Chem Water Solutions

Hach pHD Process pH Sensors for use with Hach's Digital sc Controllers and Digital Gateway.

The inline process pH sensors feature exceptional performance due to the Differential Electrode Measurement Technique. This field-proven technique uses three electrodes instead of the two electrodes used in conventional pH sensors, resulting in unsurpassed measurement accuracy, greater reliability, and less downtime and maintenance.

Hach pH sensors are available in a wide variety of body materials, mounting styles, pH electrode types, and cable connections. PEEK is suitable for most applications, and Ryton is preferred for use in clean water. Use the blue filter bar below to select the right inline process pH sensor for your application.

The smart choice for accurate and reliable online process pH measurement
General Purpose Online Process pH Sensor - pHD Technology, Glass pH Electrode, PEEK Housing, Convertible Mount, 4.5m Cable.

Exceptional Process pH Sensor Performance with the Differential Electrode pHD Measurement Technique
This field-proven technique uses three electrodes instead of the two normally used in conventional pH sensors. Process and reference electrodes measure the pH differentially with respect to a third ground electrode. The end result is unsurpassed measurement accuracy, reduced reference junction potential, and elimination of sensor ground loops. These process pH sensors provide greater reliability, resulting in less downtime and maintenance.

Lower Maintenance Needs with the Double Junction Salt Bridge
The double junction salt bridge creates a barrier to contamination which minimizes the dilution of the internal standard cell solution. The result is lower maintenance needs and a longer time period between calibrations.

Extended Working Life with the Replaceable Salt Bridge/Protector
The unique, replaceable salt bridge holds an extraordinary volume of buffer to extend the working life of the sensor by protecting the reference electrode from harsh process conditions. The salt bridge simply threads onto the end of the sensor if replacement is needed.

Reliability with Built-in Encapsulated Preamp
Encapsulated construction protects the sensor’s built-in preamp from moisture and humidity, ensuring reliable sensor operation. The preamp in the pHD analog sensor produces a strong signal, enabling the sensor to be located up to 1000 m (3280 ft.) from the analyzer.

Patented Technology
The former GLI, now a Hach Company brand, invented the Differential Electrode Technique for pH measurement in 1970. The pHD™ sensor series (U.S. Patent Number 6395158B1, dated May 28, 2002) takes this field-proven technology to a new level.

Cable Length 2:
4.5 m 5-conductor (plus two isolated shields) cable with XLPE (cross-linked polyethylene) jacket; rated to 302 ºF (150 ºC)

Temperature Compensation:

• Automatic with NTC 300 omega thermistor, or manually fixed at a user-entered temperature, additional selectable temperature correction factors (ammonia, morpholine, or user-defined pH/°C linear slope) available for pure water automatic compensation 0.0 - 50 °C
• Automatic with NTC 300 omega thermistor, or manually fixed at a user-entered temperature, additional selectable temperature correction factors (ammonia, morpholine, or user-defined pH/°C linear slope) available for pure water automatic compensation 0.0 - 50 °C

Hach pH sensors are available in a wide variety of body materials, mounting styles, pH electrode types, and cable connections. PEEK is suitable for most applications, and Ryton is preferred for use in clean water. Use the blue filter bar below to select the right inline process pH sensor for your application.

This instrument connects to Claros, Hach’s innovative Water Intelligence System, enabling you to seamlessly connect and manage instruments, data, and process – anywhere, anytime. The result is greater confidence in your data and improved efficiency in your operations. To unlock the full potential of Claros, insist on Claros Enabled instruments.

The smart choice for accurate and reliable online process pH measurement
Clean Water Online Process pH Sensor with Integrated Digital Electronics for "Plug and Play" with Hach Digital SC Controllers - pHD Technology, Glass pH Electrode, Ryton Housing, Convertible Mount, 10 m Cable

This instrument connects to Claros, Hach’s innovative Water Intelligence System, enabling you to seamlessly connect and manage instruments, data, and process – anywhere, anytime. The result is greater confidence in your data and improved efficiency in your operations. To unlock the full potential of Claros, insist on Claros Enabled instruments.

