“ARP” Acoustic Resonance Transducer (gas detector)

“ARP” Acoustic Resonance Transducer (gas detector)

Transducers based on the acoustic-resonance principle of operation with a 4 to 20 mA universal current output for measuring pre-explosive concentrations of various gases in air.


ARP 1.0 Type Approval Certificate and Type Description

Explosion Protection.ARP1.0 Certificate of Conformity

Type certificate SI SKVA-01M for KAZAKHSTAN (Russian language)

Type certificate SI SKVA-01M for KAZAKHSTAN (Kazakh language)

  • Description
  • Specifications

Acoustic Resonant Transducers (ARP) are designed to measure pre-explosive concentrations of methane, ethane, propane, butane, isobutane, pentane, cyclopentane, hexane, hydrogen, benzene, ammonia in air, the volume fraction of carbon dioxide, 12 and 22 refrigerants, and sulphur hexafluoride (SF6), as well as alarm about the presence of combustible gases and vapours and their mixtures in air, as well as hazardous concentrations of refrigerants, and the transmission of the measurement information to the external devices.

ARP can be operated in environments containing halogens and other catalytic poisons. ARPs are used both as acoustic gas detectors, as well as part of gas detecting, or process control systems.

Application Area:

  • Chemical, oil, and gas industry;
  • Oil and gas production and processing;
  • Food industry;
  • Metallurgy industry;
  • Housing and utilities;
  • Underground car parkings;
  • Water chlorination stations;
  • Energy (SF6);
A 15 VDC to 36 VDC power supply, common industrial design;
A 15 VDC to 26 VDC power supply, Ex ib explosion-proof design;
Overall dimensions NMT:
Diameter: 90 mm;
Length (“P” design with a mating connector): 240 mm;
Device weight: NMT 2 kg;
Operating temperatures range (“P” design): 5º C to 60º C;
Operating temperatures range (“O” design): –50° C to 60° C;
Working humidity range: 0 to 80 g/m3;

The transducers withstand four times the concentration overload of the measured substance, for NLT 30 minutes.
Recovery time after overload removal: NMT 15 minutes.
Output signals:
  • unified current as per GOST 9895-78. Variation range: (4 ÷ 20) mA, load resistance: NMT 500 Ω;
  • digital RS 485 MODBUS RTU;
  • discrete: 3 closing relay signals “Threshold 1”, “Threshold 2”, “Failure”. Load capacity of the terminals: 4V, 500 mA.
All output signals operate simultaneously;
Type of protection: “ib” intrinsically safe circuit;
Explosion-proof marking: 1Ex ib IIВ T4 Gb;
Protection degree of the housing as per GOST 14254: IP65
Protection degree against electric shock: as per GOST – III;
Specified lifetime: 15 years;
MTBF: 40,000 hours.

List of gas and vapour types controlled in the gas detector mode:

methane (CH4)

ethane (C2H6) 

propane (C3H8) 

butane (C4H10)

i-butane (i-C4H10)

pentane (C5H12)

cyclopentane (C5H10)

hexane (C6H14) 6)

hydrogen (H2)

benzene (С6Н6) 

cyclohexane (C6H12) 

heptane (C7H16) 

propylene (propene) (C3H6) 

methyl alcohol (methanol) (CH3OH) 

ethanol (ethanol) (C2H5OH)

toluene (C6H5CH3)

acetone (CH3COCH3) 

methyl tert-butyl ether, (MTBE, tert-butoxymethane) (CH3СО(CH3)3)

para-xylene (п-C8H10)

ortho-xylene (o-C8H10)

isopropyl alcohol (2-propanol) (CH3)2CHOH)

1,3-butadiene (C4H6)

ethylene oxide (ethylene oxide) (C2H4O)

chloromethane (CH3Cl)

butyl acetate (C6H12O2)

ethyl acetate (C4H8O2)

2-butanone (C4H8O)

1-propanol (C3H7OH)

octane (C8H18)

oil product vapours 7)

ammonia (NH3)

carbon dioxide (CO2)

refrigerant 12 (CF2Cl2) 8)

refrigerant 22 (CHClF2) 9)

sulphur hexafluoride (SF6)

List of gas and vapour types controlled in the gas detector mode:


