The Gastec 183TP N,N-Dimethylformamide Detector Tubes are designed for quantitative measurement of N,N-dimethylformamide (DMF / HCON(CH3)2) in workplace, industrial, and environmental air using a compatible automatic air sampling pump.
The 183TP provides an overall quantitative measuring range of 0.5 to 30 ppm using two sampling rates. The primary range of 0.5 to 15 ppm is measured at 100 mL/min, while concentrations from 15 to 30 ppm can be measured at 50 mL/min using a ×2 correction factor.
The detector tube produces a pink-to-yellow color change and has a detection limit of 0.1 ppm under the specified 1,000 mL sampling conditions.
Scale Note: The minimum scale value of 0.5 ppm is represented by a scale line on the detector tube, but the number “0.5” itself is not printed on the tube.
Each box contains 10 detector tubes for 10 individual tests.
Automatic Air Sampling Pump Required
IMPORTANT: Gastec 183TP N,N-Dimethylformamide 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 Gastec 183TP 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, prepare a fresh detector tube and sample at 50 mL/min for 10 minutes, then multiply the detector tube reading by the specified ×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 |
|---|---|---|---|---|
| 0.5–15 ppm | 100 mL/min | 1,000 mL | 1 | 10 Minutes |
| 15–30 ppm | 50 mL/min | 500 mL | 2 | 10 Minutes |
For measurements from 0.5 to 15 ppm, sample at 100 mL/min for 10 minutes, producing a total sample volume of 1,000 mL.
For measurements above 15 ppm and up to 30 ppm, prepare a fresh detector tube and sample at 50 mL/min for 10 minutes, producing a total sample volume of 500 mL. Multiply the detector tube reading by 2.
Product Specifications
Brand: Gastec
Tube Type: N,N-Dimethylformamide Detector Tube for Automatic Air Sampling Pump
Part Number: 183TP
Gas/Vapor Measured: N,N-Dimethylformamide (DMF)
Chemical Formula: HCON(CH3)2
Measurement Range: 0.5–30 ppm
Primary Measurement Range: 0.5–15 ppm
Extended Measurement Range: 15–30 ppm
Detection Limit: 0.1 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 depending on measurement range
Sampling Time: 10 Minutes
Color Change: Pink → Yellow
Operating Temperature: 5–40°C (41–104°F), temperature correction required
Operating Humidity: 20–90% RH, humidity correction not required under the manufacturer-specified conditions
Relative Standard Deviation: 15% for 0.5–4 ppm; 5% for 4–15 ppm
Quantity: 10 Tubes
Tests per Box: 10 Tests
Shelf Life: 24 Months
Pump Requirement: Gastec GSP-501FT or Compatible Automatic Air Sampling Pump
N,N-Dimethylformamide (DMF) Measurement
The Gastec 183TP provides quantitative measurement of N,N-dimethylformamide concentrations from 0.5 to 30 ppm.
The 0.1 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 0.1–30 ppm measuring range.
N,N-Dimethylformamide reacts with the detector tube reagent to produce amines, which turn the indicator from pink to yellow.
Common Applications
Gastec 183TP N,N-Dimethylformamide Detector Tubes may be used for applicable DMF air-monitoring applications including:
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Industrial Hygiene & Occupational Exposure Monitoring
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Workplace DMF Monitoring
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Chemical Manufacturing & Processing
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Solvent Use & Handling Areas
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Pharmaceutical Manufacturing
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Coating, Resin & Polymer Processing
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Laboratory & Research Applications
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Industrial Process Air Monitoring
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Environmental Atmospheric Monitoring
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Leak & Release Investigations
Temperature & Environmental Correction
The Gastec 183TP is designed for use between 5 and 40°C (41–104°F) and temperature correction is required.
For tube temperatures between 10 and 40°C, Gastec provides the following correction factors:
| Temperature | Correction Factor |
|---|---|
| 10°C (50°F) | 1.4 |
| 15°C (59°F) | 1.2 |
| 20°C (68°F) | 1.0 |
| 25°C (77°F) | 0.90 |
| 30°C (86°F) | 0.86 |
| 35°C (95°F) | 0.84 |
| 40°C (104°F) | 0.82 |
Measurements performed at 5–9°C require the specific low-temperature correction procedure provided in the official Gastec 183TP instruction manual.
Atmospheric-pressure correction may also be required according to Gastec's official procedure.
Always consult the current 183TP instruction manual when applying environmental corrections.
Possible Interferences
Certain coexisting substances may affect Gastec 183TP measurements.
Ammonia: At concentrations of 0.1 ppm or greater, may produce a positive interference and independently produce a yellow color.
Amines: At concentrations of 0.1 ppm or greater, may produce a positive interference and independently produce a yellow color.
N,N-Dimethylhydrazine: At concentrations of 0.1 ppm or greater, may produce a positive interference and independently produce a yellow color.
Toluene: At concentrations of 170 ppm or less, Gastec identifies no interference and no independent color change.
Carbon Dioxide: At concentrations of 1,500 ppm or greater, may produce a negative interference without independently changing color.
Chlorine: At concentrations of 1,000 ppm or greater, may produce a negative interference. Gastec indicates chlorine can decolorize the indicator at 1.0%.
Coexisting gases and vapors should always be considered when interpreting detector tube measurements.
N,N-Dimethylacetamide Measurement
The Gastec 183TP can also be used to measure N,N-dimethylacetamide under Gastec's specified conditions.
N,N-Dimethylacetamide Measuring Range: 3–57.5 ppm
Sampling: 100 mL/min × 10 Minutes
Correction: Read using the applicable correction scale according to Gastec's current instructions.
Always consult the official 183TP instruction manual when using this detector tube for N,N-dimethylacetamide rather than its primary N,N-dimethylformamide application.
Important
A Gastec GSP-501FT or compatible automatic air sampling pump is required for correct use of the Gastec 183TP N,N-Dimethylformamide Detector Tubes.
Purchase the Correct Automatic Sampling Pump:
Gastec GSP-501FT Automatic Air Sampling Pump
For the primary 0.5–15 ppm range, sample at 100 mL/min for 10 minutes, producing a total sample volume of 1,000 mL.
For the extended 15–30 ppm range, prepare a fresh detector tube and sample at 50 mL/min for 10 minutes, producing a total sample volume of 500 mL. Multiply the reading by the ×2 correction factor.
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.
Always follow Gastec's official instructions for sampling rate, sampling time, temperature correction, atmospheric-pressure correction, environmental conditions, possible interferences, and interpretation of results.
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