Ntron Gasenz Specifications

Gasenz

Ambient Oxygen Monitor

The Gasenz Oxygen Monitor is designed for the monitoring of oxygen decient
atmospheres in any work area where the risk of asphyxiation may occur due to the
presence of gases like nitrogen or carbon dioxide.

This compact and rugged % zirconia oxide or electrochemical sensor oxygen monitor is
perfectly suited for personnel protection in the gas generation industry and in hypoxic
re prevention systems.

FeaturesApplications

» Gas generation (oxygen / nitrogen)
» Pharmaceutical industries
» Process industries
» Food & Beverage industries
» Hypoxic Fire Prevention Systems

» Long life, low maintenance zirconia
or electrochemical sensor technology

» Measurement range: 0 to 25% O

» Compact ambient oxygen monitor

» Audio/ visual alarm indicator

» LCD + 4 button multifunction keypad

2

» Simple Installation (only power lead

required)

Issue No: GASENZ_01_V1_EN_0819

Gasenz

Ambient Oxygen Monitor

Proven sensor technology

With a choice of either zirconia or
electrochemical sensor technology the
Gasenz oers reliability, accuracy and
exibility. Both technologies have a broad
measurement capability allowing the user
to measure from selected ranges from 1ppm
to 96% oxygen.

Zirconia sensor

The Ntron zirconia oxygen sensor is a non­depleting zirconia solid electrolyte sensor.
A small capillary on the sensor controls
the diusion of oxygen into the sensor.
When heated to over 400°C oxygen is
electronically reduced causing current ow
through the zirconia electrolyte. Zirconium­oxide allows the movement of oxygen
ions through the substrate from a high to
a low concentration. The measurement of
oxygen is determined by the current owing
through the electrodes. The zirconia sensor
has an unlimited shelf life without the loss
of calibration and has an expected life in
excess of 5 years. The zirconia sensor is
not position sensitive and has low cross
sensitivity to other gases and does not dry
out.

Low maintenance and cost of ownership

Due to the highly stable nature of the
sensor, a calibration interval of once per
year is required, allowing for signicant cost
savings. The construction of our zirconia
oxygen sensor means that only 100 mL/
min of sample gas is required, providing
application exibility and further potential
cost savings.

Electrochemical sensor

The key elements of the electrochemical
sensors are a membrane, cathode, anode,
electrolyte and measurement circuit. The
sensing membrane (covering the cathode)
is made of PTFE and is mounted over a
metal perforated electrode. The space
between the membrane and the electrode
is lled either with an aqueous alkaline or
an acid electrolyte. In normal operation,
all portions of the anode and cathode are
immersed in the electrolyte. As oxygen
diuses through the membrane into the
electrolyte it causes a reaction between
the cathode and anode generating an EMF.
This current is proportional to the amount
of oxygen present in the sample gas. In the
absence of oxygen there is no output from
the electrochemical sensor, meaning only
one calibration is required.

Sensor contruction

The main body of the sensor is fabricated
from high density PVDF. The supporting ring
at the face of the sensor is constructed of
stainless steel. This results in an oxygen
sensor that is chemically resistant to most
sampling atmospheres and can be used with
trace solvents and hydrocarbons present in
the sample gas, unlike zirconia (due to the
high temperature of the sensor).

Installation 󰍍exibility

Designed for the ambient detection of
low Oxygen concentration with ease of
installation.

Fast response time

Zirconia oxygen sensors respond very
quickly to oxygen concentrations in both
directions with a T90 of less than 10 seconds
within a set range.

Application Setup

4-20mA & Relay

interface cabling