VOC Gas Detector | Customized Multi-Gas Detection

The VOC Gas Detector is used for mobile, rapid detection of various volatile organic compound (VOC) gas concentrations, temperature and humidity measurement (optional), and alarm functions for exceeding limits. It uses gas sensors from reputable brands (Honeywell, Nemoto (Japan), CITY (UK), Alpha (UK), Dynament (UK), Membrapor (Switzerland, etc.), and its main detection principles include electrochemical, infrared, catalytic combustion, thermal conductivity, and PID photoionization.

The VOC Gas Detector can detect VOC gas concentrations in pipelines, confined spaces, and the atmosphere. It can also detect gas leaks or high concentrations of single gases with nitrogen or oxygen as background gases, and can detect over 500 types of gases.

★★★★★

  • Short delivery time
  • Better price
  • Customizable parameters

Features

● Waterproof, dustproof, explosion-proof, and shockproof. Intrinsically safe circuit design, anti-static, and anti-electromagnetic interference. Passes national standard testing and CPA metrological instrument type certification.

● IP66 protection level, with optional accessories for use in high humidity and high dust environments.

● Built-in pump-suction measurement, rapid response, sampling distance greater than 10 meters. Special gas path design, with optional accessories, can detect gases with positive or negative pressure from -0.3 to 2 kg without affecting the measurement results.

● 3.5-inch high-definition color screen displays real-time concentration, alarm, time, temperature, humidity, storage, communication, printing, battery level, charging status, and other information.

● Large-capacity data storage, larger capacity can be customized. Supports real-time storage, timed storage, or storage of alarm concentration data and time only; supports local viewing and deletion of data. Data can also be uploaded to a computer via USB or RS232 interface for analysis, storage, and printing using host computer software.

● Standard USB interface, optional: RS232/RS485. Optional built-in or external wireless infrared printer. Print content: Company name, gas name, date and time, ambient temperature and humidity, concentration data, and test results (pass/fail).

● USB charging port, can be charged with a computer or a power bank. Compatible with mobile phone chargers, overcharge, over-discharge, overvoltage, short circuit, and overheat protection. 5-level accurate power display. Supports USB hot-swapping; the analyzer can operate normally while charging.

● Uses a 5400mAh×2 high-capacity rechargeable polymer battery for extended continuous operation.

● Audible and visual alarms, undervoltage alarm, and fault alarm; multi-directional 3D display of alarm status during alarms.

● Alarm values ​​are configurable; alarm modes include low alarm, high alarm, range alarm, and weighted average alarm.

● High-precision temperature and humidity measurement (optional), with simultaneous sensor temperature compensation. Instrument operating temperature range: -40～70 degrees Celsius; can detect gases up to 1300 degrees Celsius (optional high-temperature sampling cooling filter handle or high-temperature and high-humidity pretreatment system).

● Detectable concentrations from 0.001 PPM to 99.999% Vol, with automatic switching between high and low ranges (please specify when ordering).

● Real-time or timed detection is possible (for small quantities of gas). The pump can be turned off when not in use to extend operating time.

● Optional simultaneous detection of 1-6 gases, expandable to a maximum of 18. Units are freely switchable; molecular weight is not required for common gases, but is automatically calculated and switched for special gases. Selectable units: PPM, mg/m3, Vol%, LEL%, PPHM, ppb, mg/L.

● Three display modes are switchable: simultaneous display of four gas concentrations, large-font cyclic display of single-channel gas concentration, and real-time curve. Automatic or manual cycling between channels is available. Maximum and minimum values ​​and gas names can be displayed. Historical data curves can be viewed.

● Data recovery function: selective or full recovery. Automatic identification and prevention of concentration calibration errors to avoid human error.

● Automatic zero-point tracking and multi-level target point calibration ensure measurement linearity and accuracy.

● Records calibration logs, maintenance logs, and troubleshooting strategies. Includes sensor lifespan expiration reminders and next concentration calibration time reminders.