N,N,N’,N’-Tetramethyldiamino-methane (CH3)2NCH2N(CH3)2

1,1-Dimethylhydrazine (CH3)2NNH2

1,1-Oxybisethane (=Diethyl ether) (=Ethyl ether) (=Ether) (CH3CH2)2O

Aniline (=aminobenzene) C6H5NH2

Ethanol (=Ethyl Alcohol) CH3CH2OH

Formic acid (=Methanoic acid) HCOOH

Acetic acid (=Ethanoic acid) (=crystalline acetic acid) CH3COOH

Methanol (=Carbinol) (=methyl alcohol) CH3OH

2-Propanol (=Dimethylcarbinol) (=Isopropanol) (=Isopropyl alcohol) (CH3)2CHOH

2-Propanone (=Acetone) (=dimethylketone) (CH3)2CO

N, N-Dimethylformamide HCON(CH3)2

1-Propanol (=propan-1-ol) CH3CH2CH2OH

1-butanol (=n-butanol), (=Butyl alcohol) CH3(CH2)2 CH2OH

1-Pentanol (=n-butylcarbinol) (=n-pentyl alcohol) CH3(CH2)3CH2OH

Benzene C6H6

Methyl Chloride (=Chloromethane) (=Methyl Chloride) CH3CI

Methylamine (=Aminomethane) CH3NH2

Methantiol (=Methyl mercaptan) CH3SH

Bromoethane (=Ethyl bromide) (=Ethyl bromide) CH3CH2Br

Propane CH3CH2CH3

Propine (=Allylene) (=Methylacetylene) CH3C=CH

Chloroethane (=Ethyl Chloride) CH3CH2CI

Chloethene (=Vinyl Chloride) (=Chlorethylene) CH2=CHCI

Ethylamine (=Aminoethane) C2H5NH2

Acetonitrile (=ethanenitrile) (=methyl cyanide) CH3CN

Ethanal (=Acetaldehyde) (=Acetaldehyde) CH3CHO

Ethantiol (=Ethyl mercaptan) (=Ethyl hydrosulfide) CH3CH2SH

Carbon disulfide (=carbon disulfide)

