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Honeywell HPW7000 Hi-pHurity Water pH and ORP Measurement System

Hi-pHurity Water pH and ORP Measurement System

The HPW7000 Hi-pHurity Water Measurement System is an electrode mounting assembly designed specifically for the difficult pH and ORP measurement in high purity water applications. The special flow chamber and electrode mounting simplifies installation and calibration while providing a pH or ORP measurement that is unsurpassed in accuracy and stability. The HPW7000 combines a specially designed stainless steel stainless steel flow chamber with a measuring/reference electrode system and integral temperature sensor/solution ground. This mounting assembly provides accurate and stable pH and ORP measurement in low conductivity (<10 μmho/cm) water.

The specially designed flow chamber optimizes the sample flow volume and creates the roper flow and mixing patterns to make the most accurate and stable pH and ORP measurement. In addition, the assembly installation is foolproof. The flow chamber cover is keyed and the electrode position is fixed so that the user will continue to get the same superior measurement results every time a calibration or replacement is done. A quick opening clamp holds the electrodes in place in the flow chamber. Removing and re-Installing the electrodes for calibration is quick and easy with this clamp mechanism.

A flowing reference electrode is used to provide high accuracy and minimize calibration offset errors. A new flowing reference electrode design uses less electrolyte and does not require a large head pressure. This makes the mounting more compact in water sample panels where space is at a premium. Electrode cables of up to 36 feet eliminate the need for mounting preamplifiers on the assembly. All electrode terminations are internal to the analyzer and are protected by the analyzer case. The electrode cables are all shielded to reduce the susceptibility to noise and make the measurement more stable.

HPW7000 Mounting Assembly Includes:

  • Stainless Steel Flow Chamber with Electrode Mounting Cover
  • 1/4" Inlet/Outlet Process Connections
  • Flowing Reference Electrode (P/N 51198296-501)
  • Combined Temperature Sensor/Solution Ground
  • Flowing Reference Reservoir and Tubing

Options Available:

  • Panel Mounting
  • 20 Foot (6,10 meters) or 36 Foot (10,97 meters) Cables for connection to UDA2182
  • 1.5 Foot (0,46 meters) or 36 Foot (10,97 meters) cables for connection to pH DirectLine Modules
  • Stainless Steel or Ryton Electrode Covers
  • Panel Mounting
  • The pH assembly can be used with the remote mount DirectLine transmitter DL421-X-4-B-XXXX (see 51-52-16-71 / DL1-2); and the UDA2182 (Direct electrode input - no preamp)
  • The ORP assembly can only be used with the UDA2182

• Designed for high purity water applications, <10 μmho/cm conductivity
• Easy to install and ensures correct operation and maximum performance
• Reduces calibration and maintenance time and cost with a quick disconnect clamp top cover that allows the electrode assembly to be easily removed without tools or special instructions
• Lower maintenance cost and higher availability with a new reference electrode that is easy to fill and does not require any special tools or instructions
• Unsurpassed stability
• Minimal long term drift
• Minimizes calibration errors
• Small assembly that can be panel or surfaced mounted
• Improved temperature sensitivity
• Sample flows 50-500 cc/min

pH Range (operating)
ORP Range
0 – 14 pH (4 to 10 pH)
-1600 to +1600 mV
Temperature Sensor -20 to 150°C
Conductivity Range < 10 μmhos/cm
Accuracy (pH) ±0.1 pH
Noise (pH) <0.1 pH
Stability/Drift (pH) ±0.1 pH/wk
Process Connection 1/4" male - side mounted on flow assembly
Pressure Downstream back pressure –10" W.C. (min), +1.0" W.C. (max)
Temperature Assembly: 10° - 45°C
Electrodes: 10° - 80°C
Flow Assembly 316 LSS
Electrode Covers 316 LSS
Finish 150 grit polish minimum

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