Specifications

Gas DetectionVolatile Organic Compounds (VOCs), optional: simultaneous detection of 1-6, up to 18 gases, and temperature and humidity measurement, depending on the sensor and site environment.
ApplicationsSuitable for all applications requiring portable, rapid gas concentration detection, including petroleum, chemical, pharmaceutical, environmental protection, gas distribution, warehousing, flue gas analysis, and air treatment.
Measuring Range & ResolutionVOC: 0-100ppm, 0.01ppm, imported high-precision electrochemical sensor
or VOC: 0-100%LEL, 0.1%LEL, industrial-grade catalytic combustion sensor
or VOC: 0-10ppm, 0.01ppm, imported high-precision PID photoionization sensor. Other ranges, principles, and resolutions can be customized.
Tolerant Error≤±2%F.S (Actual accuracy depends on the performance of the selected sensor)
Linearity≤±2%Repeatability≤±2%Uncertainty≤±2%
Response TimeT90≤20SRecovery time≤30S
Unit SwitchingUnits can be freely switched. For conventional gases, no molecular weight needs to be entered, but for special gases, the molecular weight needs to be entered and the system will automatically calculate and switch. Selectable units include: PPM, mg/m3, Vol%, LEL%, PPHM, ppb, and mg/L.
Operating EnvironmentTemperature: -40℃～+70℃, Humidity: ≤10～95%RH (non-condensing)
Power Supply3.7VDC, 5400mAh×2 high-capacity rechargeable polymer battery
Display Method3.5-inch high-definition color screen
Detection MethodBuilt-in pump-type measurement
Alarm MethodLarge-capacity data storage supports expansion.
Communication InterfaceSB (charging and communication), with charging protection function, supports USB hot-swapping
Data StorageRS485 signal output, integrated built-in printer, external wireless Bluetooth printer, one-touch SOS call, wind speed detection, differential pressure detection.
Environmental temperature and humidity detection: Temperature -40°C to +70°C, accuracy ±0.5°C; Humidity 0% to 100% RH, accuracy ±3% RH;
Wireless Data Transmission: RoLa module, Bluetooth module, WiFi module, 443M module, ZigBee module (free PC software/cloud platform/mobile app for remote data monitoring), GPRS wireless transmission (MQTT data transfer), RS485 interface;
Storage Function: Optional 16GB or larger capacity SD card storage;
Positioning Function: GPS positioning;
Protection ClassIP66
Explosion-proof TypeIntrinsically safe type
Explosion-proof MarkEx ia IIC T4 Ga 
Standards ApplicableGB 15322.3-2019 Portable Combustible Gas Sensors with a Measuring Range of 0-100% LEL;
GB 3836.1—2010 Electrical Apparatus for Explosive Gas Atmospheres—General Requirements;
GB 3836.4—2010 Electrical Apparatus for Explosive Gas Atmospheres—Intrinsically Safe Type ‘i’;
Dimensions255×210×125mm (L×H×W), Customized: 420×210×125mm (L×H×W)
Weight3.2Kg, Special customization is subject to actual weight.
Standard AccessoriesInstruction manual, certificate of conformity, warranty card, USB charger (including data cable), high-grade aluminum alloy instrument case, back clip, humidity and dust filter, 0.4-meter stainless steel sampling handle
Optional AccessoriesFilter tip: filters water vapor and dust; replace regularly according to site conditions; Imported high-temperature sampling handle: 400℃, 800℃, 1300℃ high-temperature sampling handle (enabling the detection of high-temperature sample gases);
Optional FunctionsRS485 signal output, integrated built-in printer, external wireless Bluetooth printer, one-touch SOS call, wind speed detection, and differential pressure detection.
Environmental temperature and humidity detection: Temperature -40°C to +70°C, accuracy ±0.5°C; Humidity 0% to 100% RH, accuracy ±3% RH;
Wireless Data Transmission: RoLa module, Bluetooth module, WiFi module, 443M module, ZigBee module (free PC software/cloud platform/mobile app for remote data monitoring), GPRS wireless transmission (MQTT data transfer), RS485 interface;
Storage Function: Optional 16GB or larger capacity SD card storage;
Positioning Function: GPS positioning;
Product Qualification CertificateCPA Type Approval for Measuring Instruments, Explosion-Proof Certification, ATEX Certification, CE Certification, Safety Integrity Level SIL3 Certification;
Design Patent Certificate, Computer Software Copyright Registration Certificate; 
Manufacturer Qualification CertificateUnits can be freely switched. For conventional gases, no molecular weight needs to be entered, but for special gases, the molecular weight needs to be entered, and the system will automatically calculate and switch. Selectable units include: PPM, mg/m3, Vol%, LEL%, PPHM, ppb, and mg/L.
VOC Gas Detector Details

