Interested in people counting sensors? Read about the technology driving it here >>

  • Home
  • About Us
  • Resource Centre
  • News
1300 768 887
OneTemp
  • Products
    • By Measurement
      • Air Flow
      • CO2
      • Humidity
      • pH
      • Pressure
      • Temperature
      • Shop All
    • By Product Type
      • Controllers
      • Data Loggers
      • Infrared
      • Kits & Systems
      • Recorders
      • RTD Sensors
      • Test & Measure
      • Thermocouples
      • Shop All
    • By Environment
      • Climate Controlled
      • Indoor
      • Outdoor
      • Underwater
      • Shop All
    • Take your monitoring to the next level with HOBO's MX800 Multiparameter Water Quality Data Loggers
  • Applications
    • Building Performance
      • Air Quality
      • Energy/Power
      • HVAC
      • Warehousing
    • IoT
      • eze Systems
      • HOBO Monitoring
      • Milesight Solutions
      • Monnit Solutions
    • Food & Beverage
      • Cold Storage
      • Temperature Profiling System
      • Shipment Monitoring
      • Temperature Monitoring
    • Outdoor
      • Agriculture
      • Compost Monitoring
      • Irrigation
      • Weather
    • Water
      • Water Quality
      • Water Level
      • Water Current
      • Water Analysis
      • Wastewater
    • Pharmaceuticals
      • Fridge/Freezer Monitoring
      • Shipment & Storage Monitoring
    • Infrared
      • Handheld Infrared
      • Thermal Imaging
  • Manufacturers
    • A-D
      • Additel
      • Apera Instruments
      • Benetech
      • Calex Infrared
      • CDI Meters
      • Celduc
      • Continental Control Systems
      • CS Instruments
      • Datapaq
      • Davis Instruments
    • E-K
      • eze System
      • Fluke Process Instruments
      • Gas Detection Australia
      • Graphtec
      • Hauber Electronik
      • HOBO Data Loggers
      • Horiba
      • Intech Instruments
      • InTemp
      • Jumo
      • Kimo Instruments
    • L-P
      • Land
      • Lowell Instruments
      • Magnelab
      • Milesight
      • Monnit
      • Novus
      • pHionics
      • Pixsys
      • PR Electronics
      • Procon Electronics
    • S-Z
      • Sauermann
      • Sensor Temp
      • Sfere
      • Shaw Moisture Meters
      • Shimaden
      • Tempmate
      • Tempsens
      • Tzone
      • Ventilation Control Products
      • ZyTemp
  • Home
  • About Us
  • Resource Centre
  • News
  • Products
    • By Measurement
      • Air Flow
      • CO2
      • Humidity
      • pH
      • Pressure
      • Temperature
      • Shop All
    • By Product Type
      • Controllers
      • Data Loggers
      • Infrared
      • Kits & Systems
      • Recorders
      • RTD Sensors
      • Test & Measure
      • Thermocouples
      • Shop All
    • By Environment
      • Climate Controlled
      • Indoor
      • Outdoor
      • Underwater
      • Shop All
    • Take your monitoring to the next level with HOBO's MX800 Multiparameter Water Quality Data Loggers
  • Applications
    • Building Performance
      • Air Quality
      • Energy/Power
      • HVAC
      • Warehousing
    • IoT
      • eze Systems
      • HOBO Monitoring
      • Milesight Solutions
      • Monnit Solutions
    • Food & Beverage
      • Cold Storage
      • Temperature Profiling System
      • Shipment Monitoring
      • Temperature Monitoring
    • Outdoor
      • Agriculture
      • Compost Monitoring
      • Irrigation
      • Weather
    • Water
      • Water Quality
      • Water Level
      • Water Current
      • Water Analysis
      • Wastewater
    • Pharmaceuticals
      • Fridge/Freezer Monitoring
      • Shipment & Storage Monitoring
    • Infrared
      • Handheld Infrared
      • Thermal Imaging
  • Manufacturers
    • A-D
      • Additel
      • Apera Instruments
      • Benetech
      • Calex Infrared
      • CDI Meters
      • Celduc
      • Continental Control Systems
      • CS Instruments
      • Datapaq
      • Davis Instruments
    • E-K
      • eze System
      • Fluke Process Instruments
      • Gas Detection Australia
      • Graphtec
      • Hauber Electronik
      • HOBO Data Loggers
      • Horiba
      • Intech Instruments
      • InTemp
      • Jumo
      • Kimo Instruments
    • L-P
      • Land
      • Lowell Instruments
      • Magnelab
      • Milesight
      • Monnit
      • Novus
      • pHionics
      • Pixsys
      • PR Electronics
      • Procon Electronics
    • S-Z
      • Sauermann
      • Sensor Temp
      • Sfere
      • Shaw Moisture Meters
      • Shimaden
      • Tempmate
      • Tempsens
      • Tzone
      • Ventilation Control Products
      • ZyTemp
    • My account
    • Quote
    • Cart
←
→
  • OVERVIEW

    Duct Air Quality (VOC) Transmitter QDT 24

    The duct air quality (VOC) transmitter QDT 24 provides reliable solutions for energy management through Demand Control of Ventilation (DCV) systems in buildings.

    The self-calibrating microprocessor-controlled duct air quality transmitter QDT 24 is used to determine the air quality on basis of a mixed gas sensor / VOC sensor
    (VOC = volatile organic compounds).

    Duct Air Quality transmitter QDT 24 is used for:

    – Air quality measurement in offices, hotels, meeting rooms and convention centres, apartments, stores, and restaurants, etc.

