The Gastec 13TP Carbon Disulfide Detector Tubes are designed for sensitive, low-level measurement of carbon disulfide (CS2) in air using a compatible automatic air sampling pump.

The 13TP provides a quantitative measuring range of 0.05 to 2.4 ppm, with a detection limit of 0.04 ppm under the specified sampling conditions. The tube uses a colorimetric reaction that produces a blue-to-yellowish green color change for visual determination of carbon disulfide concentration.

Each measurement requires two connected tubes. A box contains 10 tubes for a total of 5 tests.

Automatic Air Sampling Pump Required

IMPORTANT: Gastec 13TP Carbon Disulfide Detector Tubes require a compatible automatic air sampling pump capable of maintaining the specified flow rate and sampling time.

Compatible Pump: Gastec GSP-501FT Automatic Air Sampling Pump

Gastec specifically identifies the GSP-501FT for use with the 13TP.

The 13TP is an automatic air sampling pump detector tube and should not be treated as a standard hand-pump detector tube. Accurate measurement depends on using the correct tube configuration, flow rate, sampling volume, sampling time, and correction factor.

Do not substitute a standard manual Gastec detector tube pump for the required automatic sampling method.

Measurement & Sampling Specifications

Measurement Range	Sampling Rate	Sample Volume	Correction Factor	Sampling Time
0.05–1.0 ppm	100 mL/min	1,000 mL	1	10 Minutes
1.0–2.4 ppm	50 mL/min	500 mL	2.4	10 Minutes

For measurements from 0.05 to 1.0 ppm, set the automatic air sampling pump to 100 mL/min for 10 minutes, providing a 1,000 mL sample volume. Read the tube directly using a correction factor of 1.

For measurements from 1.0 to 2.4 ppm, use a sampling rate of 50 mL/min for 10 minutes, providing a 500 mL sample volume, and multiply the tube reading by the specified 2.4 correction factor.

Product Specifications

Brand: Gastec
Tube Type: Carbon Disulfide Detector Tube for Automatic Air Sampling Pump
Part Number: 13TP
Gas Measured: Carbon Disulfide (CS2)
Measurement Range: 0.05–2.4 ppm
Primary Measurement Range: 0.05–1.0 ppm
Extended Measurement Range: 1.0–2.4 ppm
Detection Limit: 0.04 ppm at 1,000 mL (minimum detectable concentration; not part of the quantitative measuring range)
Primary Sampling Rate: 100 mL/min
Extended-Range Sampling Rate: 50 mL/min
Primary Sample Volume: 1,000 mL
Extended-Range Sample Volume: 500 mL
Correction Factor: 1 or 2.4 depending on measuring range
Sampling Time: 10 Minutes
Color Change: Blue → Yellowish Green
Operating Temperature: 0–35°C (32–95°F), temperature correction not required
Operating Humidity: 0–90% RH, humidity correction not required
Relative Standard Deviation: 5% for 0.05–1.0 ppm
Quantity: 10 Tubes
Tests per Box: 5 Tests
Shelf Life: 24 Months
Pump Requirement: Compatible Automatic Air Sampling Pump Required

Two-Tube Measurement System

Unlike many Gastec detector tubes, the 13TP uses two tubes connected together during measurement.

After breaking the required ends of a fresh primary and secondary tube, the specified ends are connected using rubber tubing according to Gastec's instructions. The assembled detector tube system is then connected to the automatic air sampling pump with the arrow pointing toward the pump.

Because two tubes are required for each measurement, one box containing 10 tubes provides 5 complete tests.

Always follow the official Gastec 13TP instruction manual for proper tube orientation and connection before sampling.

Low-Level Carbon Disulfide Measurement

The Gastec 13TP is designed for low-level carbon disulfide (CS2) measurements in air.

Its quantitative measuring range extends from 0.05 to 2.4 ppm using two sampling configurations.

The lowest scale value of 0.05 ppm is represented by a scale line on the detector tube but is not numerically printed on the tube.

The 0.04 ppm detection limit represents the minimum concentration capable of producing a detectable reaction under the specified 1,000 mL sampling conditions. It is not part of the quantitative measuring range and should not be interpreted as a 0.04–2.4 ppm measurement range.

During sampling, the detecting layer changes from blue to yellowish green.

Common Applications

Gastec 13TP Carbon Disulfide Detector Tubes may be used for carbon disulfide measurement in air and applicable industrial and environmental atmospheric conditions, including:

• Industrial Hygiene & Occupational Air Monitoring

• Chemical Manufacturing & Processing

• Workplace Carbon Disulfide Exposure Monitoring

• Industrial Process Air Monitoring

• Environmental Atmospheric Monitoring

• Laboratory & Research Applications

• Leak & Release Investigations

• Industrial Safety & Maintenance

• Low-Level Carbon Disulfide Monitoring

Operating Conditions

The Gastec 13TP can be used from 0 to 35°C (32 to 95°F) without temperature correction.

The tube can be used from 0 to 90% relative humidity without humidity correction.

For atmospheric pressure differences, follow the pressure-correction procedure provided in the official Gastec 13TP instruction manual.

Possible Interferences

Certain coexisting substances may produce a positive interference or a similar yellowish-green color reaction.

Hydrogen Sulfide: At concentrations of 0.1 ppm or greater, positive interference may occur and hydrogen sulfide may itself produce a yellowish-green color.

Carbonyl Sulfide: At concentrations of 0.8 ppm or greater, positive interference may occur with a yellowish-green color.

Dimethyl Disulfide: At concentrations of 1.0 ppm or greater, positive interference may occur with a yellowish-green color.

Sulfur Dioxide: At concentrations of 0.1 ppm or greater, positive interference may occur with a yellowish-green color.

Gastec identifies methylene chloride at 50 ppm or less, acetone at 500 ppm or less, and methanol at 200 ppm or less as producing no interference under the manufacturer's specified test conditions.

Coexisting gases and vapors should always be considered when interpreting detector tube results.

Important

A compatible automatic air sampling pump is required for correct use of the Gastec 13TP Carbon Disulfide Detector Tubes.

Gastec specifically identifies the GSP-501FT Automatic Air Sampling Pump as suitable for the 13TP measurement procedure.

For the primary 0.05–1.0 ppm range, sampling is performed at 100 mL/min for 10 minutes. For the extended 1.0–2.4 ppm range, sampling is performed at 50 mL/min for 10 minutes and a 2.4 correction factor is applied.

Two detector tubes must be connected for each measurement. Therefore, 10 tubes provide 5 complete tests.

Do not use a standard manual detector tube pump in place of the required automatic sampling method.

Always follow Gastec's official 13TP instructions for tube connection, orientation, flow rate, sampling volume, sampling time, correction factors, environmental corrections, and interpretation of results.

Compatible Pump: Gastec GSP-501FT Automatic Air Sampling Pump

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