The sensing element of the instrument is an
electrochemical cell. The cell is a four-
electrode type, which contains a working and
an active auxiliary electrode. The signal
from the auxiliary electrode is used for
temperature compensation and to improve
the selectivity of the entire sensor. The
sensor response is linear with the
concentration of ozone in air.
Some representative examples of the
common compounds and the corresponding
signals they are shown below. Care needs to
be exercised when using this instrument in
the presence of large concentrations of
interfering gases. Contact the manufacturer
if difficulties are suspected with other gases,
or with other usage problems. In addition
variations in the baseline, as a result of
variations in concentrations of compounds
other than the target gas, during the course
of the measurement, can impact the reading.
The actual concentration of interfering gases
and the corresponding signals they give are
Real Time Continuous Monitoring
TWS, STEL, and Peak
Environmental Sensors’ Hydrogen Peroxide Meter is a portable instrument that
measures Hydrogen Peroxide concentration in a range of 0-20 ppm and a resolution
of 0.1 ppm.
The instrument makes it possible to monitor Hydrogen Peroxide vapor in air. The
instrument has a LCD display giving concentrations in ppm, a low battery indicator, and
an audible alarm that can be set at any level from 0-20 ppm.
With the touch of a button, the meter displays STEL (average of every 15 min.), TWA
(average of every hour) and Peak.
The Z-1500XP Hydrogen Peroxide meter stores all of the exposure points for up to
14,400 at 10 sec. interval in 5 logs (a log is created in the instrument’s internal memory
each time it is used). A log contains: date, time, number of exposure points. All of the
log files can be easily uploaded to PC using components available within the Microsoft
Windows Operating System or the terminal software included with the instrument.