Commonly detected gases

Detected GasesRange
Flammable Gas EX0-100%LEL、0-100%Vol
Methane CH40-100%LEL、0-100%Vol、0-1000ppm、0-10000ppm
Oxygen O20-30%Vol、0-100%Vol、0-5000ppm
Nitrogen N20-100%Vol
Carbon Monoxide CO0-100ppm、0-1000ppm、0-2000ppm、0-20000ppm、0-100000ppm
Carbon Dioxide CO20-500ppm、0-2000ppm、0-5000ppm、0-50000ppm、0-20%Vol、0-100%Vol
Formaldehyde CH2O0-10ppm、0-100ppm、0-1000ppm
Ozone O30-1ppm、0-5ppm、0-50ppm、0-100ppm、0-2000ppm、0-30000ppm
Hydrogen Sulfide H2S0-10ppm、0-50ppm、0-100ppm、0-2000ppm、0-10000ppm
Sulfur Dioxide SO20-10ppm、0-20ppm、0-100ppm、0-500ppm、0-2000ppm、0-10000ppm
Nitric Oxide NO0-10ppm、0-100ppm、0-2000ppm、0-5000ppm
Nitrogen Dioxide NO20-10ppm、0-100ppm、0-2000ppm、0-5000ppm
Nitrogen Oxides NOX0-10ppm、0-100ppm、0-2000ppm、0-5000ppm
Chlorine CL20-10ppm、0-20ppm、0-200ppm、0-2000ppm
Ammonia NH30-10ppm、0-100ppm、0-1000ppm、0-5000ppm、0-100%LEL
Hydrogen H₂0-100%LEL、0-1000ppm、0-20000ppm、0-40000ppm、0-100%Vol
Helium He0-100%Vol
Argon Ar0-100%Vol
Xenon Xe0-100%Vol
Hydrogen Cyanide HCN0-30ppm、0-100ppm
Hydrochloric Acid HCl0-20ppm、0-200ppm
Phosphine PH₃0-10ppm、0-100ppm、0-1000ppm、0-4000ppm
Chlorine Dioxide ClO₂0-1ppm、0-10ppm、0-200ppm
Ethylene Oxide ETO0-100ppm、0-1000ppm、0-100%LEL
Phosgene COCl₂0-1ppm、0-50ppm
Silane SiH₄0-1ppm、0-50ppm
Fluorine F₂0-1ppm、0-10ppm、0-50ppm
Hydrogen Fluoride HF0-10ppm、0-50ppm
Hydrogen Bromide HBr0-50ppm
Boron Hydride B3H60-10ppm
Arsenic Hydride AsH30-1ppm、0-10ppm、0-50ppm
Germanium Hydride GeH40-2ppm、0-20ppm
Hydrazine N2H40-1ppm、0-300ppm
Tetrahydrothiophene THT0-100mg/m3
Bromine Gas Br20-10ppm、0-100ppm、0-2000ppm
Acetylene C2H20-100%LEL、0-100ppm、0-1000ppm
Ethylene C2H40-100%LEL、0-100ppm、0-2000ppm
Ethanol C2H6O0-100ppm、0-2000ppm、0-100%LEL
Methanol CH4O)0-100ppm、0-2000ppm
Carbon disulfide CS20-50ppm、0-5000ppm
Acrylonitrile C3H3N0-50ppm、0-2000ppm
Methylamine CH5N0-50ppm
Iodine gas I20-50ppm
Styrene C8H80-10ppm、0-100ppm、0-200ppm、0-1000ppm、、0-5000ppm
Vinyl chloride C2H3Cl0-100ppm、0-1000ppm
Trichloroethylene C2HCl30-100ppm、0-1000ppm
Tetrachloroethylene C2Cl40-100ppm、0-1000ppm
Nitrous oxide N2O0-100ppm
Nitrogen trifluoride NF30-100ppm
Hydrogen peroxide H2O20-100ppm、0-1000ppm
Bromomethane CH₃Br0-100ppm、0-30000ppm、0-200g/m3
Sulfuryl fluoride SO₂F₂0-100ppm、0-5000ppm、0-10000ppm
Benzene C₆H₆0-10ppm、0-100ppm、0-1000ppm、0-10000ppm
Toluene C₇H₈0-10ppm、0-100ppm、0-1000ppm、0-10000ppm
Xylene C₈H₁₀0-10ppm、0-100ppm、0-1000ppm、0-10000ppm
VOC0-10ppm、0-100ppm、0-1000ppm、0-10000ppm
TVOC0-10ppm、0-100ppm、0-1000ppm、0-10000ppm
Non-methane total hydrocarbons C_xH_y0-10ppm、0-100ppm、0-1000ppm、0-10000ppm
Refrigerators0-1000ppm、0-2000ppm、0-5000ppm
Sulfur hexafluoride SF₆0-1000ppm、0-2000ppm、0-3000ppm

