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Measuring Instruments for Indoor Environmental Quality

 

Indoor air quality refers to the air that occupies confined, non-industrial environments—whether private (housing, offices, car interiors) or public (public transport, public places, schools, etc.).

These indoor spaces are often found to be contaminated by many pollutants, and studies even show that indoor air pollution is up to 8 times greater than that of outdoor air. Why is indoor air quality important? We spend, on average, 80 to 90% of our time inside! So, although ignored for a long time, the question of indoor air quality has become one of the main environmental public health issues all over the world.

Temperature and humidity:
These levels can affect more than your comfort. High temperatures and excessive humidity promote mold and mildew growth. These in turn can cause structural damage to your home and cause allergy-like symptoms to those with sensitivities. Monitoring these levels can help you prevent home and health problems and tip you off to potential sources like foundation cracks or leaks and poor insulation.

Carbon dioxide:
While the effects of high levels of CO2 were long thought to be benign, research has found that concentrations as low as 1,000 ppm can affect people’s cognitive function and decision-making performance.

The greatest source of indoor CO2 is people themselves, as it’s a byproduct of our respiratory function. Coupled with poor ventilation, this commonly leads to high levels of CO2 in many homes.

VOCs:
The acronym stands for volatile organic compounds, gases emitted from a variety of materials that can have short- and long-term health effects. According to the Environmental Protection Agency, concentrations of many VOCs can be up to 10 times higher indoors than outdoors.

Sources of VOCs include many common household products, including hairspray, cosmetics, cleaning fluids, disinfectants, paints, and varnishes. Burning fuels like wood and natural gas also produces VOCs.

Formaldehyde is one of the most common VOCs and can be found in many building materials, including plywood, glues, and insulation. Formaldehyde is also used in some drapes and furniture fabrics. You can read more about formaldehyde and its sources in an article from the U.S. Consumer Product Safety Commission.

Short-term exposure to the low levels of VOCs can cause throat irritation, nausea, fatigue, and other minor complaints. Long-term exposure to high concentrations of VOCs has been linked to more severe respiratory irritation as well as liver and kidney damage. Products can emit VOCs even when they’re in storage, though to a lesser extent than when they’re actively being used.

PM level:
Particulate matter, or PM, is a mix of particles and droplets in the air. PM varies in shape and size, but those of 10 micrometers in diameter and smaller can adversely affect your health because they can be inhaled. PM2.5 refers to fine particulate matter—that with a diameter of two-and-one-half microns. PM1 is particulate matter measuring 1 micron.

Sufficient exposure to PM2.5 can irritate the eyes, nose, throat, and lungs, leading to allergy-like symptoms and shortness of breath in otherwise healthy people. It can also exacerbate existing medical problems, such as asthma and heart disease. The World Health Organization considers PM2.5 the world’s single biggest environmental health risk.

Indoor PM2.5 levels can be influenced by outdoor sources like vehicle exhaust, wildfires, and power plant emissions. But many indoor activities produce PM2.5 as well: Cooking, burning fireplaces, and smoking are just a few common sources.

Carbon monoxide: By now, most people are aware of the deadly effects of high concentrations of this odorless, colorless gas. But exposure to lower levels, sometimes given off by fuel-burning appliances, can also cause adverse reactions, including confusion and memory loss.

Lets not forget that a lot of people generally tend to disregard the dangers they don't   see.

Sigma Hellas is offering a big range of instruments for indoor air quality monitoring , so choose the ones that matter most to you.

IAQ-20
Ambient humidity & temperature meter with alarms logged

Description

This series is used to monitor ambient humidity & temperature. Large LCD displays readings, status, alarm information and real-time clock. User can configure with touch buttons alarm limits, backlight settings, sound alarm settings, etc.

Features and Functions
Range:          -30~65℃
0~100%RH
Resolution: 0.1℃
0.1%rh
Accuracy: ±0.3℃(-10~65℃) ±0.5℃(others)
±3%RH(10~90%RH) ±4%(others)
View history of maximum/minimum/average
High/low alarm user configurable
Real-time and history alarm status indications
Calendar supported and user configurable
Sound alarm supported
Large LCD display with backlight
Comfort level indications
℃/℉/Dew point
Battery status indication
Long battery life

Applications
This product is suitable for laboratory, scientific research, workplace, agriculture, horticulture, animal breeding, home / car / classroom monitoring.

 

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 people, including formaldehyde, TVOC, temperature, humidity, air quality index, carbon dioxide.

 

Sigma IAQ40

CO2+Temperature+Humidity with Data Logger (Sigma IQA40D)Environment Meter

A real-time monitoring instrument for temperature, humidity, and CO2. Through the professional detection of this series of products, they can guide the prevention and improvement of air quality and safety. This product is suitable for monitoring of home, car, classrooms, workplaces, environmental research and other comprehensive air pollution.

