Walchem Sensors for Walchem Controllers


Walchem’s WEL Series electrodeswalchem sensors

Cost-effective differential pH and ORP electrodes
for industrial applications. They are modular in design with a rugged CPVC housing that
contains the electronics; pH and ORP cartridges can easily be connected or replaced in
minutes without tools.

Walchem WEL Manual

[ezcol_1half]Differential preamp
Universal mounting, easy to install
Easily replaceable electrode cartridges
Electronics are not discarded with the electrode
Optional ATC
Cartridge Styles:
Flat Surface
Bulb / Rod[/ezcol_1half] [ezcol_1half_end]HF Resistant
Low Ionic Strength pH cartridge
Resistant to electronic noise, ground loops
CE Performance & Safety Certifications
Measurement Performance
Range 0 to 14 pH (0 to 12 without sodium ion error) ±1999 mV (ORP)
Response 95% in less than 5 seconds
Temperature Range with preamplifier 32 to 158ºF (0 to 70ºC)
without preamplifier 32 to 212ºF (0 to 100ºC)[/ezcol_1half_end]

Pressure Limit 100 psi


 

Walchem’s amperometric disinfection sensorswalchem sensors

Walchem Disinfection Sensor Manual

offer a cost effective and reliable solution to your disinfection control requirements. Compatible with the WDIS and WebMaster® series controllers, the sensors continuously and directly measure the chemical concentration, without the use of reagents.

We offer sensors, in varying ranges of concentration, for free chlorine/bromine, total chlorine, chlorine dioxide, ozone, peracetic acid and hydrogen peroxide. Whether the application is a cooling tower, food and beverage, drinking water, wastewater, or swimming pool, these sensors are the ideal solution.

  • Low maintenance – no costly reagents or tubing to replace
  • Broad range of applications – wide variety of oxidizers and measurement ranges
  • Fast response – continuous measurement technique
  • No waste – the sample can be returned to the process

 

Walchem Non-Membrane Chlorine and Chlorine Dioxide Sensorswalchem sensors

Walchem Disinfection Sensor Manual

  • Free Chlorine and ClO2 sensors
  • Designed for higher pressure and temperature, clean water applications
  • Amperometric 3-electrode sensors
  • The measuring and counter electrodes are in direct contact with the sample
  • The reference electrode is isolated from the water by an electrolyte-filled housing

Applications:

    • Disinfection of hot potable water systems

as currently required by the new ASHRAE standards

    • Up to 70 °C (158 °F)
    • Hospitals, schools, universities
  • High pressure sample loops where the water cannot be discharged to open atmosphere
    • Up to 8 bar (117 psi)
    • Hot tubs, cooling towers

 

Walchem’s WDS Series Sensorwalchem sensors

Walchem Sensor Mnaual

Differential pH and ORP sensors are designed for industrial applications to be long-lasting and reliable.
Differential measurement technique uses two electrodes, one for the process measurement and the other for the reference measurement.
Replaceable salt bridge for long life
Field proven differential design
Transmits signal 3,000 feet (915 meters)
Walchem preamplifier models are compatible with Walchem controllers
Conventional preamplifier models are compatible with GLI and Aquametrix (Lisle Metrix) controllers
Resistant to ground loop problem

Measurement Performance

Range 0 to 14 pH -2000 to 2000 mV (ORP)
Sensitivity 0.001 pH 0.1 mV
Stability 0.03 pH per day, non-cumulative 2 mV per day, non-cumulative
Temperature 23 to 203°F -5 to 95°C
Pressure Limit 100 psi @ 149°F 0.7 MPa @65°C


 

Walchem Contacting conductivity sensors

Walchem Sensor Brochure

Measure conductivity of a solution via electrodes. They are ideal for use in cooling towers and boilers, reverse osmosis equipment, and other non-oily applications. A variety of cell constants are available to handle a range of conductivities. They are available in several different configurations:

Cooling Tower Contacting Conductivity Sensorswalchem sensor
Contacting ConductivityThese cell constant 1.0 sensors are designed for cooling towers with water up to 30,000 μS/cm. Lower pressure (up to 150 PSI, 10 atm) polypropylene sensors are available with graphite or stainless steel electrodes, and may be installed inline or submersion. High pressure (up to 300 PSI, 20 atm) inline sensors are constructed from stainless steel and PEEK.

WebMaster controllers require active sensors. These sensors contain electronics to convert the sensor signal to a voltage that these controllers can read. W400 series controllers use passive sensors that have cables dressed specifically for them. W100 series controller’s passive sensors are dressed differently.

Performance specifications vary with the type of controller, refer to the controller brochure. Typical cooling tower temperatures are 0 to 70 °C, 32 to 158 °F.

Boiler Contacting Conductivity Sensorswalchem sensors
These cell constant 1.0 sensors are designed for boilers with water up to 10,000 μS/cm and pressures up to 250 PSI, 16.7 atm). These inline sensors are constructed from stainless steel and PEEK.

Performance specifications vary with the type of controller, refer to the controller brochure. Typical boiler temperatures are 0 to 205 °C, 32 to 401 °F.

