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Mark 24 Degas Cation Conductivity System

Original price $7,950.00 - Original price $7,950.00
Original price
$7,950.00 - $7,950.00
Current price $7,950.00

Delivery time

In stock and ready to ship

The Martek Mark 24 Degas Cation Conductivity System provides accurate, on-line determination of specific, cation, and degassed conductivity as well as calculated pH measurements in ultrapure water processes. Calibrated to ASTM and NIST standards, the Martek Mark 24 Degas System displays data in direct engineering units on a large colorful display while offering both digital and analog output signals for external recorders and other data acquisition equipment. 

As a steam constituent, carbon dioxide can form carbonic acid and carbonate on dissolution in water. This can severely affect not only cycle corrosion, but mask early condensate pH and conductivity measurements in cycle regions where condensation sets in. They most important paths for CO2 ingress are air and cooling water inleakage, makeup water, ion exchange resins, and plant cycle additives. By precise heating of the process solution to near-boiling after a cation column, carbon dioxide and other low molecular organics are volatilized and removed providing a degassed cation conductivity measurement that results in a more realistic assessment of the process chemistry. 

p/n 184-70







0 to 100℃

0.01 ℃

±0.1 ℃ 


0 to 1.0000 µS/cm

0 to 10.000 µS/cm

0 to 100.00 µS/cm

0.001 µS/cm

0.01 µS/cm


±0.01 µS/cm

±0.1 µS/cm

±1.0 µS/cm

pH (calculated)

0 to 14 pH units

0.01 pH units

±0.1 pH units

*NOTE: The accuracy of conductivity measurements is dependent on appropriate cell constant in the scale of measurement and on the quality of the electrode.


100-240 VAC, 50/60 Hz, 0.4A Max @ 25℃. Optional 24VDC

Recorder Output

Two isolated, assignable, current loops per sensor (standard). Full featured PID control for conductivity or pH.

Digital Protocol

MODBUS RTU, DeviceNat, Profibus DP/V1, Ethernet/IP

Alarm Output

Three Form C Relays (standard): 5A, 250 V. Additional three Form C Relays optional


Ambient operating temperature range: -20 to 60℃


Analyzer: CE: EN6100 -4-2, -4-3, -4-4, -4-5, -5-6, -4-11

Panel Dimensions

14 inches (35.6 cm) width x 26 inches (66 cm) height x 6.0 inches (15.2 cm) depth


30 pounds (13.6 kg)


Panel (a stand is available allowing for portable applications)

Wetted Parts

Type 316 Stainless Steel, Teflon, Delrin, Acrylic


All inlets use 0.25 inch Type 316 Stainless Steel Swagelock fittings

Manufactured in



Part Number



Mark 24 Degas Cation Conductivity System


Optional Stand (set of four L-Brackets)

NOTE: All prices FOB Factory. Warranty subject to certain conditions. Consult factory for specific warranty information. Specifications and prices subject to change without prior notice. 


A cooled condensate sample stream is fed to the Martek Mark 24 Degas System. The sample flow is controlled by a flow meter and directed to a conductivity sensor that measures the specific conductivity of the inlet stream. Next, the sample passes through a cation exchange column then is fed through a second conductivity sensor that measures the cation conductivity. Finally, the sample is sent to the boiler where it is heated to near boiling to allow carbon dioxide and other gasses to be vented off through an expansion chamber. The hot sample stream is directed through a third conductivity sensor that measures the degassed conductivity. The effluent from this last sensor then goes to drain. In addition, the specific and cation conductivity measurements can be used to provide a calculated pH measurement eliminating the need for additional, costly instrumentation.


• Not one, not two, not three, but FOUR measurement checkpoints make the Mark 24 a trusted panel in the most critical environments especially for condenser tube leaks.
• Accurate, calculated pH measurement saves time and money
• Backed by ASTM and NIST standards so you can trust the measurements and move on
• Sleek and thoughtful design make even this panel portable


• Measures and displays Specific, Cation, Degassed Cation Conductivities, and Calculated pH
• Large, colorful screen displays up to four sample points simultaneously
• User-friendly interface and easy-to-use menus in seven languages
• Up to eight analog current outputs
• Up to six alarm and control relays
• Multiple digital communication protocols
• NEMA 4X, IP66 waterproof rated analyzer case allows field-compatible upgrades via USB data port
• Portable stand available


The Martek Mark 24 Degas Cation Conductivity System includes the following items:
• Mark 24 Analyzer
• Three Conductivity Flow-Thru Sensors
• Cation Column
• Reboiler
• Flow meter


The ability to provide traceable calibration and verification data make the Mark 24 ideal for a variety of applications related to ultrapure water analysis:

• Nuclear and Fossil Fuel Power Generation
• Condensate polishing Systems and Demineralizers
• Semiconductor Fabrication
• Pharmaceutical Manufacturing plants
• Other Industrial applications where ultrapure water monitoring is essential

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