GASTEC 13TP Carbon Disulphide Detector Tube Instructions
- June 9, 2024
- GASTEC
Table of Contents
GASTEC 13TP Carbon Disulphide Detector Tube
FOR SAFE OPERATION
Carefully read this manual and the instruction manual of your Air Sampling Pump before use.
CAUTION : If you do not observe the following precautions, you may suffer injuries or damage the product.
- When breaking the tube ends, keep away from the eyes.
- Do not touch the broken glass tubes, pieces or reagent with bare hands
NOTES : For maintaining performance and reliability of the test results, observe the following.
- Recommend to use Gastec Gas Sampling device Model GSP-300FT-2 or GSP-501FT together with Gastec Detector Tubes only for the purposes specified in the instruction manual of the detector tube.
- Use this tube within the temperature range of 0 – 35℃ (32 – 95℉).
- Use this tube within the relative humidity range of 0 – 90%.
- This tube may be interfered with by the coexisting gases. Please refer to the table “INTERFERENCES” below.
- Shelf life and storage condition of the tubes are marked on the label of the box of tubes.
APPLICATION OF THE TUBE
Use this tube for the measurement of Carbon disulphide in air or in the industrial areas and environmental atmospheric condition
SPECIFICATION
(Because of Gastec’s commitment to continued improvement, specifications are subject to change without notice.)
The Minimum Scale (0.05ppm) is not printed on the tube and is indicated as a Scale Line only.
| Measuring Range | (0.05) – 1.0 ppm | 1.0 – 2.4 ppm |
|---|---|---|
| Sampling Rate | 100 mL/min | 50 mL/min |
| Correction Factor | 1 | 2.4 |
| Sampling Time | 10 min | 10 min |
| Detecting Limit | 0.04 ppm (1000 mL) | |
| Colour Change | Blue → Yellowish green | |
| Reaction Principle | CS2 + I2O5 + H2S2O7 → SO2 + CO2 |
SO2 + Base → Chloride
Coefficient of Variation: 5% (for 0.05 to 1.0 ppm)
- Shelf Life : Please refer to the validity date printed on the box of tubes.
- Store the tubes in a cool and dark place.
- Temperature : No correction is required between 0 – 35°C (32 – 95°F).
- Humidity : No correction is required between 0 – 90% R.H.
- Pressure : To correct for pressure, use the formula below
- Tube Reading ＊ (ppm) × 1013 (hPa)
MEASUREMENT PROCEDURE
If the Automatic Air Sampling Pump Model GSP-300FT-2 or GSP-501FT is used.
- Prior to operation please confirm if black colour inlet rubber tube holder is equipped with the pump.
- Break tips off a fresh primary tube and secondary tube by bending each tube end in the tube tip breaker of the pump.
- Connect © marked ends with rubber tubing after breaking each end.
- Insert the tube into the pump inlet with arrow ( ) on the tube pointing toward pump.
- Set the flow rate to 100 mL/min and timer to 10 minutes at the pump. Press the start switch of the pump to start the sampling.
- After sampling is completed, remove the detector tube from the pump.
- Read the concentration level at the interface where the stained reagent meets the unstained reagent. For measurements higher than 1.0 ppm, prepare a fresh tube. Set the flow metre at 50 mL/min and timer to “10 minutes” of the pump and start the sampling again.
- If necessary, multiply the readings by the correction factors of sampling rate and atmospheric pressure respectively.
INTERFERENCES
Substance| Concentration| Interference| Change colour by
itself to
---|---|---|---
Hydrogen sulphide| ≧ 0.1 ppm| ＋| Yellowish green (≧ 0.1ppm)
Carbonyl sulphide| ≧ 0.8 ppm| ＋| Yellowish green (≧ 0.8ppm)
Dimethyl disulphide| ≧ 1.0 ppm| ＋| Yellowish green (≧ 1.0ppm)
Methylene Chloride| ≦ 50 ppm| No| No discolouration
Acetone| ≦ 500 ppm| No| No discolouration
Methanol| ≦ 200 ppm| No| No discolouration
Sulphur dioxide| ≧ 0.1 ppm| ＋| Yellowish green (≧ 0.1ppm)
This table of 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 give a positive result from other substances not listed in the table. If more information is needed, please contact us or Gastec representatives.
WHEN MEASURING OVER AN INTERVAL OF 15 MINUTES :
This Detector Tube can measure continuously for 15 minutes, so it is possible
to measure the average concentration for 15 minutes in one measurement. In the
case where this Detector Tube is used to measure over 15 minutes, follow the
MEASUREMENT PROCEDURE and use values from the table below for set Sampling
Rate, Sampling Time, and Correction Factor
| Measuring Range | (0.033) – 0.66 ppm | 0.66 – 1.59 ppm |
|---|---|---|
| Sampling Rate | 100 mL/min | 50 mL/min |
| Correction Factor | 0.66 | 1.59 |
| Sampling Time | 15 min | 15 min |
DANGEROUS AND HAZARDOUS PROPERTIES :
Threshold Limit Value-Time Weighted Average by ACGIH (2022): 1 ppm
INSTRUCTIONS ON DISPOSAL :
The reagent of the pretreatment tube uses a small amount of hexavalent chromium. The reagent of the detector 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 your local government.
WARRANTY
If you have any questions regarding gas detection and quality of the tubes, please feel free to contact us or your Gastec representatives.
Manufacturer : Gastec Corporation
8-8-6 Fukayanaka, Ayase-City, Kanagawa 252-1195, Japan
https://www.gastec.co.jp/ Telephone +81-467-79-3910 Facsimile
+81-467-79-3979