Fumiscope
June 19, 2017
Fogging Machine
June 19, 2017MOONPHOS AIR SAMPLING PUMP (DETECTOR PUMP)
The MOONPHOS precision gas detector consist of two parts viz. i) the gas detector tubes and ii) air sampling pump is used to draw a precisely defined volume of sample air through the detector tube for determining the impurity gas concentrations in the air sample. This manual describes the air sampling pump and its operation for impurity gas measurement using detector tubes.
MOONPHOS DETECTOR TUBES
| Gas | Measuring Range ppm |
Volume of air drawn ml |
TLV v/v |
|---|---|---|---|
| PH3 | 5 - 100 50 - 1000 150 - 3000 |
50 50 50 |
0.3 0.3 0.3 |
MOONPHOS PERSONAL PHOSPHINE MONITORS
When continuous low level monitoring of Phosphine at work places is desired for occupational safety, where Phosphine is used, Moonphos pocket size Personal Monitor provides the answer.
Moonphos Phosphine Alert is an easy-to-use pocket size instrument with the following features:
- Continuous display of Phosphine Concentration in the range of 0.1-20 ppm.
- Built-in audible and visual alarms.
- User-settable high and low alarm set points.
This small battery-powered instrument is designed to be worn on the belt or in the chest pocket. It provides a continuous Phosphine concentration display in the immediate instrument area. When the concentration exceeds the alarm set points, audible and visual warnings indicate that an unacceptable Phosphine level is present
MOONPHOS PORTABLE PHOSPHINE MONITORS
For reliable on-the-spot measurement of Phosphine at work places or for monitoring of Phosphine concentration during furnigation, Moonphos portable Phosphine monitors provide the best choice
They are found in ranges as given below:
They can be provided various sampling adaptors
MOONPHOS DETECTOR TUBES
| Sensor | Electrochemical |
|---|---|
| Sampling method | Diffusion or Sample |
| Response time | Less than 30 seconds |
| Accuracy | Better thab +_10% of full scale |
| Power supply | DC operation using a 9V internal Ni-Cd battery |
| Battery life | 8-10 hour continuous |
| Operating temp | 0-40...C |
| Humidity | Below 90% relative humidity |
| Gas | Range | Resolution | TLV |
|---|---|---|---|
| Phosphine | 0-2000ppm | 1ppm | 0.3 |
| ppm | 0-20ppm | 0.1ppm |
FUMIGATION DOSIMETER
For ensuring adequate fumigation, it becomes necessary to monitor the Phosphine concentration during the entire period of furnigation for knowing the Phosphine does in ppm per hour. This involves many measurements. An alternate approach is, to use a dosimeter tube to determine the total dose at the end of the furnigation by the stain length, obtained on the tube. The furnigation dosimeter tube is just suitable for this purpose. The stain length on the tube reads the time taken to develop that length of stain, when exposed continuously to 1000ppm of Phosphine
| Phosphine dose | = |
time (read on the tube) x 1000ppm hours |
| and | ||
| Average Phosphine conc. during furnigation | = |
Phosphine dose
x
ppm |
| Gas | Dose (x103 ppm hrs) | TLV (ppm) |
|---|---|---|
| Phosphine | 1-200 | 0.3 |
| Phosphine | 0.1-20 | 0.3 |
MOONPHOS AIR SAMPLING PUMP (DETECTOR PUMP)
For entering a grain godown where furnigation is in progress in grain stacks, it is essential to ensure that Phosphine level araound the stacks is within acceptable limits, to meet the safety standards. Phosphine indicator strips do this job. It is the easiest means of detecting Phosphine is suspected areas.
They are paper strips imregnated with Phosphine-sensitive chemicals by a special process. They detect Phosphine by their change of colour.
| Concentration of Phosphine | Exposure Time | Colour Change |
|---|---|---|
| 0.3ppm | 30min. | yellow to light pink |
| 1.0ppm | 10min. | yellow to pink |
| 2.0ppm | 5min. | yellow to pink |
| 5.0ppm | 2min. | yellow to pink |
| 10ppm | 1min. | yellow to pink |
