Portable Toxic Gas Detector – VOC-TRAQ® II Flow Cell

Direct Sample Connection from Targeted Area Allows for Remote VOC Monitoring

The MOCON - Baseline VOC-TRAQ® II Flow Cell integrates the VOC-TRAQ® II with a flow-through housing, allowing total volatile organic compound (TVOC) measurement with an outlet and inlet flow path for remote sample delivery. This unit enables controlled sample delivery when it is used in conjunction with a pump or pressurized source.

The VOC-TRAQ II Flow Cell provides the potential to remotely monitor and then record the existence of total volatile organic compounds by using a PC with Windows-based OS software. The piD-TECH® eVx photoionization detector provides the acute sensitivity of this device.

The dynamic range of this instrument is 0 ppm to 10,000 ppm with minimum detectable quantities (MDQs) of 0.5 ppb to 1,500 ppb based on piD-TECH eVx sensor selection.

The VOC-TRAQ software is well-matched with Windows®-based PC’s or in a stand-alone mode employing an external USB power supply. Internal memory enables it to store up to 36,000 sample readings at user selectable time intervals. The software includes programmable alarm levels with graduated audible signal that is considered to be proportional to the VOC concentration detected. Concentration alarms are displayed by a three-color LED.

The included VOC-TRAQ II PC software brings about an easy calibration routine, setup parameters as well as a graphical display of data.

The VOC-TRAQ II Flow Cell has been designed for easy usage by an air quality consultant, maintenance manager, safety engineer or an individual concerned about TVOCs in the indoor environment.


  • Cleanrooms
  • Public places
  • Leak detection
  • Educational facilities
  • Work environments
  • Research and development

Features and Benefits

  • Compact design
  • Reliable and accurate
  • Easy to use
  • PID based for maximum sensitivity
  • Wide range of VOC detection capabilities
  • Simple setup and calibration
  • Programmable alarm levels with LED and/or audible alarm indication
  • USB powered/rechargeable power supply
  • PC with Windows® OS compatible
  • Stores up to 36,000 sample readings

VOC-TRAQ II Flow Cell software

Screen Shot from VOC-TRAQ II Flow Cell software depicting dynamic data display.


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Gases Monitored Volatile Organic Compounds (VOC’s) w/ ionization potentials (IP) of < 10.6 eV
Contact MOCON-Baseline for complete ionization potential list
Sensor User replaceable MOCON-Baseline piD-TECH eVx shielded photoionization detector
Lamp Energy 10.6 eV or 10.0 eV
Sensor Ranges & MDQs (Isobutylene)
10.6 eV Green Purple Red Yellow Blue
Part Number 043-734 043-735 043-736 043-737 043-738
Range* 10,000 ppm 2,000 ppm 200 ppm 20 ppm 2 ppm
MDQ* 500 ppb 100 ppb 10 ppb 1.5 ppb 0.5 ppb


10.0 eV Purple Red Yellow
Part Number 043-739 043-740 043-741
Range* 6,000 ppm 600 ppm 60 ppm
MDQ* 500 ppb 50 ppb 5 ppb

* Ranges are from ambient air measurements.
Minimum Detectable Quantity (MDQ) is based on a 3:1 signal to noise ratio.

Operating Temperature -4 to 104 °F (-20 to 40 °C)
Operating Humidity Range 0–90 % relative humidity, non-condensing
Humidity Response ≤ 1% @ 90% relative humidity
Humidity Quenching Effect < 15% @ 90% relative humidity
Response Time T90: < 10 seconds (dry isobutylene response)
Accuracy ± 3% of reading, with constant temperature and pressure
Internal Memory 2 Mb EEPROM memory stores up to 36,000 readings
Sample Frequency Interval Programmable, user selectable sample interval frequency from 0.1 sec
Output USB
Power USB 5 VDC power for operation [PC, wall connected USB power supply (5.0 V DC, 40 mA) , or optional battery pack]
Calibration Software controlled
Computer Requirements Microsoft® Windows® 10 / 8 / 7 / Vista™ PC or equivalent via USB, 2.0 or greater
Dimensions 1.4” diam. x 5.8” L
(3.56 cm diam. x 14.73 cm L)
Weight 5.0 oz (141.75 g)
Warranty Period 18 months
Inlet / Outlet Ports 1/4 - 28 UNF sample inlet/outlet ports.
Supplied with Cheminert® flangless nuts & collapsible ferrule (1/16" OD)
Inlet Pressure 0 to 60 psig
Inlet Flow 0 to 300 cc/min

Included Accessories

  • VOC-TRAQ® II PC software
  • USB cable, 2.0 to mini-B

Optional Accessories

  • P/N 043-189 Carrying case
  • P/N 043-136 Calibration cap w/tube
  • P/N 043-126 Device stand
  • P/N 043-271 piD-TECH eVx maintenance kit
  • P/N 043-131 Battery pack, rechargeable, 24 hrs
  • P/N 042-246 piD-TECH eVx Lamp cleaning kit

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