Exceptional Process pH Sensor Performance with the Differential Electrode pHD Measurement Technique
This field-proven technique uses three electrodes instead of the two normally used in conventional pH sensors. Process and reference electrodes measure the pH differentially with respect to a third ground electrode. The end result is unsurpassed measurement accuracy, reduced reference junction potential, and elimination of sensor ground loops. These process pH sensors provide greater reliability, resulting in less downtime and maintenance.

Lower Maintenance Needs with the Double Junction Salt Bridge
The double junction salt bridge creates a barrier to contamination which minimizes the dilution of the internal standard cell solution. The result is lower maintenance needs and a longer time period between calibrations.

Extended Working Life with the Replaceable Salt Bridge/Protector
The unique, replaceable salt bridge holds an extraordinary volume of buffer to extend the working life of the sensor by protecting the reference electrode from harsh process conditions. The salt bridge simply threads onto the end of the sensor if replacement is needed.

Reliability with Built-in Encapsulated Preamp
Encapsulated construction protects the sensor’s built-in preamp from moisture and humidity, ensuring reliable sensor operation. The preamp in the pHD analog sensor produces a strong signal, enabling the sensor to be located up to 1000 m (3280 ft.) from the analyzer.

Innovative Technology
The former GLI, now a Hach Company brand, invented the Differential Electrode Technique for pH measurement in 1970. The pHD™ sensor series (U.S. Patent Number 6395158B1, dated May 28, 2002) takes this field-proven technology to a new level.

Temperature Compensation:
Automatic with NTC 300  thermistor, or manually fixed at a user-entered temperature, additional selectable temperature correction factors (ammonia, morpholine, or user-defined pH/°C linear slope) available for pure water automatic compensation 0.0 - 50 °C

Wetted Materials:
PEEK or Ryton (PVDF), salt bridge of matching material with Kynar junction, glass process electrode, titanium ground electrode, and Viton O-ring seals (pH sensor with optional HF-resistant glass process electrode has 316 stainless steel ground electrode, and perfluoroelastomer wetted O-rings; consult factory for other available wetted O-ring materials)

LCP (Liquid Crystal Polymer), Convertible Mounting Style, 4.5m Analog Cable, 5-Wire with Built-In Preamplifier, General Purpose Glass pH Electrode.

• Exceptional Performance with the Differential Electrode Measurement Technique
• Lower Maintenance Needs with the Replaceable Salt Bridge
• Built-in Preamp or Two-Wire Transmitter
• Versatile Mounting Styles
• 1 year warranty and 30 month pro-rated replacement

LCP (Liquid Crystal Polymer), Union Mounting Style, 3m Analog Cable, 5-Wire with Built-In Preamplifier, pH Glass Electrode for Low Conductivity Solutions.

Exceptional Performance with the Differential Electrode Measurement Technique

This field-proven technique uses three electrodes instead of the two normally used in conventional pH sensors. Process and reference electrodes measure the pH differentially with respect to a third ground electrode. The end result is unsurpassed measurement accuracy, reduced reference junction potential, and elimination of sensor ground loops. These sensors provide greater reliability, resulting in less downtime and maintenance.

Lower Maintenance Needs with the Replaceable Salt Bridge
The salt bridge creates a barrier to contamination which minimizes the dilution of the internal standard cell solution. The result is lower maintenance needs and a longer time period between calibrations.

Built-in Preamp or Two-Wire Transmitter
The built-in preamp produces a strong signal, enabling you to locate the analyzer up to 3000 ft. (914 m) from the sensor. An optional built-in two-wire transmitter is available for applications requiring a 4-20 mA sensor signal. This option requires that the indicating instrument of the measuring system be capable of providing 24 VDC to power the sensor, and have adjustment means to calibrate for zero offset and span.

Versatile Mounting Styles
1.5 inch NPT threads are provided on both ends of the convertible mounting style sensor for either mounting into a pipe tee or attaching to the end of a pipe for immersion. The convertible style enables you to consolidate inventory, and thereby reduce associated costs. A union-mount style sensor and mounting tee are also available to conveniently install and remove the sensor for in-line service.

Common menu guides reduce variability and provide step-by-step procedures for maintenance and pH/ ORP calibration. This standard ¾” and 12 mm pH/ORP sensor deliver fast and accurate measurement.

Part of analogue pH sensor 8362, specially designed for pure water pH measurement.