Phosphine dosimeter tubes measure the total dose of phosphine during the entire period of fumigation of goods. Also known as long term detector tubes, with no need for sample draw pump, this a cost-effective method for measuring the phosphine concentration.
Phosphine is widely used as fumigants for disinfection of agricultural commodities such as cereal grains, spices, cotton or any other stored products. Fumigation is carried out by placing a calculated amount of phosphine in the fumigation enclosure. The phosphine concentration starts to build up from zero and attains a maximum and as the PH3 generation stops, the absorption of phospine in the grain gradually brings down the phosphine concentration.
For an accurate fumigation, a certain PH3 concentration profile should be maintained during the entire fumigation period. The insect mortality is governed by “fumigation dose” – which is defined as the concentration-time product expressed in ppm/hr. In order to determine the accuracy of fumigation, it is necessary to measure the total PH3 dose received by the commodity.
Our Uniphos dosimeter tubes present a unique method to determine the PH3 concentration-time product (dose). The total dose is measured by exposing the dosimeter tube during the entire period of fumigation. This is an ideal method as it saves time and money by measuring the total dose received by the commodity during the entire course of fumigation with a single measurement. The length of the stain produced on the dosimeter is calibrated to read directly the phosphine dose received. It ranges from (1-20) X 103 ppm hrs and (1-200) X 103 ppm hrs.
For further information, please e-mail us.
Vehicle exhausts presents an interesting challenge when selecting gas detection for parking garages and tunnels.
CO and NO2 are the most abundant airborne contaminants present in the parking garages and tunnels. The operation of gasoline operated vehicles presents the most serious concern of carbon monoxide emission. Carbon monoxide poisoning is a form of asphyxiation. Carbon monoxide lowers the oxygen carrying capacity of blood and interferes with necessary gaseous exchange functions. • Human health effects can vary significantly based on overall state of health, sex, age and weight. The other major concern is the emission of NO2 from diesel engines. NO2 is an air pollutant that can have significant impacts on human health. By monitoring the concentration of these fumes and ventilating based on their concentration, a safe environment can be ensured.
Most building codes indicate that ventilation for parking structures should be continuous, 24/7, However, by ventilating only when sensors indicate a requirement, energy can be conserved both from reduced fan operation, and also from any related heating or cooling costs.
Several factors must be taken into consideration when determining the correct system, few listed below:
- Size of the space to be monitored with the numbers of cars running and length of their operation
- Emission rate of vehicle
- Acceptable contaminant level within a given facility
- Sensor placement
- Number of zones
- Output requirement
- Types of fuels being used
- Desired sequence of operation
Whether as a classic CO warning system or a gas warning system combined with NO2, our gas warning system protect human health in these areas. These sensors are manufactured according to the regulations for parking garages and to different directives offering advantages as:
- More Safety
- Exchangeable sensor X-change : significantly lower maintenance costs
- Overall reduced costs
- Integration to BMS (Bacnet, Modbus, LON)
For a permanently safe and convenient gas detection for parking garages and tunnels, please contact us.
Each year millions of dollars are wasted due to fire and explosions in industries such as coal mines, power plants, oil & gas, pharma, food and grain industries. This happens as the fire is detected too late. During an explosion the fire goes through various stages as:
- 1st stage : Gas radicals (host of gases are generated depending on the application)
- 2nd stage: Non-visible smoke
- 3rd stage : Visible smoke
- 4th stage : Red Hot
- 5th Stage : Flame
Process industries so far have been using flame and smoke sensors for fire detection. However,flame detection is not a solution as by the time flame is detected – it is too late. Same is with smoke detectors – it is too late.
There is no visible smoke, no flame and very little heat during the first stage. Gaseous radicals are generated depending on the application. Very early fire and smoke monitoring system picks up this gas radicals and generates alarm. Detection by our VEFSA monitors 1st stage of fire / smoke, to give earliest sign of fire and smoke, even before invisible smoke occurs.
- Better safety for plant and personnel
- Reduced insurance premiums
- Reduced down time
- Prevention of loss of resources
- Save time and money
Also, while conventional smoke and fire detectors are affected by dust, moisture due to optional detection method, VEFSA give you uninterrupted, continuous and true alarm because of unmatched and advance detection technology and microprocessor based value processing. Our PolyGard VEFSA – Very Early Fire Warning and Safety Alarm works on monitoring the products of combustion (CO) and generating alarm through a control system so the timely corrective action can be initiated.
Don’t wait till the damage is done. Install our VEFSA that addresses the need for early fire detection and offers a very early warning of potential fire, avoiding any further damage. For further information, please e-mail us.
Our Uniphos range of fumigation gas monitors are designed and developed taking into account the specific needs of the fumigators and their different applications. With a full range of detection devices for Phosphine, Methyl Bromide, Sulfuryl Fluoride and other fumigants, we are the one point source for fumigation monitoring devices.
Electronic fumigation gas monitors provide continuous read-out of gas concentrations with digital displays. Handheld monitors are designed to be carried for personal protection or leak detection. Portable instruments are designed to be placed on a bench-top for area monitoring using built-in sampling pump.
Owing to the superior features, ease of operation, better accuracy and superior functionality of their instruments, Gas Alarm systems has been recognized as a proven supplier of fumigation gas monitoring systems.
- Uniphos 350M Lo Gas Monitor
- Uniphos Fumisense Pro with inbuilt pump
Methyl Bromide Monitors:
- Uniphos 351 M Lo Gas Monitor
- Uniphos Fumisense Pro with inbuilt pump
Sulfuryl Fluoride Monitors
- Uniphos Fumispec – Lo
- Uniphos Fumispec – Hi
Multi Gas Monitor:
- Fumisense Dual Gas Monitor for PH3 and MBr
Automatic Gas Monitor:
- FUMITRACK for Phosphine as well as Methyl Bromide
Please contact us to find out more