Sunday, 21 July 2019

Gastec Dosi Tubes

gastecdosi-tubes
Free Out of stock

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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.

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.

 

Description Pack Size Part Number
Dosi-Tube Holder 3 810-710
Tube Breaker Each 810-722

 

Dosi-Tubes

Chemical Tube Name Target Measuring Range (ppm) Sample Time (hours) Shelf Life (years) Part Number
Acetaldehyde

CH3CHO
Formaldehyde 0.1-20 1-10 1* 810-91D
Acetone 4-1200 1-10 2* 810-151D
Methyl ethyl
ketone
1.2-360 1-10 2* 810-152D
Acetic acid

CH3CO2H
Acetic acid 0.5-100 1-10 3 810-81D
Acetic anhydride

(CH3CO)2O
Acetic acid 0.3-60 1-10 3 810-81D
Acetone

CH3COCH3
Acetone 1-1500 1-10 2* 810-151D
Methyl ethyl
ketone
1.4-420 1-10 2* 810-152D
Ammonia

NH3
Ammonia 2.5-1000 0.5-10 3 810-3D
Ammonia 0.1-10 1-10 2 810-3DL
Benzene

C6H6
Toluene 2.4-600 1-10 2 810-122DL
1,3-Butadiene

CH2:CHCH:CH2
1,3-Butadiene 1.3-200 1-8 2 810-174D
Carbon dioxide

CO2
Carbon dioxide 0.02-12% 0.5-10 2 810-2D
Carbon monoxide

CO
Carbon monoxide 1.04-2000 0.5-48 2 810-1D
Carbon monoxide 0.4-400 0.5-24 2* 810-1DL
Chlorine

Cl2
Chlorine 0.08-100 0.5-24 2 810-8D
Trichloroethylene 2.4-240 1-8 1* 810-132D
Cumene

C6H5CH(CH3)2
Toluene 3.4-850 1-10 2 810-122DL
1,2-Dichloroethylene

ClCH:CHCl
1,3-Butadiene 3.9-600 1-8 2 810-174D
Trichloroethylene 6-600 1-8 1* 810-132D
Dimethylamine

(CH3)2NH
Ammonia 1.9-750 0.5-10 3 810-3D
N,N-Dimethylethylamine

C2H5N(CH3)2
Ammonia 4-1600 0.5-10 3 810-3D
Ethanol

C2H5OH
Ethanol 100-25000 1-10 3 810-112D
Ethyl benzene

C6H5C2H5
Toluene 2.8-700 1-10 2 810-122DL
Ethylene

CH2:CH2
1,3-Butadiene 1.5-240 1-8 2 810-174D
Formaldehyde

HCHO
Formaldehyde 0.1-20 1-10 1* 810-91D
Formic acid

HCO2H
Acetic acid 0.55-110 1-10 3 810-81D
Furfural

C5H4O2
Formaldehyde 0.3-60 1-10 1* 810-91D
Hydrazine

N2H4
Ammonia 1.6-650 0.5-10 3 810-3D
Hydrogen chloride

HCl
Hydrogen chloride 1-100 1-10 3 810-14D
Trichloroethylene 1.8-180 1-8 1* 810-132D
Hydrogen cyanide

HCN
Hydrogen cyanide 1-200 1-10 2 810-12D
Hydrogen fluoride

HF
Hydrogen fluoride 2.5-250 1-10 3 810-14D
Hydrogen chloride 1-100 1-10 3 810-17D
Hydrogen peroxide

H2O2
Hydrogen peroxide 0.5-40 1-10 3 810-32D
Hydrogen sulphide

H2S
Hydrogen sulphide 0.2-200 1-48 3 810-4D
Isoprene

CH2:C(CH3)CH:CH2
1,3-Butadiene 2.6-400 1-8 2 810-174D
Methylamine

CH3NH2
Ammonia 0.19-19 1-10 2 810-3DL
Methyl ethyl ketone

CH3COC2H5
Methyl ethyl
ketone
2-600 1-10 2* 810-152D
Formaldehyde 0.125-25 1-10 1* 810-91D
Acetone 6.5-1950 1-10 2* 810-151D
Methyl isobutyl ketone

(CH3)2CHCH2COCH3
Acetone 11.5-3450 1-10 2* 810-151D
Methyl ethyl
ketone
4-1200 1-10 2* 810-152D
Nitric acid

HNO3
Hydrogen chloride 0.8-80 1-10 3 810-14D
Hydrogen chloride 0.32-32 1-10 3 810-17D
Nitrogen dioxide

NO2
Nitrogen dioxide 0.1-30 1-10 1* 810-9D
Nitrogen dioxide 0.01-3.0 1-24 1* 810-9DL
Styrene

C6H5CH:CH2
Toluene 26-6500 1-10 2 810-122DL
Sulphur dioxide

SO2
Sulphur dioxide 10-600 1-5 2 810-5DH
Sulphur dioxide 0.2-100 1-10 3 810-5D
Tetrachloroethylene

Cl2C:CCl2
Tetrachloroethylene 3-150 1-8 1* 810-133D
Trichloroethylene 1.5-150 1-8 1* 810-132D
Toluene

C6H5CH3
Toluene 2-500 1-10 2 810-122DL
Trichloroethylene

Cl2C:CHCl
Trichloroethylene 3-300 1-8 1* 810-132D
Triethylamine

(C2H5)3N
Ammonia 5.3-2100 0.5-10 3 810-3D
Trimethylamine

(CH3)3N
Ammonia 0.23-23 1-10 2 810-3DL
Vinyl chloride

CH2:CHCl
1,3-Butadiene 1.56-240 1-8 2 810-174D
Xylene

C6H4(CH3)2
Toluene 3.4-850 1-10 2 810-122DL

* Refrigerated storage - tubes to be stored at ≤10°C

 

 

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