General Purpose Contacting Conductivity Sensors (for W100 Series)
These passive sensors are available in a variety of cell constants for use in conductivities up to 300,000 μS/cm. Typical applications include RO systems and boiler condensate monitoring. They may be mounted inline or submersion, using either polypropylene (0-100 °C, 100 PSI) or stainless steel (0-120 °C, 200 PSI) ½” NPT mounting fittings.


 

Walchem High Temp & Pressure PH / ORP Sensorwalchem sensor

Walchem Submersion Mount Sensor

Walchem In-line Mount Sensor

Higher temperature rating
Steam sterilizable
High operating pressure
Booted BNC, waterproof cable

PART NUMBER 
102027 Gland, stainless steel, high temperature – low pressure, pH & ORP
102028 Gland, stainless steel, high pressure, in-line, pH & ORP
102029 Electrode, pH, high temperature – high pressure, 10 ft. cable
102963 Electrode, ORP, high temperature – high pressure, 10 ft. cable
102964 Gland, stainless steel, high pressure, ORP


Walchem Electrodeless Conductivity Sensors

PEEK Material Sensor

PEEK Material Sensor

CPVC Material Sensor

CPVC Material Sensor

Walchem Passive Sensor Manual

Walchem Active Sensor Manual

Walchem Brochure & Specs

ECond SensorsElectrodeless conductivity sensors measure conductivity of a solution utilizing encapsulated, non-contacting, toroidal technology.

They may be installed in a variety of very harsh chemical control applications, including oily cleaner baths, chromates, rinse tanks, fume scrubbers and other concentrated chemicals up to a conductivity of 1000 mS/cm. The non-contacting, toroidal sensor technology is immune to thin coatings and the contamination and calibration problems that direct contacting sensors are prone to.

CPVC or PEEK construction
In-line or submersion
W400 and WebMaster controllers require active sensors. These sensors contain electronics to convert the sensor signal to a voltage that these controller can read. Each sensor is specific for the range of conductivity that it can detect.

Measurement Performance for Active Sensors:

Conductivity Ranges: 100–1000 μS/cm, 1000–10,000 μS/cm, 10–100 mS/cm , 100–1000 mS/cm
Conductivity Resolution: 1 μS/cm, 1 μS/cm, 0.1 mS/cm, 1 mS/cm
Conductivity Accuracy: ± 1% of Span within the specified range
Temperature Range: -5 to 80 °C, 20 to 180 °F (CPVC) -5 to 88 °C, 20 to 190 °F (PEEK)
Temperature Resolution: 1 ° (C or F)
Temperature Accuracy: ± 1% of Reading

This document requires Adobe Reader Conductivity Sensor Brochure
This document requires Adobe Reader EC Sensor Manual for W400 & WebMaster
This document requires Adobe Reader EC Sensor Manual for W100 Series

W100 controllers require passive sensors. A single sensor functions over the entire range of conductivity (500 – 2,000,000 μS/cm), and the range is selected in the controller’s software.

Measurement Performance for Passive Sensors:

Conductivity Ranges: 500–12,000 μS/cm, 3,000–40,000 μS/cm, 10,000–150,000 μS/cm ,
50,000–500,000 μS/cm, and 200,000–2,000,000 μS/cm
Conductivity Resolution: 1 μS/cm, 1 μS/cm, 10 μS/cm , 10 μS/cm and 100 μS/cm
Conductivity Accuracy: ± 1% of Span within the specified range
Temperature Range: 0 to 70 °C, 32 to 158 °F (CPVC) 0 to 88 °C, 32 to 190 °F (PEEK)
Temperature Resolution: 1 ° (C or F)
Temperature Accuracy: ± 1% of Reading

 


Walchem copper and nickel sensorswalchem sensor

Walchem Nickel Sensor Manual

Walchem Copper Sensor Manual

Optoelectronic devices that are used in conjunction with Walchem’s on-line analyzers in a variety of applications including electroless copper or nickel baths, microetch baths and a number of other chemistries that contain more than 0.10 grams/liter (g/L) of copper or nickel ions.

Flow-through sensors are available for out-of-tank monitoring of solutions, and immersible sensors (copper only) are available for direct in-tank monitoring.

Measurement Performance – Cu
Electroless Copper Concentration Range 0.1 – 5.5 g/L (0.01 – 0.73 oz/gal)
Microetch Copper Concentration Range 0.1 – 99 g/L (0.01 – 13.2 oz/gal)
Copper Concentration Resolution 0.001 g/L (0.0001 oz/gal)
Copper Concentration Accuracy ±0.01 g/L (0.001 oz/gal)
Note: The measurement range is the range of settings in the controller. Many factors in the chemical
composition affect the absorbance, so Walchem cannot guarantee that every copper solution in this
range can be measured

Measurement Performance – Ni
Electroless Nickel Concentration Range 0.1 – 25 g/L (0.01 – 3.32 oz/gal)
Nickel Concentration Resolution 0.001 g/L (0.0001 oz/gal)
Nickel Concentration Accuracy ±0.01 g/L (0.001 oz/gal)
Optional pH Input Range 0 – 14 pH
Optional pH Resolution 0.01 pH
Optional pH Accuracy Electrode and calibration dependent
Optional pH Automatic Temperature Compensation Pt100 or Pt1000
Temperature Range 0-100°C (32-212°F)
Temperature Resolution 0.05°C (0.09°F)
Temperature Accuracy ±0.1°C (±0.18°F)