Dimethyl sulfide C2H6S

Cyclopropane (=Trimethylene) CH2CH2CH2

Ethylene oxide CH2CH2O

Isobutane (CH3)2CHCH3

2-Chlorpropan (CH3)2CHCI

Isopropylamine (CH3)2CHNH2

1,1-Dichloroethane (=Ethylidendichloride) CH3CHCI2

1,1-Dichlorethen CH2=CCI2

Acetyl chloride CH3COCI

1,1-Difluoroethene CH2=CF2

Trimethylamine (CH3)3N

Nitromethane CH3NO2

1,2-Epoxypropene CH3CHCH2O

2,2-Dimethylbutane (CH3)3CCH2CH3

2-Methyl-2-butanol CH3CH2C(OH)(CH3)2

Acetone cyanohydrin CH3C(OH)CNCH3

2,2,2-Trifluoroethanol CF3CH2OH

Dicyclopentadiene (technical) C10H12

Dimethyl Sulfate ((CH3O)2SO2

Tetraethyl Silicate (C2H5)4Si

2-Methylbutane (CH3)2CHCH2CH3

2-Methyl-1-butene-3-in HC=CC(CH3)CH2

Isobutylamine (CH3)2CHCH2NH2

2-Methyl-1-propanol (CH3)2CHCH2OH

Isobutanal CH3)2CHCHO

2-Chlorobutane (=butyl chloride) CH3CHCICH2CH3

1,2-Dichloropropane (=propylene chloride) CH3CHCICH2CI

2-butanol CH3CHOHCH2CH3

2- Butanone (=methyl ethyl ketone) CH3CH2COCH3

Propionic Acid CH3CH2COOH

Propene (Acrylic) Acid CH2=CHCOOH

Acetic acid methyl ester (=methyl acetate) CH3COOCH3

Chlorocarboxylic acid methyl ester (=Methyl chloroformate) CH3OOCCl

Nitrobenzene CH3CH2NO2

2,3-dimethylbutane (CH3)2CH(CH3)CH2CH3

2-methylpropanoic acid (=isobutanoic acid) (CH3)2CHCOOH

Trifluorochloroethene CF2=CFCI

Methyl methacrylate CH3=CCH3COOCH3

Naphthalene C10H8

1,2-dimethylbenzene (=Xylene) C6H4(CH3)2

3-Pentanone ((CH3CH2)2CO

Methylpropeonate CH2=CHCOOCH3

Methylcyclopentane CH3CH(CH2)3CH2

Ethyl Isobutyrate (CH3)2CHCOOC2H5

Ethyl methacrylate CH2=CCH3COOCH2CH3

2-Methylpropyl-2-methylpropanoate (=Isobutylisobutyrate) (CH3)2CHCOOCH2CH(CH3)2

Butyl methacrylate CH2=C(CH3)COO(CH2)3CH3

2-ethylbutanol CH3CH(CH2CH3)CH2CH2OH

2-Tetrahydrofurylmethanol OCH2CH2CH2CHCH2OH

Furfuryl alcohol C(CH2OH)CHCHCH

2-Furaldehyde (=furan-2-aldehyde) (=fural) (=furfural) OCH=CHCH=CHCHO

Isopropylbenzene C6H5CH (CH3)2

a-Methylstyrene (=1-(Methylvinyl)benzene) C6H5C(CH3)=CH2

Nitrobenzene C6H5NO2

p-Cymol CH3C6H4CH (CH3)2

Vinylcyclohexene (CH2=CH)CH(CH2)4CH2

Ethylbenzene C6H5CH2CH3

Styrene (=vinylbenzene) (=phenylethylene) C6H5CH=CH2

4-Vinylpyridine NCHCHC(CH2=CH)CHCH

a-Chlortoluene C6H5CH2CI

Benzaldehyde C6H5CHO

2-Vinylpyridine (=2-Ethenylpyridine) NC(CH2=CH)CHCHCHCH

2-Ethylhexyl acetate CH3COOCH2CH(C2H5)C4H9

2-Ethylhexyl acrylate CH2=CHCOO(CH2)4CH3

2-ethyl-1-hexanol CH3(CH2)3CH(CH2CH3)CH2OH

Methylacetoacetate CH3COOCH2COCH3

Acetic acid sec-butyl ester (=Sec-Butyl acetate) (=Acetic sec-butyl ester) CH3COOCH(CH3)CH2CH3

Isopropyl chloroacetate CICH2COOCH(CH3)2

Ethyl Butyrate CH3CH2CH2COO CH2CH3

Diethyl carbonate (CH3CH2O)2CO

3-Heptanone CH3CH2CO(CH2)3CH3

1. 4-Dimethylbenzene (=para-Xylene) C6H4(CH3)2

Dichlorobenzenes C6H4CI2

1,4-Dimethylpiperazine NH(CH3)CH2CH2NH(CH3)CH2CH2

1-Chloro-2,3-epoxypropane OCH2 CHCH2CI

3-bromo-1-propine (=Propargyl bromide) CH3CHºCBr

Butane CH3(CH2)2CH2

1-butene CH2=CHCH2CH3

1,3-Butadiene (=divinyl) (=erythrene) CH2=CHCH=CH2

Butin-1 CH3CH2C=CH

Propenal (=acrolein) CH2=CHCHO

3-Chloro-1-propene (=allyl chloride) CH2=CHCH2CI

1,2-Dichloroethane CH2CICH2CI

2-Chloroethanol (=ethylene chlorohydrin) (=2-chloroethanol) CH2CICH2OH

Propylamine CH3(CH2)2NH2

Propenonitrile (=Acrylonitrile) CH2=CHCN

1,2-Diaminoethane (=ethylenediamine) NH2CH2CH2NH2

2-Propen-1-ol (=allyl alcohol) CH2=CHCH2OH

2-Propyn-1-ol HCºCCH2OH

Chloroacetic Aldehyde CICH2CHO

Methyl Formate (=Formic Acid) HCOOCH3

1-Nitropropane CH3CH2CH2NO2

Vinyl acetate CH3COOCH=CH2

4-Methyl-2-pentanone (CH3)2CHCH2COCH3

4-Methyl-2-pentanol ((CH3)2CHCH2CHOHCH3

N-(1-Methylethyl)-2-propanamine (=Diisopropylamine) ((CH3)2CH)2NH

Diisopropyl ether (=2-isopropoxypropane)((CH3)2CH)2O

Isopropyl acetate (=Acetic acid isopropyl ether) (=Isopropyl ether) CH3COOCH(CH3)2

Acetic Anhydride (CH3CO)2O

1,3-dimethylbenzene (=meta-xylene) C6H4(CH3)2

Metaldehyde (C2H4O)4

1, 3, 5-Trimethylbenzene CHC(CH3)CHC(CH3)CHC(CH3)