Features
● High-precision industrial sensors are used
● 32Bits ARM CPU to improve performance
● Sound alarm function
● Long term continuous environment detection
● built in rechargeable lithium battery
● High sensitivity and fast response speed
● LCD shows temperature, humidity, time and date
● Large STN backlit LCD

Technical Characteristics
Channels: Temperature, Humidity, CO2
Sensor type: Temperature: digital, Humidity: digital, CO2: IR
Range: Temperature: --40~80℃, Humidity: 0~100%rh, CO2: 0~9999ppm
Accuracy:Temperature ±0.5℃, Humidity ±3%rh, CO2 ±5%±50ppm
Resolution:Temperature 0.1℃, Humidity 0.1%rh, CO2 1ppm
Operational environment: 5~50℃, 10~90%RH, Standard air pressure
Size(mm): 126mm*84mm*36mm

Applications
This series of Sigma IAQ monitoring products can detect environmental parameters closely related to the health of people, including temperature, humidity, carbon dioxide.

Sigma IAQ310

PM2.5, PM1.0, PM10, Temperature, Humidity Meter

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

Specifications
Range/Accuracy: Temperature -40..80℃ / ±0.5℃
Humidity 0~100%rh / ±3%rh
PM2.5 0~999ug/m³ / ±10%
PM1.0 0~999ug/m³ / ±10%
PM10 0~999ug/m³ / ±10%
Size(mm): 126mm*84mm*36mm

Applications
This series of Sigma IAQ monitoring products can detect environmental parameters closely related to the health of people, including temperature, humidity, PM2.5, PM1.0, PM10.

Model 625 - for measurements of ambient relative humidity and temperature

a humidity/temperature measuring instrument, incl. plug-in humidity probe head, battery and calibration protocol

The compact instrument with built-in humidity probe head for measuring air moisture and temperature. The large 2 line display shows humidity, wet bulb temperature or dewpoint as well as temperature. When measuring at hard-to-access points, the humidity probe head can be easily removed and attached to the handle via the probe cable (accessory). Alternatively, the readings can be transmitted wirelessly over wide distances from the probe to the measuring instrument. To do this, the humidity probe head is attached to the radio handle (accessory) and the radio module (accessory) is added to model 625.

Displays temperature and relative humidity / wet bulb temperature / dewpoint
Max./min. values
Hold button to freeze readings
Display light
Auto Off function
TopSafe, the indestructible protection case (optional)
Patented humidity sensor
2 year guaranteed long-term stability
TopSafe, instrument protection against dirt and knocks

Technical

Storage temperature -40 to +85 °C
Operating temperature -20 to +50 °C
Battery type 9V block battery, 6F22
Battery life 70 h (without radio operation)
Weight 195 g
Dimensions 182 x 64 x 40 mm
Material/Housing ABS
Probe type NTC
Meas. range -10 to +60 °C
Accuracy ±0.5 °C
Resolution 0.1 °C
Probe type Type K
Meas. Range -200 to +1370 °C
Resolution 0.1 °C
Probe type humid. sensor, cap.
Meas. Range 0 to +100 %RH
Accuracy ±2.5 %RH (+5 to +95 %RH)
Resolution 0.1 %RH

model 425 - for measurements of ventilation quality

model 425, is a thermal anemometer with permanently attached flow probe (∅ probe head 7.5 mm), incl. temperature measurement and telescopic handle (max. 820 mm), battery and calibration protocol

The compact model 425 anemometer with permanently attached thermal flow probe (probe head ∅ 7.5 mm) incl. telescopic handle. Volume flow is shown directly in the display. Accurate volume flow calculation thanks to easy input of duct area. In addition, it is also possible to switch to the current temperature reading. Timed and multi-point mean calculation provide information on mean volume flow, flow speed and temperature reading. Min/max values can also be shown in the display. The Hold function makes it possible to freeze current readings in the display.

Temperature, flow and volume flow measurement
Multi-point and timed mean calculation
Max/min values
Hold button to freeze readings
Display light
Auto Off function
TopSafe, the indestructible protective case (optional)
TopSafe, instrument protection against dirt and knocks

Technical

Storage temperature -40 to +85 °C
Operating temperature -20 to +50 °C
Battery type 9V block battery, 6F22
Battery life
20 h
Weight 285 g
Dimensions 182 x 64 x 40 mm
Material/Housing ABS
Probe type NTC
Meas. range -20 to +70 °C
Accuracy ±0.5 °C (0 to +60 °C)
±0.7 °C (remaining range)
Resolution
0.1 °C
Probe type Thermo
Meas. Range 0 to +20 m/s
Accuracy ±(0.03 m/s +5% of mv)
Resolution 0.01 m/s

Model 435

- the multifunction instrument for measurement of every application in buildings, air conditioning and ventilation.

The Model 435 allows indoor air analysis. This serves both as an indicator of human well-being and as a decisive and important factor in storage and production processes. Moreover, indoor air quality (IAQ) informs whether the air conditioning / ventilation provides optimal energy use.

To determine the indoor air quality the available measurement parameters are CO2, relative humidity and indoor air temperature. In addition to these we can also measure absolute pressure, turbulence (air flow), the light intensity (Lux), the coefficient U (U-value) and the surface temperature.

