As the years are passing, more and more people are spending most of their time indoors and thus having the environmental conditions in those closed spaces seriously affecting our health.

as the name implies, simply refers to the quality of the air in an office or other building environment. "Sick Building Syndrome" is a term many people use to convey a wide range of symptoms they believe can be attributed to the building itself. Workers typically implicate the workplace environment because their symptoms are alleviated when they leave the office. Indoor environmental contaminants can originate within the building or be drawn in from outdoors. If contaminant concentrations are excessive, IEQ problems can arise, even if the HVAC system is properly designed and well-maintained. Investigators have found IEQ problems caused by ventilation system deficiencies, overcrowding, offgassing from materials in the office and mechanical equipment, tobacco smoke, microbiological contamination, and outside air pollutants. Maintaining a healthy and comfortable indoor environment in any building requires an assessment and thereafter the integration of sensors and controls for permanent monitoring.

Indoor environment problems are preventable and solvable.

Sigma IAQ500
Monitoring Indoor Carbon dioxide, pollution, formaldehyde, temperature and humidity

Sigma IAQ500 is a real-time monitoring instrument for PM2.5, formaldehyde, temperature, humidity, CO2. Through the professional detection of this series of products, users can guide the prevention and improvement of air quality and safety. This device is suitable for monitoring at home, car, classrooms, workplaces, environmental research and other comprehensive internal air pollution applications.

Features
● High-precision industrial sensors
● 32Bits ARM CPU to improve performance
● Sound alarm function
● Long term continuous environment monitoring
● built in rechargeable lithium battery
● High sensitivity and fast response
● LCD displays temperature, humidity, time and date
● Large STN LCD with backlight

Technical Characteristics
Channels: Temperature, Humidity, HCHO, PM2.5, CO2
Sensor type: Temperature: digital, Humidity: digital, HCHO: electrochemical , PM2.5: Laser, CO2: IR
Range: Temperature: --40~80℃, Humidity: 0~100%rh, HCHO: 0~2mg/m³, PM2.5: 0~999ug/m³, CO2: 0~9999ppm
Accuracy:Temperature ±0.5℃, Humidity ±3%rh, HCHO 0.03mg/m (<0.3mgm=''>=0.3mg/m), PM2.5 ±10%, CO2 ±5%±50ppm
Resolution:Temperature 0.1℃, Humidity 0.1%rh, HCHO 0.001mg/m³, PM2.5 1ug/m³, CO2 1ppm
Operational environment: 5~50℃, 10~90%RH, Standard air pressure
Size(mm): 126mm*84mm*36mm

Applications
This series of IAQ monitoring products can detect environmental parameters closely related to the health of humans, including formaldehyde, TVOC, temperature, humidity, air quality index, carbon dioxide.

Model Sigma 2000 - Portable single or multiple (up to 5) gases detector

Gas Detectors with integrated suction pump

Compact Quick response and high precision device. With built-in suction sampling pump, fast sampling rate and high flow rate, the probe response time is ensured. Unique design, compact size and easy to carry. High strength plastic mechanical housing suitable for different applications and environments.

Specifications
Sensors: Electrochemical, Non Dispersive Infrared (NDIR). Catalytic
Sampling: With internal sampling pump (up to 1L / min)
Accuracy: ± ± 3% F.S. (optionally better accuracy)
Response time: ≤10S
Zero offset: ± ± 1% (F.S. / year)
Display: LCD dot matrix, with gas type display, real-time gas concentration, battery power, time, gas unit.
Temperature: -20 ℃ ~ 50 ℃
Humidity: 0-95% RH (without condensation)
ExibⅡCT4
Degree of protection IP65
Sound alarm: 85dB
Optical alarm: LED, low alarm: blue, high alarm: red
Vibration: the detector will vibrate when it is turned on
The alarm point is adjusted according to customer requirements.
Battery: 3.6V 2300mAh Lithium Polymer Rechargeable Battery, running time is about 12 hours continuously, charging time: 4-6 hours
Dimensions: 205x75x32mm
Weight: 330g
Warranty: 12 months

Partial list of detectable gases

HANDHELD INSTRUMENT FOR MEASURING & RECORDING INDOOR AIR QUALITY

Multi-parameter model 435 IAQ Monitor can be your valuable tool for indoor environmental quality assessment.

The 435 is the latest generation of multi-function instruments. A compact versatile handheld instrument for the measurement and recording of Indoor Air quality parameters including Carbon Dioxide (CO2), relative humidity and room air temperature are available for evaluating indoor air quality. Additionally, absolute pressure, draught, lux and surface temperature can be determined. Upto 8147 readings can be taken at logging intervals from 1 sec to 1 hour +. To determine volume flow, all the possibilities of flow measurement are available, such as thermal probes, vane probes and Pitot tubes.

Naturally single parameter handheld instruments for ambient temperature, thermal comfort (black ball temperature), relative humidity & dew point, air velocity, carbon dioxide, noise, lux, pressure and many others are also available.