Continuous VOC Gas Detector: TVOC 2

The TVOC 2 is a powerful, fixed continuous VOC gas monitor that incorporates a selectable detection range of 0–10 ppm, 0–100 ppm or 0–1000 ppm and is optimized for application in manufacturing and process industries where VOCs are normally present.

With a 4-20 mA analog output, the fixed continuous VOC gas detector can be easily incorporated into a Distributed Control System (DCS) to manage high VOC levels in your working environment and enable early warnings if necessary.


The TVOC 2 fixed continuous VOC gas detector features ATEX approvals that facilitate the use of a 3 wire TVOC system in Zone 2 hazardous areas lacking safety barriers, while its ATEX and IECEx approvals enable the use of the TVOC 2 in Zone 1 hazardous areas with safety barriers.

The TVOC 2 fixed continuous VOC gas monitor is easy to install, service, and calibrate and includes a PID sensor that is accessible and changeable in just a few seconds – it does not require a hot work permit.

Other fixed gas detectors include Falco Diffused, Falco Pumped and Titan.

TVOC 2 - Fixed gas monitor

Video Credit: Ion Science

Ultimate Performance

  • PID independently verified as best performing on the market
  • Built-in humidity resistance with no reason to compensate
  • Anti-contamination design for prolonged field operation
  • Variable duty cycle extends run time 

Ultimate Safety

  • Precision results across all environmental conditions
  • Rugged and robust design for use in harsh environments
  • Large LCD display for easy-to-read readings
  • ATEX and IECEx approved

Ultimate Flexibility

  • Easy-to-use – minimal training required
  • Simple access PID sensor for fast, straightforward servicing
  • Streamlined calibration procedure
  • Easily integrated into a control system 

Technical Specification

Source: Ion Science

Specification Value
Approvals II 2G Ex ia IIC T4 Gb (-20 °C ≤ Ta ≤ +50 °C)
II 3G Ex nA IIC T4 (-40 °C ≤ Ta ≤ +50 °C)
IECEx BAS 06.0057X
Ingress Protection Designed to IP65
Sensor ingress protection IP54
Power 5 – 28 VDC Max 130 mA
Output 4-20 mA requires a 8-35 VDC power supply
For IS requirements 8-30 VDC power supply
Range 0 to 10 pp, 0 to 100, 0 to 1000 ppm (user selectable)
Sampling Diffusion (can be pumped if required using an adaptor)
Display 7 segment, 4 digit LCD, 4 colour LEDs
Response Sensor – T90 <5 secs
Accuracy 0 to 100 ppm: ±5% calibration point
100 to 1000 ppm: ±10% at calibration points
Calibration Accessed via magnetic switch
100 ppm isobutylene via calibration kit accessory
Temperature Operating: – 20 to 50 °C (- 4 to 122 °F)
Humidity: 0-95% RH (non-condensing)
Weight and Dimensions Instrument: 1.4 kg (3.1 lb) Packed: 1.6 kg (3.5 lb)
Dimensions: 188 x 126 x 78 mm (7.4 x 4.9 x 3″)
4 – 20 mA Alarm Levels Selectable 2 mA & 3.5 mA options


TVOC 2 Continuous VOC Gas Detector – Accessories and Replacement Parts

The TVOC 2 fixed continuous VOC gas monitor is compatible with a range of accessories and replacement parts; please contact ION for further information or to make an order. 

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