GASTEC Instructions for
No. 137LL Chloroform Detector Tube
FOR SAFE OPERATION:
Carefully read this manual and the instruction manual of your Gastec Gas Sampling Pump.
WARNING:
1. Use only Gastec detector tubes in a Gastec Pump.
2. Do not interchange or use non-Gastec parts or components in Gastec’s detector tube
and pump system.
3. Using non-Gastec parts or components in Gastec’s detector tube and pump system or using
a non-Gastec detector tube with a Gastec pump or using a Gastec detector tube with a
non-Gastec pump may damage your detector tube and pump system, or may cause serious
injuries, or death to the end-user; It will also void all warranties; and guarantees regarding
performance and data accuracy.
CAUTION: If you do not observe the following precautions, you may suffer injuries
or damage the product.
1. When breaking the tube ends, keep away from eyes.
2. Do not touch the broken glass tubes, pieces and reagent with bare hand(s).
3. The sampling time represents the time necessary to draw the air sample through the tube.
The tube must be positioned in the desired sampling area for the entire sampling time or until
the flow finish indicator indicates the end of the sampling.
NOTES: For maintaining performance and reliability of the test results, observe the
following
1. Use Gastec Gas Sampling Pump together with Gastec Detector Tubes only for the purposes
specified in the instruction manual of the detector tube.
2. Use this tube under the temperature range of 0 - 35(32 – 95
3. Use this tube under the relative humidity range of 0 - 90%.
4. This tube may be interfered with by the coexisting gases. Please refer to the
“INTERFERENCES” below.
5. The shelf life and storage conditions of the tube are marked on the label of the box of tube.
6. Do not expose the tube to direct sunlight. Sunlight may discolor the reagent pale purple and
inaccurate measuring result may be given.
APPLICATION OF THE TUBE:
Use this tube for the detecting Chloroform in the air or in the industrial areas and for
determining the environmental atmospheric condition.
SPECIFICATION:
(Because of Gastec’s commitment to continued improvement, specifications are subject to
change without notice
o
F).
Humidity scrubber
©
Oxidising agent
0.3
1.0
1.5
2.0
2.5
3.0
3.5
Detecting layer
Measuring Range 0.3 – 4.5 ppm
Number of Pump Stroke 4
Correction Factor 1
Sampling Time 2 minutes per pump stroke
Detecting Limit 0.2 ppm (n=4)
Colour Change
Reaction Principle
CHCl
3 + I2O5 + H2S2O7 → Cl2
Cl
2 + 3,3’Dimethylnaphtidine → reaction product
White → Pale Purple
Coefficient of Variation: 10% (for 0.3 to 1.5 ppm), 5% (for 1.5 to 4.5 ppm)
©
4.0
4.5
ppm
137LL
**Shelf Life: Please refer to the Validity Date printed on the box of tube.
**Store the tube in the refrigerator to keep at 10
o
C (50oF) or below.
CORRECTION FOR TEMPERATURE, HUMIDITY AND PRESSURE:
Temperature:
Temperature oC
o
(
F)
Correct for temperature with the table below.
0
(32) 5 (41)
10
(50)
15
(59)
20
(68)
25
(77)
30
(86)
35
(95)
Correction Factor 2.3 1.8 1.4 1.1 1.0 1.0 1.0 1.0
Humidity:
Pressure:
No correction is required.
To correct for pressure, use the formula below.
Tube Reading (ppm
x 1013 (hPa)
)
Atmospheric Pressure (hPa)
MEASUREMENT PROCEDURE:
1. For checking the leakage of the pump, insert a freshly sealed detector tube into pump.
Follow the instructions provided with the pump operating manual.
2. Break the tips off a fresh primary tube and analyser tube using the tube tip breaker of the
pump.
3. Connect
4. Insert the analyser tube securely into pump inlet with arrow (
© marked ends with rubber tubing after breaking each end.
) on the tube pointing
toward the pump.
5. Make certain the pump handle is all the way in. Align guide marks on pump body with the
guide marks on the handle.
6. Pull the handle all the way out until it locks at one pump stroke (100 mL). Wait two minutes
and confirm the completion of the sampling. Repeat three more times.
7. Read concentration level at the interface where the stained reagent meets the unstained
reagent.
8. If necessary, multiply the reading by the correction factors of the pump strokes and
atmospheric pressure respectively.
INTERFERENCES:
Substance Concentration Interference Interference gas only
Chlorine
6ppm +
Pale purple
Bromine 4.5ppm No No
Iodine
1,1,1-trichloroethane
Trichlorethylene
4.5ppm No
+
+ Pale purple
No
Pale purple
The table of this interference gases primarily expresses the interference of each coexisting gas in
the gas concentration range, that is equivalent to the gas concentration. Therefore, the test result
may show positive result due to other substances not listed in the table. If more information is
needed, please contact us or our distributors in your territory.
DANGEROUS AND HAZARDOUS PROPERTIES:
Threshold Limit Value-Time Weighted Average by ACGIH (2009): 10 ppm
INSTRUCTIONS ON DISPOSAL:
Reagent of the tube does not use toxic substance. When disposing the tube regardless of
whether it has been used or not, follow the rules and regulations of the local government.
WARRANTY:
If you have any questions regarding gas detection and quality of the tubes, please
feel free to contact your Gastec representatives.
Manufacturer: Gastec Corporation IM00137LLE1
8-8-6 Fukayanaka, Ayase-City, 252-1195, Japan Printed in Japan
http://www.gastec.co.jp/
Telephone +81-467-79-3910 FAX +81-467-79-3979
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