The Gastec 151TP Acetone Detector Tubes are designed for quantitative measurement of acetone (CH3COCH3) in air using a compatible automatic air sampling pump.

The 151TP provides a measuring range of 25 to 800 ppm, with a detection limit of 10 ppm under the specified sampling conditions. The detector tube produces a yellow-to-red color change for visual determination of acetone concentration.

IMPORTANT: The minimum scale value of 25 ppm is represented by a scale line on the detector tube, but the number “25” itself is not printed on the tube.

Each box contains 10 detector tubes for 10 individual tests.

Automatic Air Sampling Pump Required

IMPORTANT: Gastec 151TP Acetone Detector Tubes require a compatible automatic air sampling pump capable of maintaining a continuous 100 mL/min sampling rate.

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

The Gastec 151TP is an automatic air sampling pump detector tube and should not be treated as a standard hand-pump detector tube.

Accurate measurement requires drawing 1,000 mL of air through the detector tube at 100 mL/min for 10 minutes.

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
25–800 ppm	100 mL/min	1,000 mL	1	10 Minutes

The Gastec 151TP requires continuous sampling at 100 mL/min for 10 minutes, producing a total sample volume of 1,000 mL.

The correction factor is 1 under the specified sampling conditions. Temperature and atmospheric-pressure corrections should be applied when required.

Product Specifications

Brand: Gastec
Tube Type: Acetone Detector Tube for Automatic Air Sampling Pump
Part Number: 151TP
Gas/Vapor Measured: Acetone
Chemical Formula: CH3COCH3
Measurement Range: 25–800 ppm
Detection Limit: 10 ppm at 1,000 mL (minimum detectable concentration; not part of the quantitative measuring range)
Sampling Rate: 100 mL/min
Sample Volume: 1,000 mL
Correction Factor: 1
Sampling Time: 10 Minutes
Color Change: Yellow → Red
Operating Temperature: 0–35°C (32–95°F), temperature correction required
Operating Humidity: 0–90% RH, humidity correction not required
Relative Standard Deviation: 10% for 25–300 ppm; 5% for 300–800 ppm
Quantity: 10 Tubes
Tests per Box: 10 Tests
Shelf Life: 27 Months, refrigerated
Pump Requirement: Gastec GSP-501FT or Compatible Automatic Air Sampling Pump

Acetone Measurement

The Gastec 151TP provides quantitative measurement of acetone concentrations from 25 to 800 ppm.

The 10 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 10–800 ppm measuring range.

Scale Note: The minimum measuring value of 25 ppm is indicated by a scale line on the detector tube, but “25” is not numerically printed on the tube.

During sampling, the detecting layer changes from yellow to red.

Common Applications

Gastec 151TP Acetone Detector Tubes may be used for applicable acetone vapor monitoring applications including:

• Industrial Hygiene & Occupational Exposure Monitoring

• Workplace Acetone Monitoring

• Solvent Use & Handling Areas

• Paint, Coating & Manufacturing Operations

• Chemical Manufacturing & Processing

• Cleaning & Degreasing Operations

• Laboratory & Research Applications

• Industrial Process Air Monitoring

• Leak & Release Investigations

• Acetone Vapor Monitoring

Temperature Correction

The Gastec 151TP requires temperature correction when measurements are performed within its specified 0–35°C (32–95°F) operating range.

Gastec specifies the following temperature correction factors:

Temperature	Correction Factor
0°C (32°F)	1.3
5°C (41°F)	1.2
10°C (50°F)	1.1
15–20°C (59–68°F)	1.0
25°C (77°F)	0.9
30°C (86°F)	0.8
35°C (95°F)	0.7

Multiply the detector tube reading by the appropriate temperature correction factor when required.

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

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

Possible Interferences

Certain coexisting substances may affect Gastec 151TP measurements.

Alcohols & Esters: May produce a positive interference, although these substances are listed as producing no independent color change.

Aldehydes & Ketones: May produce a positive interference and may independently produce a red color.

Aromatic Hydrocarbons: Gastec identifies no interference and no independent color change under the manufacturer's stated test conditions.

Other substances not listed by Gastec may potentially affect detector tube results. Coexisting gases and vapors should always be considered when interpreting measurements.

Storage

The Gastec 151TP has a manufacturer-specified 27-month shelf life when stored in the refrigerator.

Always follow the storage instructions and expiration information printed on the detector tube box.

Important

A Gastec GSP-501FT or compatible automatic air sampling pump is required for correct use of the Gastec 151TP Acetone Detector Tubes.

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

Sampling is performed at 100 mL/min for 10 minutes, producing a total sample volume of 1,000 mL.

Each detector tube provides one test. One box contains 10 tubes for 10 complete tests.

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

Temperature and atmospheric-pressure corrections should be applied when required according to Gastec's official instructions.

Always follow Gastec's official instructions for tube preparation and orientation, sampling rate, sample volume, sampling time, environmental corrections, possible interferences, storage, and interpretation of results.

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