Indoor Air Quality

Electrochemical IAQ Sensor
Solid-state electrochemical gas sensor is now available in WOOFAA Cee, a wireless indoor air quality monitor, as an optional sensor item. This page illustrates the data measuring excellence with this advanced high polymer technology from Germany.
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Solid-state Electrochemical Gas Sensor

Competence Overview

Apart from a compact size, long product life and low cost versus conventional liquid-state electrochemical sensor, our solid-state sensor also has these advantages:

  • Industrial grade precision (accuracy, repeatability & linearity), superior performance above all semiconductive and MEMS type sensors
  • PPB (parts-per-billion) resolution, against to PPM (parts-per-million) on semiconductive and MEMS type sensors
  • Less data drifting over time, no calibration is ever needed over its product life
  • Faster response time, quicker zero recovery, no warm-up time due to its low temperature resistance
  • Immunes towards electromagnetic interference, resulting a lower-cost hardware construction to work with AC power supply and WIFI signals on the same PC board
  • Works well in very dry ambient, as the high polymer file is insensitive to humidity changes
  • Works well in vacuum or anoxic ambient
  • Compact size
  • One-third or one-fourth of price to conventional liquid-state electrochemical type sensors
  • Compliance:
    • RoHS
    • EMC: EN55022 and FCC
    • EU 2002/231/CE Directive
    • EN 13779:2007
    • GB 12358:2006
    • GB 50325:2010
    • GB 3095:1996
    • GB/T 18883:2002
    • TW Indoor Air Quality Standards

Standard Factory Test

Proprietary sensor calibration and baseline adjustment method, appliance and software tools

WOOFAA Cee Offers Configurable Sensor Options as per Your Project Needs

Simple Indoor Air Quality Monitoring

Know What is in You Are Breathing

Model WF2CW-J1000, saves the fuss of quantifying individual gas concentration, gives you an indicative figure on how good or how bad is your IAQ. The IAQ-10 sensor measures the combined effect of gases like: Formaldehyde (HCHO), Methanol (CH3OH), Toluene (C7H8), Sulfur Dioxide (SO2), Carbon Monoxide (CO), Hydrogen Sulfide (H2S), Methyl Mercaptan (CH4S), hundreds of allergic/toxic gases of hydrocarbons (CH) and Sulfur Oxides (SOx).
  1. General IAQ upto 10 ppm
  2. Indoor Air temperature
  3. Indoor Relative humidity

Industrial Applications

Model WF2CW-J3000, monitors general indoor air quality in industrial environment where excessive gaseous contaminants are inevitable. This monitor helps to log the intensity and durability of indoor air pollution. Monitoring parameters:
  1. General IAQ upto 200 ppm
  2. Indoor Air temperature
  3. Indoor Relative humidity
Solid-state Electrochemical Gas Sensor: General IAQ

Linearity Test

Typical test result: within ± 5% deviation on all checkpoints, within ± 3% deviation in measure range 0~5 ppm. 

Solid-state Electrochemical Gas Sensor: General IAQ

Zero-point Stability Test

Conventional semi-conductive and liquid-state electrochemical type sensors are often subjected to data drift even in non-conteminated environment, yeilding shift of baseline and inaccurate measures.

Our solid-state IAQ sensors are tested in a contant blow of fresh air for 12 hours, showing a baseline shift < 50 ppb, while the conventional senosrs types often go above 300 ppb.

Solid-state Electrochemical Gas Sensor: General IAQ

Conformance Test

How a group of sensors measure on a fixed concentration of span gas? This test is to find the answer and to screen out the incompetent.

While any other semiconductive and MEMS types gas sensor fail (deviation greater than 5%), our IAQ sensor all fall within 100 ppb in a full-scale measure of 10,000 ppb, which is less than 1%.

Solid-state Electrochemical Gas Sensor: General IAQ

Stability Test

How a group of sensors measure over a discontinuous change of contaminant concentration? This test is to find the answer and to screen out the incompetent.

While any other semiconductive and MEMS types gas sensor fail (deviation greater than 1%), our IAQ sensor all fall within 100 ppb in a full-scale measure of 10,000 ppb, which is less than 1%.

Solid-state Electrochemical Gas Sensor: General IAQ

IAQ Sensor Specifications

Two measuring range options are available for the IAQ sensors:

Code  | Range | Resolution
  • X_J1 | 0.01~10 ppm | 1 ppb
  • X_J3 | 1~200 ppm | 100 ppb