LBT-VOC-1000 Formaldehyde and VOC Emission Testing Chamber
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Description
Product Introduction:
This instrument is primarily used for the determination of free formaldehyde in consumer products such as wood products, furniture, flooring, carpets, footwear, and building and finishing materials.
Standard‑size test specimens are placed in a test chamber where temperature, humidity, air velocity, and air exchange rate are maintained at specified levels. Formaldehyde is released from the specimens and mixes with the chamber air; air samples are periodically drawn from the chamber, passed through an aqueous scrubber, and analyzed to determine the formaldehyde concentration absorbed by the water. The formaldehyde concentration in the chamber air is calculated from the formaldehyde concentration in the scrubber solution and the volume of air sampled, expressed in milligrams per cubic meter (mg/m³). Sampling is conducted at regular intervals until equilibrium is reached in the chamber.
Product Features:
● Program-controlled automatic timed sampling requires no manual intervention; once sampling is complete, simply remove the sample vial and proceed to the next step of chemical analysis.
● Temperature and humidity are controlled in tandem, preventing condensation.
● Hot-and-cold counter‑current temperature‑control tank: stable temperature regulation;
● Imported humidity and temperature sensor: high measurement accuracy and stable performance;
● High-quality chiller: imported compressor, ensuring stable operation and long service life;
● Protection devices: Both the climate chamber and the dew-point water tank are equipped with high- and low-temperature alarm protection as well as high- and low-water-level alarms.
● Protection features: The compressor is equipped with overheating, overcurrent, and overpressure protection, ensuring safe and reliable operation of the entire unit.
● Stainless steel inner chamber: The interior of the constant‑temperature chamber is constructed from mirror‑finished stainless steel, offering a smooth surface that prevents condensation and does not adsorb formaldehyde, thereby ensuring measurement accuracy.
● The incubator’s insulation material is environmentally friendly and does not emit formaldehyde. Inside the chamber, a forced-air circulation system generates circulating airflow to ensure uniform and consistent temperature and humidity throughout.
● An electronic flow meter is used to regulate flow, ensuring precise and stable control.
● Program-controlled, with automatic sampling; the sampling time and sampling interval can be set according to the test standard.
Reference standard:
GB 18580—2017 “Formaldehyde Emission from Man-made Boards and Their Products”
GB 18587—2001 “Limits on the Release of Harmful Substances from Carpets, Carpet Backings, and Carpet Adhesives Used in Interior Decoration and Renovation”
ASTM D6007–02 “Standard Test Method for Determining Formaldehyde Concentration in Gases Emitted from Wood Products Using a Small-Scale Environmental Chamber”
ENV717-1 “Determination of Formaldehyde Emission from Wood-Based Panels—Environmental Chamber Method”
EN 13419-1 “Determination of VOC Emissions from Building Products — Part 1: Method Using an Environmental Chamber for Emission Testing”
HJ 571-2010 “Technical Requirements for Environmental Label Products: Man-made Boards and Their Products”
HJ 566-2010 “Technical Requirements for Environmental Label Products: Wooden Toys”
HJ/T 400 “Sampling and Determination Method for Volatile Organic Compounds and Aldehydes/Ketones in Vehicle Interiors”
GB/T 31107 “General Technical Requirements for Climate Chambers Used in the Detection of Volatile Organic Compounds in Furniture”
HJ 2547 “Technical Requirements for Environmental Label Products: Furniture”
GB 18584 “Limit for Harmful Substances in Wood Furniture for Interior Decoration and Renovation” (Latest Edition)
LY/T 1980 “Test Chamber for the Determination of Volatile Organic Compounds (VOCs) and Formaldehyde Emissions”
LY/T 1981 “Test Chamber for the Gas-Phase Determination of Formaldehyde Emission”
Requirements specified in LY/T 1982 “Large Climate Chamber for Testing Formaldehyde Emission from Wood-Based Panels and Their Products”
ASTM D 5116 “Standard Guide for Determining the Release of Organic Compounds from Indoor Materials and Products Using a Small-Scale Environmental Chamber”
ASTM D 6330—Standard Test Method for Determining the Release of VOCs (excluding formaldehyde) from Wood-Based Panels in a Small Environmental Chamber under Controlled Test Conditions
ENV 13419—“Building Products — Determination of VOC Emission — Part 1: Release Test Chamber Method”
HJ/T 400 “Sampling and Determination Method for Volatile Organic Compounds and Aldehydes/Ketones in Vehicle Interiors”
ANSI/BIFMA X7.1, “Standard for Formaldehyde and TVOC Emissions from Low-Emission Office Furniture and Seating,” ISO 16000‑9, “Determination of Volatile Organic Compounds Emitted by Building Products and Furniture,” ASTM D 6400, and other standards.
