MOON GAS MONITORING DEVICES

    

MOONPHOS 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
   

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            ppm
period of furnigation

   

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
   
 

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MOON TRADING SDN BHD (571233-T)
33, 35, 37, 39, JALAN INDAH 2/18,
TAMAN UNIVERSITI INDAH,
43300 SERI KEMBANGAN,
SELANGOR, MALAYSIA.

Tel/Fax:
603-8941 0329 / 603-8941 6329   Email: moon@moontrading.com


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