    – Quantitative evaluation of room air pollution with contaminating gases such cigarette smoke, body perspiration, exhaled breathing air, solvent vapours, emissions from building members and cleaning agents.

    – Adjustable sensitivity regarding the maximum air contamination to be expected.

    – For room ventilation as-needed, enabled by air changes only taking place when air is polluted while conserving energy at the same time.


     

    Room air quality is understood as subjective air quality, felt by human beings with their olfactory organs.

    As perception varies from person to person and therefore, air quality is assessed differently, a general definition of criteria for room air quality is not possible.

    By linearising and high operating temperatures, the air quality sensor achieves marginal drift and good stability.

    The sensor is automatically self-calibrating.

    The air quality sensor does not trace the concentrations of individual gases,
    but assesses the mixed gas as such, i.e. gas concentrations are not measured selectively.

    Therefore, it is not possible to specify gas concentrations by the unit ppm.

    Detectable gases: mixed gas, vapours of alcanoles, cigarette smoke, automobile exhaust gases, exhaled breathing air, combustion smoke (from wood, paper, plastics).

    In addition, compounds of alkanes, alkenes, aromats, terpenes, halogenated hydrocarbons, esters, aldehydes and ketones as well as native VOCs such as terpenes and isoprene are ranking among volatile organic compounds VOC.

    VOCs also evaporate from chemical products used in construction such as coating compounds, adhesives, or sealing compounds, furnishing objects, cleaning and care products, office chemicals and floor carpeting.

    The sensor’s service life is depending on the type of burden and gas concentration and is more than 60 months under normal load conditions.

    The new design implies the alternative to choose between three sensibility ranges by means of DIP switches, comparable to three measuring ranges: LOW for low, MEDIUM (default, equivalent to the hitherto existing type of this device) for medium, and HIGH for high noxious gas contaminations.

  • SPECIFICATIONS

     

    Sensor
    VOC sensor (metal oxide) with automatic self-calibration

    Sensor protection
    sinter filter, exchangeable, screwed, easy to clean

    Measuring range
    0-100% air quality referred to calibration gas multi-range switching
    (selectable DIP switches) VOC: LOW – MEDIUM – HIGH

    Measuring accuracy
    +/- 20% EW of final value (referred to calibration gas)

    Power supply
    24 Vac/dc

    Output(s)
    0-10 Vdc or 4-20 mA (selectable)
    and potential-free changeover contact
    (24V)switch point adjustable from 0-100% of the output signal.

    Ambient temp.range
    -10 to +60°C

    Warm-up period
    1 hour

    Response time
    < 10 s. minimum flow rate 0.2-0.5 m/s

    Housing
    Plastic, material polyamide 30%
    glass-globe-reinforced with quick-locking screws,
    72 x 64 x 37.4 mm
    Cable gland M 16 x 1.5, incl. strain relief, max inner dia. 10.4 mm

    Probe tube
    Poliamide (PA6) dia 20 mm, lenght 202.5 mm,
    with torsion protection

    Process connection
    by mounting plastic flange (including in the scoope of delivery)

    Protection type
    IP 65 (according to EN 60529)enclosure only

    Protection class
    III (according to EN 60730)

    Approval
    CE-conformity,
    electromagnetic compatibility according to EN 61326,
    EMC directive 2004/108/EC

/ Shop / Products / VCP / VCP QDT24 - Duct Air Quality (VOC) Transmitter

VCP QDT24 – Duct Air Quality (VOC) Transmitter

$441.00 ex GST

The Duct air quality transmitters QDT 24 series for the measurement of VOC’s (Volatile Organic Compounds)

Part Number: QDT
Delivery Timeframe: 4-5 weeks
Category: Products
Unit Price: $441.00

$441.00 ex GST

Add to quote loading

Product Resources

←
→

QDT24 Duct Air Quality (VOC) Transmitter Datasheet

You May Also Like

←
→

CS Instruments LD 450 - Leak detector

Call for pricing

VIEW PRODUCT

CS Instruments FA 500 - Dew point sensor…

Call for pricing

VIEW PRODUCT

CS Instruments DP 400 - Mobile Dew Point…

Call for pricing

VIEW PRODUCT

CS Instruments DS 400 - Flow Station for…

Call for pricing

VIEW PRODUCT

CS Instruments FA 510/515 - Dew point sensor…

Call for pricing

VIEW PRODUCT

CS Instruments DS 500 mobile - Chart Recorder

Call for pricing

VIEW PRODUCT

CS Instruments - Leak Reporter Cloud Solution

VIEW PRODUCT

CS Instruments LD 500/510 - Air and Gas…

Call for pricing

VIEW PRODUCT

CS Instruments - Leak Reporter V2 Software

Variable pricing

VIEW PRODUCT

Sauermann Si-TI3 - Infrared Thermometer

$190.00 ex GST

VIEW PRODUCT

Fast Delivery: Free for orders over $100

Secure Online Payments: Visa or Mastercard

Quick Links

  • Products
  • Repairs & Calibration
  • Resource Centre
  • Manufacturers
  • My account
  • About Us
  • Contact Us

HEAD OFFICE

1300 768 887
sales@onetemp.com.au

   

Sydney  |  Melbourne  |  Brisbane  |  Perth  |  Adelaide

Quality & Security Guaranteed

  • Shipping & Returns
  • Terms & Conditions
  • Privacy Policy

Copyright © 2025 OneTemp. All rights reserved.

Notifications