4
1. Introduction
Fumigation of stored products as a pest control measure is widely practiced all over the world.
Phosphine, Methyl Bromide (MBr) and Sulfuryl Fluoride (SO
2
F
2
) are some of the commonly
used fumigants.
Phosphine (PH
3
)
in particular is a highly specific fumigant used to control number of pests in a
wide range of agricultural and horticultural crops and in wood products. Its primary application
is for quarantine treatment, soil fumigation and post harvest protection.
Fumigation is generally carried out by covering the commodities with a leak proof enclosure
and applying PH
3
of necessary concentration. Effective and scientifically carried out fumigation
procedure demands monitoring of the fumigation process during the entire period of fumigation.
For this application, UNIPHOS-250(PM) FumiSense Pro
is suitable.
This manual gives the full description of the UNIPHOS-250(PM) FumiSense Pro, its operation,
calibration, maintenance and the other relevant information.
1.1
Working Principle
The UNIPHOS-250(PM) FumiSense Pro uses an electrochemical sensor for the detection of
Phosphine. When sensor encounters a target gas, current is generated in proportion to the gas
concentration. This current is converted into a voltage signal; it is digitized and displayed on the
instrument’s OLED display. This being a microprocessor-based instrument, it can continuously
monitor the Phosphine gas concentration and can store this data in its memory, which can be
later downloaded on a computer.
The instrument is powered by a 7.4 V Li-ion rechargeable battery.
Summary of Contents for FumiSense Pro UNIPHOS-250
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