Q22PX0 pages

Replace unreliable sensors
& cut maintenance costs.

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 sensors emulate standard, non-amplified
combination sensors and 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 +1000 mV. 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.

System Features
Differential-Style Sensor: 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.

Integral Preamplifier: 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.

PEEK® or 316SS Sensor Body Construction: All sensor
housings are constructed of either PEEK®, a high
performance thermoplastic that provides outstanding
mechanical strength and chemical resistance, or 316
stainless steel.

Multiple Electrode Types: Sensor electrodes are userspecified to ensure measurement reliability and maximum
sensor lifetime. The type of pH electrode can be selected
for optimal performance. The metal ORP electrode is
either platinum or gold, depending on the process
chemicals.

Replaceable Sensor Saltbridge: 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.

ModelORP Sensors .......
Q22
Specialty pH &