Gastec Hydrogen Cyanide Detector Tubes | 12TP are designed for sensitive measurement of hydrogen cyanide (HCN) in air using a compatible Gastec automatic air sampling pump. The tube provides a primary measuring range of 0.3 to 4.5 ppm, with measurements extendable from 4.5 to 9.0 ppm using the specified sampling conditions and correction factor.
With a detection limit of 0.05 ppm, the Gastec 12TP is suited for applications requiring measurement of relatively low concentrations of hydrogen cyanide. The tube uses a colorimetric reaction that produces a yellow-to-pink color change for visual determination of HCN concentration.
Each box contains 10 detector tubes for 10 tests.
Automatic Air Sampling Pump Required
Important: Gastec 12TP Hydrogen Cyanide Detector Tubes require a compatible Gastec automatic air sampling pump, such as the GSP-501FT, for proper sampling and accurate detection. These tubes are designed around specific flow rates, sample volumes, and sampling times and are not intended to be used as standard hand-pump detector tubes.
The automatic sampling pump must be configured according to Gastec's specified sampling conditions for the measurement range being tested.
Compatible Pump: Gastec GSP-501FT Automatic Air Sampling Pump
Measurement & Sampling Specifications
| Measurement Range | Sampling Rate | Sample Volume | Correction Factor | Sampling Time |
|---|---|---|---|---|
| 0.3–4.5 ppm | 100 mL/min | 1,000 mL | 1 | 10 Minutes |
| 4.5–9.0 ppm | 50 mL/min | 500 mL | 2 | 10 Minutes |
Gastec specifies different automatic sampling conditions depending on the desired measurement range. The primary 0.3–4.5 ppm range requires a 100 mL/min sampling rate and 1,000 mL sample volume. Measurements from 4.5–9.0 ppm require a 50 mL/min sampling rate, 500 mL sample volume, and a correction factor of 2.
Product Specifications
Brand: Gastec
Tube Type: Hydrogen Cyanide Detector Tube
Part Number: 12TP
Gas Measured: Hydrogen Cyanide (HCN)
Primary Measurement Range: 0.3–4.5 ppm
Extended Measurement Range: 4.5–9.0 ppm
Detection Limit: 0.05 ppm at 1,000 mL
Sampling Rate: 50 or 100 mL/min, depending on measurement range
Sampling Time: 10 Minutes
Color Change: Yellow → Pink
Operating Temperature: 5–40°C (41–104°F)
Operating Humidity: 0–90% RH
Quantity: 10 Tubes
Tests per Box: 10
Shelf Life: 12 Months
Pump Requirement: Compatible Gastec Automatic Air Sampling Pump Required
Low-Level Hydrogen Cyanide Measurement
The Gastec 12TP is designed for applications where sensitive measurement of hydrogen cyanide is required. Its 0.3–4.5 ppm primary measuring range and 0.05 ppm detection limit make it particularly useful for evaluating relatively low HCN concentrations.
Hydrogen cyanide reacts with the tube reagent to form an intermediate material that stains the indicator pink, providing the visual indication used to determine concentration.
Common Applications
The Gastec 12TP Hydrogen Cyanide Detector Tube may be used for applications requiring low-level HCN measurement, including:
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Industrial Hygiene & Workplace Air Monitoring — Evaluating hydrogen cyanide concentrations in occupational environments where HCN exposure may occur.
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Chemical Manufacturing & Processing — Monitoring areas where hydrogen cyanide or cyanide-containing materials are produced, processed, transferred, or used.
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Electroplating & Metal Processing — Checking applicable work areas where cyanide compounds are used in plating or metal-finishing processes.
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Mining & Mineral Processing — Monitoring applicable environments where cyanide compounds are used in mineral processing.
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Laboratory & Research Facilities — Measuring low concentrations of HCN in applications where sensitive colorimetric testing is appropriate.
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Leak & Release Investigations — Evaluating suspected hydrogen cyanide releases around applicable equipment, processes, or storage areas.
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Industrial Safety & Maintenance — Checking work areas where HCN may be generated or released during processing or maintenance activities.
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Environmental & Process Air Testing — Measuring low-level HCN concentrations in applicable air-monitoring applications.
Operating Conditions
The Gastec 12TP can be used from 5 to 40°C (41 to 104°F) without temperature correction and at 0 to 90% relative humidity without humidity correction. Gastec specifies a relative standard deviation of 5% for the 0.3–4.5 ppm range.
Possible Interferences
Gastec identifies several substances that may affect measurements, including ammonia, hydrogen chloride, nitric acid, sulfur dioxide, nitrogen dioxide, hydrogen fluoride, and hydrogen sulfide. Carbon monoxide and carbon dioxide are listed as producing no interference under the conditions specified by Gastec.
Because several interfering substances can produce a pink or pale-pink indication, their presence should be considered when interpreting HCN measurements.
Important
A compatible Gastec automatic air sampling pump is required to use the 12TP Hydrogen Cyanide Detector Tubes correctly. Accurate measurement depends on drawing the specified volume of air through the tube at the correct flow rate for the full sampling period.
Do not substitute a standard manual detector tube pump for the required automatic sampling method. Always follow Gastec's official operating instructions for the 12TP Hydrogen Cyanide Detector Tube and the automatic sampling pump, including the specified flow rate, sample volume, correction factor, sampling time, operating conditions, and procedures for interpreting results.
Compatible Pump: Gastec GSP-501FT Automatic Air Sampling Pump
Choose Instrument Depot for dependable Gastec 12TP Hydrogen Cyanide Detector Tubes, Gastec automatic air sampling pumps, GSP-501FT sampling equipment, HCN detector tubes, low-level hydrogen cyanide testing, industrial hygiene air monitoring, and industrial gas detection supplies.