Technical specifications:
| Project | Content Description |
| Around the equipment | The airflow around the equipment is unobstructed, with no high-concentration dust and no corrosive or flammable/explosive gases. |
| Ambient temperature | 5–35°C |
| Relative humidity | ≤85%RH |
| Nominal capacity | 1080 L (excluding the heat exchanger fan, which occupies 1 cubic meter, thereby meeting the specimen‑placement requirements specified in GB 18580) |
| Inner box dimensions | W 1000×H1000×D 1000 mm |
| External dimensions | W 1150×H1800×D1600 mm |
| Rate of temperature change | The rate of temperature change complies with the relevant standards. |
| Temperature range | 10℃～40℃ |
| Temperature control accuracy (8 | ≤±0.5℃ (under no-load steady-state conditions, the temperature fluctuation at the center point of the working space is half of the measured maximum–minimum temperature difference) |
| Humidity range | 40–80% RH |
| Humidity control accuracy | ±3% R.H |
| Air exchange rate | 0.2–2 ± 0.03 times (1/h), adjustable |
| Airflow velocity | 0.1–0.3 (m/s) |
| Background value | Formaldehyde ≤ 0.006 mg/m³, TVOC ≤ 0.02 mg/m³; benzene, toluene, xylene, and other individual compounds ≤ 0.002 mg/m³. |
| Sealing performance | The hatch is self-sealing: ① At a positive pressure of 1 kPa, the cabin air leakage rate is less than 10⁻³ m³/min; ② The difference in gas flow between the inlet and outlet is less than 1%. |
| Cabin pressure | Relative to the ambient atmospheric pressure: 10 ± 5 Pa |
| VOC measurement range | 0-10PPM |
| Formaldehyde downstream analysis | Spectrophotometer, water bath, reagents, glassware, standard solutions, balance (optional); |
Structural features:
| Thermal envelope | Exterior wall material: Double-sided galvanized steel sheet with a high-grade powder-coated finish. Inner wall material: 304 stainless steel plate, fully welded; the inner surface is smooth and even, with uniform coloration, free from substrate exposure, delamination, blistering, or scratches. All edges and corners are rounded to facilitate water‑based cleaning. Overlapping joints between inner wall panels are sealed by seamless welding, with the welds and surrounding areas polished to eliminate deformation. Post‑welding, no volatile organic compounds (VOCs) or formaldehyde remain. The welding materials, sealing compounds, and other components that come into contact with the air inside the test chamber are all non‑emitting and non‑adsorbing of VOCs and formaldehyde, ensuring no interference with testing. Box insulation material: rigid PU foam with ultra-fine glass wool; insulation layer thickness: 80 mm. |
| Window | Single-door Observation window with electric heating and anti-condensation insulated glass, mounted on the door. Dimensions: 300 mm × 400 mm. Door frame equipped with an anti-condensation electric heating device. |
| Control Panel | Temperature (and humidity) control display, over-temperature protection setting device, emergency stop switch, running indicator light, fault indicator light, operation buttons, lighting switch |
| Mechanical Room | The mechanical room houses: a chiller unit, a condensate drainage system, fans, and an electrical distribution and control cabinet. |
| Distribution Control Cabinet | Cooling fan, buzzer, power distribution board, USB port Main power leakage circuit breaker |
| Temperature-controlled box heater | Stainless Steel Armored Heater Heater control method: contactless, equal‑period pulse width modulation, SSR (solid‑state relay) |
| Humidifier | Humidification method: surface evaporation using distilled water. Humidifier body material: stainless steel armored casing Humidifier control method: contactless, periodic pulse-width modulation, SSR (solid-state relay) Humidifier unit: water-level control device, heater dry-run protection device |
| Ventilation and Purification Unit | The silent‑type air pump supplies air, which passes through a high‑temperature combustion chamber. The central portion of this chamber is constructed from heat‑resistant materials and houses annular, hollow electric heating elements. A thermal insulation layer and stainless steel encase the refractory material around the perimeter of the chamber. Air flows steadily through the heating duct, reaching temperatures of 200–800°C; the exact temperature can be freely adjusted to meet specific requirements. This elevated combustion ensures the complete oxidation of harmful and toxic substances as well as associated organic compounds in the air, converting them into fine carbon particles and achieving thorough air purification. Consequently, the accuracy of experimental results is safeguarded, even when the incoming fresh air contains trace levels of hazardous contaminants exceeding regulatory limits. Air filtration after degradation After high‑temperature combustion, the fresh air no longer contains harmful organic compounds such as formaldehyde and VOCs; however, it may still contain some post‑combustion carbon particles and dust. The equipment is equipped with a dedicated filter designed to remove these carbon particles and particulate matter from the exhaust air. When the filter becomes clogged after prolonged use, the system automatically triggers an alarm, prompting the user to remove, clean, or replace the filter. At this point, the air purification process is complete. Air exchange rate (adjustable): 0.2–2 times per hour, controlled by electronic automatic servo‑type flow regulation. |
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