2,6-Dimethyl-4-heptanol ((CH3)2CHCH2)2CHOH

Methylcyclohexane CH3CH(CH2)4CH2

Toluene C6H5CH3

4-Methylpyridine NCHCHC(CH3)CHCH2

Chlorobenzene (=Phenyl chloride) C6H5CI

Cyclohexylamine (=Aminocyclohexane) CH2 (CH2)4CHNH2

Cyclohexanol CH2 (CH2)4CHOH

Cyclohexanone (=anon) (=pimelinketone) CH2(CH2)4CO

Phenol C6H5OH

3-methylpyridine NCHC(CH3)CHCHCH

2-methylpyridine NC(CH3)CHCHCHCH

N, N-dimethyl-1,3-diaminopropane (CH3)2N(CH2)3NH2

Propyl acetate CH3COOCH2CH2CH3

1-Prombutane CH3(CH2)2CH2Br

n-pentane CH3(CH2)3CH3

1-Chlorobutane (=butyl chloride) CH3(CH2)2CH2CI

Butylamine CH3(CH2)3NH2

n-butyl mercaptan CH3(CH2)3SH

2-methoxyethanol CH3OCH2CH2OH

Dimethoxymethane (=Methylal) (=Dimethylformal) CH2(OCH3)2

Diethylamine (C2H5)2NH

Formic acid ethyl ester HCOOCH2CH3

Ethyl nitrite CH3CH2ONO

Tetrahydrofuran СH2(CH2)2CH2O


Tetrahydrothiophene СH2(CH2)2CH2S

Thiophene CH=CHCH=CHS

Di-tert-butyl peroxide ((CH3)3COOC(CH3)3

2-heptanone CH3CO(CH2)4CH3

Hexane (mixture of isomers) CH3(CH2)4CH3

1-Pentanal CH3(CH2)3CHO

1,2-Dimethoxyethane (=monoglyme) (=ethylene glycol dimethyl ether) CH3O(CH2)2OCH3

2-Ethoxyethanol (=Ethyl cellosolve) (=Ethylene glycol ethyl ether) CH3CH2OCH2CH2OH

Cyclohexane CH2(CH2)4CH2

Cyclohexene CH2(CH2)3CH=CH

Pyridine C5H5N

1,3,5-Trioxane OCH2OCH2OCH2

Morpholine (=diethyleneimide oxide) (=tetrahydro-1,4-oxazine) OCH2CH2NHCH2CH2

Diisobutylamine ((CH3)2CHCH2)2NH

2-Ethoxyethyl acetate CH3COOCH2CH2OCH2CH3

1-hexanol (=amylcarbinol) CH3(CH2)4CH3

Dipropyl ether CH3(CH2)2O

Azepan CH2 (CH2)5NH

n-octane CH3(CH2)6CH3

1,4-Dicyanobutane (=adiponitrile) NC(CH2)4CN

1-Heptanol CH3(CH2)5CH2OH

2-butoxyethanol CH3(CH2)3OCH2OH

Nonane CH3(CH2)7CH2

1-Octanol (=heptylcarbinol) CH3(CH2)6CH2OH

2-(2-Ethoxyethoxy) ethanol CH3CH2OCH2CH2OCH2CH2OH

Butoxyethanol C4H9O(CH2)2OCOCH3

1-decanol (=decyl alcohol) CH3(CH2)9OH

2- (2-Butoxyethoxy) ethanol CH3(CH2)3OCH2CH2OCH2CH2ОH

1-Dodecene CH3(CH2)9CH=CH2

Propene (=Propylene) CH2=CHCH3

Dimethyl ether(=methyl ether) (CH3)2O

2-Methyl-1-propene (CH3)2C=CH2

Tetrafluoroethylene (Tetrafluoroethylene) CF2=CF2

Triethylamine (CH3CH2)3N

Xylidine C6H3(CH3)2NH2

2-Ethylhexanal CH3CH(CH2CH3)(CH2)3CHO

1-Propanal CH3CH2CHO

4-Hydroxy-4-methyl-2-Pentanone CH3COCH2C(CH3)2OH

3-Methyl-1-butanol (CH3)2CH(CH2)2OH

2,4-Pentanedione CH3COCH2COCH3

2,4,6-Trimethyl-1,3,5-trioxane OCH(CH3)OCH(CH3)OCH(CH3)

