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The improved Guardian single point fixed
instrument offers continuous monitoring and control of
Carbon Dioxide or Methane gas concentration levels. The
heart of the instrument is a proprietary dual wavelength
infrared sensor which provides reliable accuracy and long
term stability with low maintenance requirements. The
sensor is housed in a tough plastic enclosure,
which is rated at IP54 against the ingress of water or
dust.
For many years, Edinburgh Sensors has pioneered novel non-dispersive
infra-red dual wavelength sensors with a single optical
path and without moving parts. This ensures long term
stability, without the need for frequent re-calibration
and makes the sensor highly gas specific and insensitive
to other gases or water vapour. |
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The Guardian plus uses a robust infra-red
source, proven in the Gascard II sensor, to ensure long
lifetime and reduced susceptibility to shock. The
reliability is further enhanced by the elimination of all
moving parts from the sensor head.
Each Guardian plus is supplied fully tested and calibrated
to IS09002 standards.
Applications include Horticulture, Landfill, Combustion
Processes, Brewing, Food Processing, Personnel Protection,
Heating & Ventilation Control.
The Guardian
plus is easily maintained requiring only a few minutes per
year to replace the hydrophobic particle filter in the
inlet housing and a simple calibration procedure to check
the accuracy, typically once a year.
The Guardian plus includes an internal pump, liquid
crystal display and temperature correction. It also offers
a range of user-selectable bit-switches to control the
latching alarms and analogue output options. The input
power to the unit is user selectable to cover world-wide
voltage and frequency standards.
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