These versatile systems are designed for use in all industrial and municipal applications. The sensors are engineered to function normally in applications where conventional sensors quickly fail.
The Q22 Specialty pH/ORP sensors are designed for use with all non-ATI analyzer systems and generic panel meters, allowing these end users to utilize the same robust features of the standard ATI Q25 sensors. The sensors are classified as either Universal or Loop-Powered, depending on the output selected.
The Universal sensor emulate standard, non-amplified combination sensors are designed to interface with all non-ATI pH/ORP analyzers. The sensors require no power supply as the preamplifier is powered by an internal lithium battery. The pH sensor outputs a mV signal in the range of either -500 to +500 mV or 0 to 2 VDC; both are linear over the 0 to 14 pH range. The ORP sensor outputs a mV signal that ranges from -1000 to +1000mV. These sensors may be used as replacement sensors for use with all non-Quantum analyzers.
The Loop-powered sensors require an external 7-30 VDC power supply and provide a 4-20 mA output signal for direct connection to generic panel meters, data acquisition systems or other devices that accept a current input. The sensor includes integral temperature compensation of the pH signal, so no temperature output is provided. The sensor output is uncalibrated, therefore, the receiving instrument must be capable of providing user calibration of the pH or ORP signal on a periodic basis.
- The reference element is a second glass pH electrode immersed in a reference buffer solution This glass reference system allows the sensor to be used in applications that poison conventional pH or ORP sensors.
- All sensor housings are constructed of either PEEK, a high performance thermoplastic that provides outstanding mechanical strength and chemical resistance or 316 stainless steel.
- A large volume, dual junction saltbridge is used to maximize the in service time of the sensor. The replaceable saltbridge allows for easy and inexpensive sensor regeneration.
- The integral preamplifier is encapsulated in the body of the sensor. This creates a low impedance signal output which ensures stable readings in harsh environments and maximizes the distance between sensor and analyzer.
- Sensor electrodes are user specified to ensure measurement reliability and maximum sensor lifetime. The type pH electrode can be selected for optimal performance. The metal ORP electrode is either platinum or gold, depending on the process chemicals.
|Measuring Range||0 to 14 pH; 0 to +1000 mV or ±1000 mV|
|Sensitivity||0.002 pH, 0.2 mV|
|Stability||0.02 pH; 2 mV (per 24 hours, non-cumulative)|
|Wetted Materials||PEEK, ceramic, titanium, glass, Viton, EDPM
Platinum or Gold: ORP
316 SS with sanitary or insertion body styles
|Temperature Compensation||Pt100 or Pt1000 RTD|
|Sensor Cable||6 conductor plus 2 shields, HDPE Jacket|
|Temperature Range||-5 to 95°C|
|Pressure Limits||0-100 psig|
|Max Flow Rate||10 feet|
|Analyzer Distance||Universal: 3000 feet
Loop Powered: 1000 feet
|Sensor Body Options||1″ NPT convertible
1 ¼” insertion
1 ½” or 2″ sanitary style
For pricing please call AFC International at 800-952-3293, 219-987-6825 or fax 219-987-6826 or email email@example.com.
Measurement and control of pH is important in a wide variety of industries. Water and wastewater, boiler feed water, food processing wash water, chemical plant make-up water and many other aqueous systems requires reliable pH monitoring. The Model Q46P pH monitor provides the combination of durability accuracy, and versatility required for virtually any pH monitoring or control application. The Model 46R provides the same reliable monitoring for Oxidation Reduction Potential (ORP) applications.
The Q46 platform represents the latest generation of monitoring and control systems. Control features have been expanded to include an optional 3rd analog output or an additional bank of low power relays. Digital communication options now include Profibus DP, Modbus RTU or Ethernet IP variations.
Accurate pH (or ORP) measurement requires that sensing surfaces be clean. The surface of a pH glass element covered with biological or chemical coatings will not provide reliable measurements and must be removed, either automatically of manually. Sensor fouling is rarely an issue in potable water or high purity water applications, but wastewater treatment, raw water monitoring and many industrial water monitoring applications demand regulator sensor cleaning. With operation and maintenance personnel often in short supply, sometimes simple yet critical cleaning functions can be overlooked until inaccurate measurements cause other problems.
The Q-Blast option provides the ideal answer for automatic pH or ORP sensor cleaning. Employing a unique “air-blast” cleaning method, sensors can be cleaned as often as necessary without operator attention. Pulses of pressurized air delivered through a nozzle at the tip of the sensor remove accumulated solids from critical surfaces, resulting in accurate and reliable measurements.
The Q-Blast Auto Clean assembly is housed in a NEMA 4X enclosure suitable for indoor or outdoor use. The system includes an integral compressor and air pulse control components, with a power supply for the entire air supply system incorporated into the design. A simple connection to the Q46P or Q46R monitor provides the sequencing for the system and allows the operator to select cleaning frequencies as often as once every hour to as little as once every 999 hours. To insure performance in extremely cold conditions, a thermostatically controlled heater is included in the assembly, allowing operation down to -40°C.
There is no single pH sensor that fits every application. Sensors designed for harsh environments do not necessarily work as well in high purity water. Understanding the difference between various sensor types will help you choose the best sensor for your application.
The most widely used pH sensors contain a hydrogen ion sensitive glass measuring electrode and a silver/silver chloride reference element. The reference element is sealed inside the sensor body filled with an electrolyte and electrically connected to the outside solution through one or more porous reference junctions. The glass electrode is in direct contact with the measured solution.
Conventional sensors are a good alternative for clean wate