The Gastec 17TP Hydrogen Fluoride Detector Tubes are designed for sensitive, low-level measurement of hydrogen fluoride (HF) in air using a compatible automatic air sampling pump.

The 17TP provides a quantitative measuring range of 0.05 to 9.0 ppm, with a detection limit of 0.025 ppm under the specified sampling conditions. The tube uses a colorimetric reaction that produces a yellow-to-brown color change for visual determination of hydrogen fluoride concentration.

Each box contains 10 detector tubes for 10 tests.

Automatic Air Sampling Pump Required

IMPORTANT: Gastec 17TP Hydrogen Fluoride 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

The 17TP is an automatic air sampling pump detector tube and should not be treated as a standard hand-pump detector tube. Accurate measurement depends on maintaining the specified flow rate and sampling time for the concentration range being measured.

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
0.05–3.0 ppm	100 mL/min	1,000 mL	1	10 Minutes
3.0–9.0 ppm	50 mL/min	500 mL	3.0	10 Minutes

For measurements from 0.05 to 3.0 ppm, sample at 100 mL/min for 10 minutes, providing a total sample volume of 1,000 mL. The correction factor is 1.

For measurements above 3.0 ppm and up to 9.0 ppm, use a fresh detector tube and sample at 50 mL/min for 10 minutes, providing a total sample volume of 500 mL. Multiply the tube reading by the specified 3.0 correction factor.

Product Specifications

Brand: Gastec
Tube Type: Hydrogen Fluoride Detector Tube for Automatic Air Sampling Pump
Part Number: 17TP
Gas Measured: Hydrogen Fluoride (HF)
Measurement Range: 0.05–9.0 ppm
Primary Measurement Range: 0.05–3.0 ppm
Extended Measurement Range: 3.0–9.0 ppm
Detection Limit: 0.025 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 3.0 depending on measurement range
Sampling Time: 10 Minutes
Color Change: Yellow → Brown
Operating Temperature: 10–35°C (50–95°F), correction required
Operating Humidity: 20–80% RH, correction required
Relative Standard Deviation: 10% for 0.05–1.0 ppm; 5% for 1.0–3.0 ppm
Quantity: 10 Tubes
Tests per Box: 10 Tests
Shelf Life: 30 Months
Pump Requirement: Compatible Automatic Air Sampling Pump Required

Low-Level Hydrogen Fluoride Measurement

The Gastec 17TP is designed for sensitive measurement of hydrogen fluoride (HF) in air and applicable industrial and environmental atmospheric conditions.

Its quantitative measuring range extends from 0.05 to 9.0 ppm using two sampling configurations.

The 0.025 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 0.025–9.0 ppm measurement range.

During sampling, hydrogen fluoride reacts with the indicator inside the tube, producing a visible yellow-to-brown color change.

Common Applications

Gastec 17TP Hydrogen Fluoride Detector Tubes may be used for applicable HF air-monitoring applications including:

• Industrial Hygiene & Occupational Exposure Monitoring

• Chemical Manufacturing & Processing

• Semiconductor & Electronics Manufacturing

• Metal Processing & Surface Treatment

• Industrial Process Air Monitoring

• Hydrogen Fluoride Leak & Release Investigations

• Environmental Atmospheric Monitoring

• Laboratory & Research Applications

• Industrial Safety & Maintenance

• Low-Level Hydrogen Fluoride Monitoring

Temperature & Humidity Correction

Unlike several other TP-series detector tubes, the Gastec 17TP requires consideration of both temperature and relative humidity when determining the final hydrogen fluoride concentration.

The tube is designed for use between 10 and 35°C (50–95°F) and 20 to 80% relative humidity.

Gastec provides a temperature/humidity correction table in the official 17TP instruction manual. The appropriate correction factor should be applied to the detector tube reading according to the actual temperature and relative humidity at the time of measurement.

Atmospheric pressure correction may also be required according to the procedure provided in the official Gastec instruction manual.

Possible Interferences

Certain coexisting substances may affect Gastec 17TP measurements.

Nitric Acid: Concentrations of 0.5 ppm or greater may produce a positive interference and may independently produce a pale reddish-purple color.

Hydrogen Chloride: Concentrations of 0.1 ppm or greater may produce a positive interference and may independently produce a reddish-purple color.

Hydrogen Peroxide: At concentrations of 10 ppm or less, Gastec identifies no interference and no independent discoloration under the manufacturer's specified test conditions.

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

Important HF Sampling Precaution

Stop sampling immediately if the entire detecting layer changes color.

Gastec specifically warns that if sampling continues after the detector tube has produced a complete color change, hydrogen fluoride may be drawn through the tube and into the sampling pump, potentially damaging the pump.

For measurements above 3.0 ppm, use a fresh detector tube, change the sampling rate to 50 mL/min, and perform a new 10-minute measurement according to Gastec's procedure.

Important

A compatible automatic air sampling pump is required for correct use of the Gastec 17TP Hydrogen Fluoride Detector Tubes.

For the primary 0.05–3.0 ppm range, sampling is performed at 100 mL/min for 10 minutes.

For the extended 3.0–9.0 ppm range, a fresh tube is used at 50 mL/min for 10 minutes, and a 3.0 correction factor is applied.

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

Temperature, humidity, and atmospheric pressure corrections should be applied when required according to the official Gastec 17TP instruction manual.

Always follow Gastec's official instructions for the 17TP detector tube and automatic sampling pump, including flow rate, sample volume, sampling time, environmental correction factors, interference information, and measurement procedures.

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

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