Toxalert Tox-45-xx Series - Manual

TOXALERT INTERNATIONAL, INC.
P.O. BOX 159, MOUND, MINNESOTA 55364 * (952) 472‐4541 * FAX (952) 472‐4960
Visit our website at www.toxalert.com
TOX45-03 Oxygen, O
2
TOX45-04 Carbon Monoxide, CO
TOX45-05 Hydrogen Sulfide, H
2
S
TOX45-06 Chlorine, Cl
2
TOX45-08 Chlorine Dioxide, ClO
2
TOX45-10 Sulfur Dioxide, SO
2
TOX45-12 Nitrogen Dioxide, NO
2
TOX45-25 Ammonia, NH
3
TOX45-26 Hydrogen Fluoride, HF
Model TOX45 Series Sensors
The Model TOX45-XX Series Toxic Gas 2-wire gas
sensor modules allow easy direct connection to
Toxalert Tox4 and ToxControl Controllers and
many DCS, PLC and other control devices. The
sensor module is best in class for ease of installation,
reliable operation, ease of use, and, with 180 day
calibration cycle, low cost of operation.
The TOX45-XX Gas Sensor Module utilizes the electro-
chemical cell to monitor for the specified gas over various
gas specific ranges. This compact Module requires minimal
maintenance. Internal continuous self-diagnostics will
automatically indicate any fault problems. The TOX45-XX
is best in class providing all the built-in features desired
by instrumentation and safety professionals, including:

Industry’s longest calibration interval of 180 days

2-wire loop powered for easy installation and
direct interface to common PLC and DCS as
well as Toxalert controllers.

Integral scrolling LCD 2-line, 16 character display
 Non-intrusive
one-person calibration

aluminum or 316 Stainless Steel enclosure

4-20 mA output

Long sensor life

Robust RFI immunity
 Ability to rotate face plate to enable the enclosure
to be mounted in any orientation.
How It Works
Electrochemical sensors are fuel cell-like devices con-
sisting of an anode, cathode, and electrolyte. The com-
ponents of the cell are selected so a subject gas, al-
lowed to diffuse into the cell, will cause a chemical re-
action and generate a current. The cells are diffusion
limited so the rate the gas enters the cell is solely de-
pendent on the gas concentration. The current generated
is proportional to the rate of consumption of the subject
gas in the cell.
TOXALERT’S electrochemical sensors provide improved
reliability by allowing the gas to diffuse into the sensor
through a capillary port, rather than diffusing through
membranes. The result is an extremely stable sensor
with very low temperature and pressure coefficients and
the capability to monitor gas as ppm (toxics).
TOXALERT TM
Toxic Gas Sensor Module
2 – Wire Series
Model TOX45‐xx