The Gastec 132TP Trichloroethylene Detector Tubes are designed for measurement of trichloroethylene (Cl2C) in air using a compatible automatic air sampling pump.

The 132TP provides a quantitative measuring range of 1 to 33 ppm, with a detection limit of 0.2 ppm under the specified sampling conditions. The detector system produces a yellow-to-reddish-purple color change for visual determination of trichloroethylene concentration.

IMPORTANT: The Gastec 132TP uses two connected tubes for each measurement. Each box contains 10 tubes for a total of 5 tests.

Automatic Air Sampling Pump Required

IMPORTANT: Gastec 132TP Trichloroethylene Detector Tubes require a compatible automatic air sampling pump capable of maintaining the specified continuous sampling rates.

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

The 132TP is an automatic air sampling pump detector tube and should not be treated as a standard hand-pump detector tube.

For the primary measuring range, sampling is performed at 100 mL/min for 10 minutes. For concentrations above 15 ppm, a fresh tube set is sampled at 50 mL/min for 10 minutes, followed by application of the specified ×2.2 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
1–15 ppm	100 mL/min	1,000 mL	1	10 Minutes
15–33 ppm	50 mL/min	500 mL	2.2	10 Minutes

For measurements from 1 to 15 ppm, sample at 100 mL/min for 10 minutes, providing a total sample volume of 1,000 mL.

For measurements above 15 ppm and up to 33 ppm, prepare a fresh tube set and sample at 50 mL/min for 10 minutes, providing a total sample volume of 500 mL. Multiply the detector tube reading by the specified 2.2 correction factor.

Product Specifications

Brand: Gastec
Tube Type: Trichloroethylene Detector Tube for Automatic Air Sampling Pump
Part Number: 132TP
Gas/Vapor Measured: Trichloroethylene
Chemical Formula: Cl2C
Measurement Range: 1–33 ppm
Primary Measurement Range: 1–15 ppm
Extended Measurement Range: 15–33 ppm
Detection Limit: 0.2 ppm at 1,000 mL (minimum detectable concentration; not part of the quantitative measuring range)
Primary Sampling Rate: 100 mL/min
Extended Sampling Rate: 50 mL/min
Primary Sample Volume: 1,000 mL
Extended Sample Volume: 500 mL
Correction Factor: 1 or 2.2 depending on measurement range
Sampling Time: 10 Minutes
Color Change: Yellow → Reddish Purple
Operating Temperature: 0–40°C (32–104°F), temperature correction required
Operating Humidity: 0–90% RH, humidity correction not required
Relative Standard Deviation: 5% for 1–15 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

The Gastec 132TP requires two tubes to be connected together for each measurement.

Break the required ends of the primary and analyzer tubes and connect the tubes using the supplied rubber tubing according to Gastec's instructions. The analyzer tube is then inserted securely into the automatic air sampling pump with the arrow pointing toward the pump.

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

Always follow the official Gastec 132TP instruction manual for correct tube preparation, connection, orientation, and sampling procedure.

Trichloroethylene Measurement

The Gastec 132TP provides quantitative measurement of trichloroethylene concentrations from 1 to 33 ppm.

The 0.2 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 0.2–33 ppm measurement range.

During sampling, trichloroethylene reacts with the oxidizing agent to form intermediate products, resulting in a visible yellow-to-reddish-purple color change.

Common Applications

Gastec 132TP Trichloroethylene Detector Tubes may be used for applicable TCE air-monitoring applications including:

• Industrial Hygiene & Occupational Exposure Monitoring

• Workplace Trichloroethylene Monitoring

• Degreasing & Solvent Operations

• Metal Cleaning & Manufacturing

• Chemical Manufacturing & Processing

• Industrial Process Air Monitoring

• Solvent Vapor Monitoring

• Leak & Release Investigations

• Laboratory & Research Applications

• Environmental Atmospheric Monitoring

Temperature Correction

The Gastec 132TP is designed for use between 0 and 40°C (32–104°F) and temperature correction is required.

Gastec specifies the following temperature correction factors:

Temperature	Correction Factor
0°C (32°F)	1.37
5°C (41°F)	1.23
10°C (50°F)	1.13
15°C (59°F)	1.05
20°C (68°F)	1.00
25°C (77°F)	0.83
30°C (86°F)	0.76
35°C (95°F)	0.73
40°C (104°F)	0.68

Apply the appropriate temperature correction factor according to Gastec's official instructions.

No humidity correction is required within the specified 0–90% RH operating range.

Atmospheric-pressure correction may also be required according to Gastec's official measurement procedure.

Possible Interferences

Certain coexisting substances may affect Gastec 132TP measurements.

Hydrogen Chloride: At concentrations of 1/10 or greater relative to the trichloroethylene concentration, may produce a positive interference and reddish-purple color.

Chlorine: At concentrations of 1/40 or greater, may produce a negative interference and white color.

Vinyl Chloride: At concentrations of 1/10 or greater, may produce a positive interference and reddish-purple color.

1,2-Dichloroethylene: At concentrations of 1/10 or greater, may produce a positive interference and reddish-purple color.

Tetrachloroethylene: At concentrations of 1/20 or greater, may produce a positive interference and reddish-purple color.

1,1,1-Trichloroethane: At concentrations of 400 ppm or less, Gastec identifies no interference and no independent color change.

Toluene & Xylene: At concentrations of 10 ppm or greater, may produce a negative interference without independently changing color.

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

Important

A compatible automatic air sampling pump is required for correct use of the Gastec 132TP Trichloroethylene Detector Tubes.

Purchase the Automatic Sampling Pump:
Gastec GSP-501FT Automatic Air Sampling Pump

For the primary 1–15 ppm range, sampling is performed at **100 mL/min