Technical Support

Methods for detecting volatile organic compounds (VOCs) mainly include electrochemical, infrared, catalytic combustion, thermal conductivity, and PID photoionization gas sensors. In the laboratory, gas chromatography-mass spectrometry (GC-MS), gas chromatography-flame photometry (GCFID), and gas chromatography-electron capture detection (GCECD) are also used, offering high precision and accurate qualitative analysis.

In ambient air, VOCs mainly originate from industrial waste gases from fuel combustion and transportation, vehicle exhaust, and photochemical pollution.

A VOC detector is a device designed to detect and measure the presence of VOCs in the air. It utilizes a gas-sensitive material that interacts with VOC molecules, causing a measurable change in conductivity or other physical properties. Three common VOC sensor technologies are: metal-oxide-semiconductor (MOS) sensors, photoionization detectors (PID), and infrared (IR) sensors.

For example, the photoionization detector (PID) principle relies on the specific reaction between ultraviolet (UV) light and volatile organic compounds (VOCs). When the sample gas passes through the PID detection chamber, a beam of high-energy UV light (typically 10.6 eV or 11.7 eV) illuminates these VOC molecules. This energy is sufficient to ionize the valence electrons of many VOC molecules, causing them to detach from the molecules and form positive ions and free electrons.

These newly generated ions and free electrons are accelerated in a strong electric field within the PID detection chamber, thus generating a weak current. The magnitude of this current is directly proportional to the concentration of VOCs passing through the detection chamber; that is, the higher the VOC concentration, the more ion pairs are generated, and the larger the current.

The precision circuitry inside the PID sensor measures this minute current and converts it into a readable, recordable concentration value, typically expressed in ppm (parts per million) or ppb (parts per billion).

Standard VOC detectors (especially the most commonly used PID sensors) are not effective at detecting the main components of natural gas. However, they can detect trace amounts of VOCs.

We advise against using VOC detectors (especially PID sensors) to detect natural gas leaks. This is a misuse of tools and a dangerous error. Always use a professional gas leak detector.

Confined spaces such as tanks, pipelines, and underground shafts often suffer from excessive VOC (volatile organic compound) concentrations due to poor ventilation. Toxic gases such as benzene, toluene, and formaldehyde can cause acute poisoning or even suffocation and death.

VOC detectors, through real-time monitoring, accurate early warning, and multi-gas compatibility, have become a core tool for preventing worker poisoning risks.

Before entering a confined space, a pump-suction four-in-one detector can be used to ensure the instrument’s accuracy and reliability. Inside the confined space, continuous monitoring is essential, paying attention to equipment alarms. Data should be saved for future work.

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VOC Gas Detectors, instruments specifically designed for monitoring VOC concentrations in the air, are increasingly becoming indispensable tools in environmental protection, industrial safety, and indoor air quality assessment.

Sino-Inst’s VOC Gas Detectors are available in handheld, portable, and stationary models. They support customized simultaneous detection of multiple gases. They provide parameters for factories to effectively control VOC emissions and ensure the safety of frontline personnel!

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