An extensive selection of sensors is available for this purpose:It covers all the necessary parameters for conditioning technology: flow velocity, humidity, temperature, pressure, absolute pressure, Lux and CO 2, with optional wireless or conventional sensors with cable connection. Perfection to the last detail with the well known quality instruments that we provide.

480 - The Ultimate in Accurate Indoor Climate Measurement

A comfortable environment indoors is a key factor to productivity at the office, health at home, and safe storage at an industrial location. When adjustments are required, HVAC professionals work to identify problems quickly, so that indoor conditions are adjusted and comfortable once again.
The 480 IAQ Pro is the latest in cutting-edge measurement technology providing the most accurate indoor climate measurements, like temperature, humidity, CO2, airflow and even light.

Cutting-edge technology for professional air-conditioning engineers

The 480 provides support to consultants, experts, technical service providers and service technicians in the field of ventilation and air conditioning, for all measuring tasks. With this one measuring instrument and its digital probes, you can record parameters such as flow, temperature, humidity, pressure, illuminance, radiated heat, degree of turbulence and CO²

If it is too hot in the workplace or if there is a draught, then the air-conditioning/ventilation system is probably not correctly adjusted. With the new VAC measuring instrument 480, you can now adjust ventilation and air-conditioning systems in compliance with the standards quickly and easily. Record all relevant climatic parameters in residential and office areas in an instant.

The intelligent probes mean that you are equipped for any application and guaranteed completely reliable measuring results. Deviations are automatically eliminated following calibration. You obtain a zero-error display. The probes notify 480 as soon as the next calibration is due.

Advantages of the 480 IAQ Pro
• Reliable Measurements
The perfect combination of a highly accurate, rugged hand-held instrument and a wide variety of probes to meet the needs of
HVAC and T&B professionals.
• Save Calibration Time
Intelligent probes retain calibration information and increase productivity in the field.
• Manage Data
Use the easy software to simplify data handling of large jobs and maintain stored profiles.
• Save Time
Perform multiple measurements simultaneously.
Probe Variety
Choose from a wide selection of probes to match any measurement need.
• SD-card and USB-interface for simple, flexible data exchange.
• Save energy costs by having HVAC systems that are adjusted efficiently.
• Optimise the comfort level in living quarters and workplaces.
• Save time with the trackpad and graphics display.
• Impress your customers with fast, on-site measuring results, analyses and reports.

Ιndoor climate monitors

- using the most advanced technology available today.

Temperature, barometric pressure and humidity are shown simultaneously on one easy-to-read display. Monitor your wine cellar, greenhouse or any other climate dependent area. Racers can calculate the air density index to accurately tune the car`s carburator. Requires virtually no installation. Comes complete with power adapter and detailed instruction book.

Available in versions:
EU (Europe) radio frequency 868 MHz (on units equipped with wireless transmission) Station reports in Metric units
US (United States) uses US radio frequency from 902 to 928 MHz (on units equipped with wireless transmission) Station reports in US standard units

The console provides A/D conversion, calculations, and data display. A DC-power adapter is included. Αn optional feature, provides data logging and a serial interface to a computer.

General
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . -20° to 60° C (-5° to 140° F)
Display Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to 60° C (32° to 140° F)
Supply Power (adapter included) . . . . . . . . . . . . . . . . . . . 16 mA (typical) at 10 to 16 V (100 mA when display is illuminated)
Housing Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Black ABS plastic
Display Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LCD
Dimensions
Console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 mm x 137 mm x 76 mm (5.25" x 5.4" x 3.0")
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 mm x 48 mm (4.4" x 1.9")
Weight, total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.53 kg (3 lbs. 6 oz.)

Data Displayed On Console
All data display categories are displayed in alphabetical order:
Barometric Pressure (sensor located inside console)
Resolution and Units . . . . . . . . . . . . . . . . . . . . . . . .Measured in 0.01" Hg. Other units are converted from Hg and rounded
to nearest 0.1 mm, 0.1 hPa, 0.1mb.
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26.00" to 32.00", 660.0 to 810.0 mm, 880.0 to 1080.0 hPa
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.05", ±1.3 mm, ±1.7 hPa (at room temperature)
Trend (change in 1 hour) . . . . . . . . . . . . . . . . . . . . . . . . . ±0.2", ±5.0 mm, ±7.0 hPa
Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Current Barometric Pressure, Current Barometric Pressure Trend, Stored Barometric Pressure Reading
General
Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 seconds
Times and Dates of Maximum and Minimum Values . . . . Stored with value
Inside Temperature (Ai r ) (sensor located inside console)
Resolution and Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 or 0.1°F or 1 or 0.1°C.°. Celsius is converted from Fahrenheit
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32° to 140° F (0° to 60° C)
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1°F (±0.5°C)
Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Current Temperature (high and low alarms), Maximum and Minimum Temperatures, Relative Humidity
Resolution and Units . . . . . . . . . . . . . . . . . . . . . . . . 1%
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 to 90% RH
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5%
Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Current Inside Relative Humidity (high and low alarms), Maximum and
Minimum Relative Humidity Values
Time
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±15 seconds/month
Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Current Time, Current Date

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