1-Butanal CH3CH2CH2CHO

Butyl acetate CH3COOCH2(CH2)2CH3

1,4-dioxane OCH2CH2OCH2CH2

Octanal CH3(CH2)6CHO

(n-decane), Decane (mixture of isomers) C10H22

Dimethylamine (CH3)2NH

2-chlorobutadiene-1,3(=chloroprene) CH2=CCICH=CH2

Dipentene CH3CCHCH2CH(C(CH3)=CH2)CH2CH2

Acrylic Acid Ethyl Ester (=Ethyl Acrylate) CH2=CHCOOCH2CH3

n-Butyl acrylate (=butyl acrylic acid ester) CH2=CHCOOC4H9

Acetic acid ethyl ester (=Ethyl acetate) CH3COOCH2CH3

4-Methyl-3-penten-2-one (=mesityl oxide) (CH3)2CCHCOCH3

Ethyl Acetoacetate CH3COCH2COOCH2CH3

Cyclopentene CH=CHCH2CH2CH

(n-heptane), Heptane (mixture of isomers) C7H16

Dipropylamine (CH3CH2CH2)2NH

Dibutyl ether (CH3(CH2)3)2О

Ethyleneimine (=Aziridine) CH3CH2N

Cyclobutane (=tetramethylene) CH2(CH2)2CH2

Cyclopentane (=pentamethylene) CH2(CH2)3CH2

Cycloheptane CH2(CH2)3CH2

1,1,2,2-Tetrafluoroethoxybenzene C6H5OCF2CF2H

Trifluoroethene CF2=CFH

1,1,1-Trifluoroethane CF3CH3

Butyryl fluoride CH3(CH2)2COF

Carbon Sulphide Oxide COS

Decalin CH2(CH2)3CHCH(CH2)3CH2

1,3-Pentadiene CH2=CH-CH=CH-CH3

2-Methyl-2-butene (CH3)2C=CHCH3

2-Methyl-1-chloropropane (CH3)2CHCH2Cl

1,2,3-Trimethylbenzene CHCHCH(CH3) C(CH3)C(CH3)

2-Methylfuran OC(CH3) CHCHCH

1-chloropropane CH3CH2CH2Cl

1,2-Dichloroethene (=Acetylene Dichloride) ClCH=CHCl

Methyl ethyl ether CH3OCH2CH3

2,2,4-Trimethylpentane (=Isooctane) (CH3)2CHCH2C(CH3)3

Acetic acid tert-butyl ester CH3COOC(CH3)3

2-Methylthiophene SC(CH3)CHCHCH

Acetyl Fluoride CH3COF

2-Methyl-3-chloropropene CH2=C(CH3)CH2CI

3,4-Dimethylhexane CH3CH2CH(CH3)CH(CH3)CH2CH

n-Butyl propionate C2H5COOC4H9

cis-2-butene CH3CH=CHCH3

3-Methylbutanal (CH3)2CHCH2CHO

2-Hexanone CH3CO(CH2)3CH3

Propenyl acetate (=allyl acetate) CH2=CHCH2OOCCH3

2-Methyl-2-pentenal CH3CH2CHC(CH3)COH

Methyl isocyanate CH3NCO

Dimethyldisulfide CH3SSCH3

Amyl acetate CH3COOCH(CH3)(CH2)2CH3

Pentyl acetate CH3COO(CH2)4CH3

1,3-dioxolane OCH2CH2OCH2

3,3,3-Trifluoro-1-propene CF3CH=CH2

3,4-Dichloro-1-butene CH2=CHCHCICH2CI

Acetylcyclopropane CH2CH2CHCOCH3

Propenoyl Chloride (=Acryloyl Chloride) CH2CHCOCI

1-Decene CH2(CH2)8CH3

2-Methylpropenoyl chloride CH2CCH3COCl

2-Methyl-2-methoxybutane (CH3)2C(OCH3)CH2CH3

Methylene Cyclobutane C(=CH2)(CH2)2CH2

Xylidine C6H3(CH3)2NH2

Cresol (mixture of isomers) CH3C6H4OH

тtert-Butoxymethane (MTBE) CH3OC(CH3)3

Ethylcyclopentane CH3CH2CH(CH2)3CH2 

Isopropyl nitrate (CH3)2CHONO2