Welcome to Watcon: Global expert on water quality monitoring and chemical dosing
Interested? Give us a call at +31 (0) 30 - 6912235 / +31 (0) 6 - 11342248

Pressure Relief Valves

To protect analysers, personel and sample coolers for damage by sample overpressure.

  • Calculated for the application.
  • ss 316 materials.
  • Tested and adjusted in the workshop with certificate.

Pressure reducers

As Watcon is an independend company and we are free to choose the best components for the application.

  • Rod in tube for trouble free high pressure reduction.
  • Needle valves, metering valves for lower pressures and secondary fine tuning.
  • Self actuated pressure reducers, only under certain process conditions.

Back pressure regulators

Used after pressure reduction to maintain constant upstream pressure, surplus sample pressure is blown off in the drain, equalizing fluctuations in the sample supply pressure. This will result in a constant flow through the chemical sensors’ flow cells. Again we are free to choose the best solution on the market, the best price/performance ratio for the application with high or low capacity, and a fixed pressure or adjustable. Important for selecting the right type,

  • Fluctuation range of sample pressure,
  • Sample cooler capacity as the (blow off) flow could get (too) high.
  • Debris to be expected?
  • Maximum allowable pressure analyzing equipment?
  • Suitable for pressure reducer characteristics?
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Thermal shut off valve

Used to block the sample line if a temperature threshold is passed. For the protection of personnel and analyzing equipment when the cooling fails or when the capacity of the sample cooler is exceeded.

  • Stainless steel materials
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  • Suitable for high pressures, high temperatures.
  • Automatic reset or reset at the system
  • Wide range of setpoints
  • 100% protection.

Please consult for the best price-performance ratio for your application.

Sensor flow through vessel

Another custom-made specialty of Watcon is analyzing sensors or probes for pH, Conductivity, Dissolved Oxygen and others that are placed in a sample flow through the vessel. Often delivered by the analyzer equipment manufacturer but not always suitable for the application. Watcon designs and manufactures these special flow-through vessels for the analyzer OEMs.
Points to be considered:

  • materials (ss316, duplex, titan) suitable for medium,
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  • easy removal of the sensor for calibration,
  • flow direction,
  • air entrapment,
  • debris to be expected,
  • pressure class,
  • static electricity

We have 30 years of experience, please consult for your application.

Extraction device

It is vital to have a representative sample to be analysed, meaning that the chemical composition at the sampling system is the same as in the pipe the sample is taken from.

  • The code ASTM D1066 gives guidelines for the design of steam and water extraction devices to come to a representative sample.
  • Watcon manufacters and delivers these devices including block valves.
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  • Together with the correct calculated and correct installed sample lines to the system an isokinetic and thus representative sample arrives at the system.

Cooling Water, Additions

The sample systems need cooling water of good quality to cool the steam and water samples to 25 °C. If the cooling water contains chlorides or hardness this can cause stress corrosion cracking of the coil material or block the cooling water passage in the counter current coolers due to hardness deposits.
By choosing a higher grade material than ss316L for the coils the cracking can be avoided most of the time. Blockage remains a problem. Therefore potable water, brakisch water and seawater used as a coolant will need extra attention.

Closed cooling water loop

  • Complete turn key unit, integrated in system or skid mounted
  • When only lower quality cooling water is available.
  • Filled with demiwater plus additive
  • With a moderate temperature ss 316 plate heat exchanger and all components needed.
  • Please ask!

Cooling water booster pump

  • Complete turn key unit, integrated in system or skid mounted.
  • When cooling water supply pressure is too low for the delta p needed (1 bar).
  • ss316 materials for wetted parts.
  • Please ask.

Chiller unit

  • Complete turn key unit, integrated in system or skid mounted.
  • Closed loop Cooling water refrigerator unit.
  • when no cooling water is available or as a
  • secondary cooling when cooling water temperature is too high to achiev 25 °C sample temp.
  • Air or water cooled.
  • Self regulating to keep the optimal temperature.
  • Ex chiller units suitable for hazardous zone’s available !!

Cation Resin

As a filter material for filling of the cation filters Watcon supplies:

Cation resin H+ with color indication, the color changes from green to blue when exhausted.

Please read our cation bulletin for more information.

Link to PDF file

  • Tested in comparison with other brands and found the most effective in terms of H+ exchange and longevity.
  • The best functionality and most cost effective.
  • Consumption depends on the concentration of ammonia and the sample flow,
  • Available from stock in 25 Ltr. resealable drums, worldwide delivery.
  • MSDS included.
  • Available from stock.

Order now !

De-gassed conductivity

The de-gasser or CO2 filter eliminates the contribution of CO2 to the conductivity value. Than the true conductivity caused by impurities can be monitored. Please note that CO2 removal is done after removal of ammonia (Cation Conductivity)
There are two methods to remove the dissolved CO2 in the sample, by boiling or “washing” out with an inert gas, like Nitrogen.
The boiling method is complicated introducing potential technical failures, use of energy and high temperature conductivity measuring or sample
cooling down with potential measuring failure and lag time, Watcon prefers to use the gas washing method. (Sparger)

  • Simple design and principle
  • Less potential faults
  • Little maintenance
  • Less installation costs
  • Low cost of ownership
  • Effective method. See comparison test
  • Quick measurement with little lag time.
  • Suitable for Ex zone. 


Contant head vessel

Watcon designs and delivers constant head vessels giving an always constant pressure and flow to the analyser through gravity.

  • Located above the analyser.
  • Always a constant pressure and flow.
  • Excess sample diverted to drain.
  • The vessel can be equipped with a magnete to catch magnetitie which pollutes electrodes.
  • The magnetite is easily flushed to drain by removal of magnete.

Magnetite is a browm ferrous powder which pollutes the analyser sensors and can be present in the sample, especially drumwater after a stop.

There are several other methods available to overcome the magnetite pollution, please ask !