Gastec Colour Gas Detector Tubes

The Gastec detector tube system comprises a handheld Gastec Gas sampling pump and Gastec detector tubes.

Gastec Colour Detector Tubes
  • Ideal for short term measurement and low level detection
  • Uses simple colour change technology
  • Determining and measuring concentration peaks
  • Detecting leaks in pipelines gas installations, etc
  • Air analysis in sewers, shafts and confined spaces

Gastec Detector Tubes are used in environments where sampling, screening and TWA measurement is required. They are of the highest quality for accurately analysing a wide variety of gases, vapours and ground substances. The glass tubes are filled with chemical reagent that absorbs and reacts with the target gas or vapour being measured. A colorimetric stain (a colour change) is created. For most tubes, the concentration is read directly from the pinpoint accurate measurement scale on each tube. This form of monitoring is ideal for spot sampling as it can be more accurate then electronic gas detectors.

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Gastec Injection Type Tubes

Uses an injector tube to sample gas samples, which is inserted into a detector tube to perform measurements. Detector tubes used for high concentration carbon dioxide and propane gases apply this feed-in method.

Stage 1 - Break off both ends of a detector tube

Stage 1 - Break off both ends
of a detector tube

Stage 2 - Attach the syringe inlet to the syringe

Stage 2 - Attach the syringe
inlet to the syringe

Stage 3 - Collect 20ml of sample into the syringe

Stage 3 - Collect 20ml of
sample into the syringe by
pulling its piston.

Stage 4  - Insert tube securely

Stage 4 - Insert tube securely
into the detector tube for
specified sampling time

Tubes are supplied in packs for 10 tests.

Click on the symbol to view the specific datasheet.

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Gastec Compressed Breathing Air Measurement System

The Gastec 810-CG-1 system can simply, quickly, and simultaneously measure four kinds of harmful contaminants (CO, CO2, Water vapour, and Oil mist) contained in compressed breathing air (cylinder or compressor).

Gastec Compressed Breathing Air Measurement System

          Kit

Easy to Use

    System Set-up

CG1 Measurement Device

Measurement Device

  • Fast and easy determination of breathing air quality - simply connect the measuring device to a cylinder or compressor
  • Portable - no power supply required

Airtec Tube Specifications when used with the Compressed Breathing Air Measurement Kit

Airtec Tube Measuring Range (ppm) Flow Rate (ml/min) Sampling Time (mins) Part Number
Carbon monoxide CO 5-50 100  5 810-1A
Carbon dioxide CO2 250-3000 190  5 810-2A
Water vapour 10-80 mg/m3 100  5 810-6A
Oil mist 0.2-5.0 mg/m3 3000  10 810-109AD

 

Compressed Breathing Air Measurement Kit Part Number
Gastec Compressed Breathing Air Measurement System includes:

Measuring device, 4 x rubber shrouds, 4 Gastec Airtec Tubes (810-1A, 810-2A, 810-6A, 810-109AD), stopwatch, tube tip breaker/holder, plastic carrying case, instruction manual and deep socket. 

810-CG-1
 
Accessory Part Number  
Replacement rubber shroud/tube holder 810-357 no image
 
Instructions for the Gastec Compressed Breathing Gas System

Instructions

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Gastec Toxic Gas Detection System

The prime importance in the case of emergency response to chemical spills, or investigation after a fire, is to quickly determine any gases present and their concentrations. With the Gastec Toxic Gas Detection System this can be accomplished quickly, easily and accurately on the site, using 12 types of Gastec Detector Tubes and the Gas Sampling Pump. As the substances to be measured could be hazardous, adequate precautions should be taken to ensure safety.

Gastec Toxic Gas Detection System

          Kit

Toxic Gas Determination Flowchart

        Flowchart

  • Fast and easy determination of pollutants
  • Portable - no power supply required
  • Minimal training required - follow the simple flowchart
  • Cost effective
  • Minimal maintenance compared to electronic detection systems

Measurement Procedure

1. Confirm the air current direction using the Smoke Tester Kit
2. Connect the Extension Hose if necessary, to take a sample from a hard-to-reach area or from a manhole
3. Break off both ends of a Polytec I (Part Number 810-107) tube and connect it to the pump (or to the end of the extension hose if used)
4. Pull out the handle of the pump, wait for the predetermined sampling time, and examine the tube for colour changes
5. Proceed with the measurements by using the 12 types of detector tubes, as directed by the Toxic Gas Determination Flowchart
6. Finally, determine the pollutants from the measurement results

Description Part Number
Gastec Toxic Gas Detection System, includes

Smoke Test Kit (810-500), 12 boxes of Gastec Tubes (810-107, 810-141, 810-128, 810-151, 810-135, 810-111L, 810-4LL, 810-1L, 810-14L, 810-3LA, 810-12L, 810-8LA), Gas Sampling Pump (810-110), 5 m Extension Hose (810-350A), 2 x rubber connectors, handbook and lockable aluminium carry case. Dimensions: 46.5 x 13.8 x 37.3 cm (18.3 x 5.4 x 14.6 inches), Weight: 5 kg (11 lb)

810-TG1

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Gastec Passive Dosi-Tubes

Gastec Colour Dosimeter Tubes (Dosi-tubes) provide reliable, on-the-spot Time-Weighted Average (TWA) monitoring of worker exposure to gases and vapours. The system is simple-to-use and easy-to-read, with no need for a pump, chart, or laboratory analysis. The Dosi-tube system allows an operator to evaluate the level of exposure over a long time period such as a working shift.

The system consists of Gastec Dosi-tubes and a tube holder (part number 810-710). The pre-scored ends of the tube are simply snapped off and the tube inserted into a tube holder. Air diffuses passively through the tube and reacts with the detecting reagent within, giving a colour change result that is indicated on the printed scale. The tube holder can either be attached in a worker’s breathing zone or installed in work areas to act as an area monitor.

Gastec Dosi-Tubes
Dosi-Tube Holder
Dosi-Tube Holder and Tubes

Using a simple equation, the Dosi-tube system produces an average concentration of exposure over a set period of time – commonly known as a Time Weighted Average (TWA). To calculate the ppm level simply read the printed calibrated scale on the tube for exposure measurement in parts-per-million-hours (ppm-hours), and divide the reading by the number of hours sampled.

Note: When measuring carbon dioxide, mount the tube holder on the worker’s waist rather than in their breathing zone. This will avoid overstating CO2 levels due to exhalation.

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