The Gastec 8TP Chlorine Detector Tubes are designed for sensitive, low-level measurement of chlorine (Cl2) in air using a compatible automatic air sampling pump.
The 8TP provides a quantitative measuring range of 0.05 to 0.6 ppm, with a detection limit of 0.02 ppm under the specified sampling conditions. The tube uses a colorimetric reaction that produces a pink-to-white color change for visual determination of chlorine concentration.
Each box contains 10 detector tubes for 10 tests.
Automatic Air Sampling Pump Required
IMPORTANT: Gastec 8TP Chlorine Detector Tubes require a compatible automatic air sampling pump capable of maintaining the specified flow rate and sampling time for proper measurement.
Compatible Pump: Gastec GSP-501FT Automatic Air Sampling Pump
The 8TP 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 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 |
|---|---|---|---|---|
| 0.05–0.6 ppm | 100 mL/min | 1,000 mL | 1 | 10 Minutes |
The Gastec 8TP requires a continuous sampling rate of 100 mL/min for 10 minutes, providing a total sample volume of 1,000 mL. No correction factor is required when used according to these specified sampling conditions.
Product Specifications
Brand: Gastec
Tube Type: Chlorine Detector Tube for Automatic Air Sampling Pump
Part Number: 8TP
Gas Measured: Chlorine (Cl2)
Measurement Range: 0.05–0.6 ppm
Detection Limit: 0.02 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: Pink → White
Operating Temperature: 0–40°C (32–104°F)
Operating Humidity: 10–90% RH
Quantity: 10 Tubes
Tests per Box: 10
Shelf Life: 30 Months
Pump Requirement: Compatible Automatic Air Sampling Pump Required
Low-Level Chlorine Measurement
The Gastec 8TP is particularly suited for applications requiring sensitive measurement of relatively low concentrations of chlorine in air.
Its 0.05–0.6 ppm measuring range provides quantitative chlorine measurements under the specified sampling conditions.
The 0.02 ppm detection limit represents the minimum concentration capable of producing a detectable reaction under the specified conditions. It should not be interpreted as the bottom of the quantitative measuring range.
Chlorine reacts with the indicator inside the detector tube, producing a visible pink-to-white color change.
Common Applications
The Gastec 8TP Chlorine Detector Tube is intended for detecting chlorine in air under environmental atmospheric conditions. Common applications may include:
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Industrial Hygiene & Workplace Air Monitoring — Measuring low concentrations of chlorine in applicable occupational environments.
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Water & Wastewater Treatment — Monitoring applicable areas where chlorine is used for treatment or disinfection.
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Chemical Processing & Manufacturing — Evaluating workplace air where chlorine may be handled, used, produced, or released.
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Chlorine Storage & Handling Areas — Low-level monitoring around applicable chlorine equipment and storage locations.
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Leak & Release Investigations — Evaluating suspected low-level chlorine releases.
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Environmental Air Monitoring — Measuring chlorine concentrations in applicable atmospheric investigations.
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Laboratory & Research Applications — Measuring chlorine under appropriate testing and research conditions.
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Industrial Safety & Maintenance — Checking applicable work areas where chlorine exposure may occur.
Operating Conditions
The Gastec 8TP can be used from 0 to 40°C (32 to 104°F) without temperature correction and from 10 to 90% relative humidity without humidity correction.
Gastec specifies a relative standard deviation of 10% from 0.05–0.2 ppm and 5% from 0.2–0.6 ppm.
Possible Interferences
Gastec identifies several coexisting substances that may affect 8TP chlorine measurements.
Ammonia may cause a negative interference at concentrations approximately 1/6 or greater relative to the chlorine concentration. Sulfur dioxide and hydrogen sulfide may also produce negative interference.
Gastec identifies nitrogen dioxide as having no effect under the conditions listed in the manufacturer's interference data.
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 8TP Chlorine Detector Tubes.
For the 8TP, accurate measurement depends on maintaining a continuous 100 mL/min sampling rate for 10 minutes, producing a total sample volume of 1,000 mL.
Do not use a standard manual detector tube pump in place of the required automatic sampling method.
Always follow Gastec's official instructions for the 8TP detector tube and automatic sampling pump, including the required flow rate, sample volume, sampling time, operating conditions, interference information, and procedures for interpreting results.
Compatible Pump: Gastec GSP-501FT Automatic Air Sampling Pump
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