmable to different ranges in situ

Options:

Mounting brackets
Software visualization
Real time data output
External battery case (Lithium Primary)
Rigid, floodable reagent case

* Based on current reagent volumes of 500 ml titrant & 250 ml standard
** Standard sample processing time is currently 20 minutes per sample
*** Total number of samples processed will depend on sampling frequency; each measurement consumes about 4.4 kJ of battery energy

Alkalinity Sensor