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TVOC Instrument

Product SKU: TVO

Quick Overview

Best available photoionisation (PID) detection

  • PID independently verified as best performing on the market

  • Range: 0 to 10, 0 to 100 or 0 to 1000 ppm from just one instrument

  • In-built humidity resistance with no need to compensate

  • Anti-contamination design for extended field operation

  • Variable duty cycle prolongs run time

  • Reliable diffusive monitoring – no pump required


  • Accurate results over all environmental conditions

  • Rugged and robust design withstands harsh environments

  • Large LCD display for clear readings

  • ATEX and IECEx approved

Ease of use

  • Simple to use – minimal training required

  • Easy access PID sensor for fast, simple servicing

  • Simple calibration procedure

  • Easily integrated into a control system

Low cost operation

  • Inexpensive consumables and parts

  • Two-year warranty when instrument registered online

Product Name SKU Price Qty
System+ Environmental Monitor with PSU + Lower Input glands TVESXBXX-X
TVOC Fixed PID Detector (ATEX Approved) TVOSXBMX-X

Availability: In stock


Total VOC Detector for Continuous Volatile Organic Compound Monitoring

TVOC is a fixed continuous VOC detector for the detection and measurement of total volatile organic compounds (VOCs). Its photoionisation detection (PID) capabilities utilise advanced patented Fence Electrode technology, a 3 electrode format with increased resistance to humidity and contamination.

A robust fixed VOC detector, TVOC has a selectable detection range of 0 – 10 ppm, 0 – 100 ppm or 0 – 1000 ppm and is ideal for use in manufacturing and process industries where VOCs are typically present.

With a 4-20 mA analogue output, the TVOC VOC detector can be simply integrated into a DCS control system to provide warnings and enable control of high VOC levels in the working environment.

ATEX approvals enable a 3 wire TVOC system to be used in Zone 2 hazardous areas, without safety barriers. ATEX and IECEx approvals allow TVOC to be used in Zone 1 hazardous areas, with safety barriers.

The TVOC fixed VOC detector utilises a diffusive sample technique resulting in less contamination issues compared to pumped systems, reducing lamp cleaning and servicing requirements. Simple to install service and calibrate, TVOC requires no hot work permit and the PID sensor is accessible and changeable in a matter of seconds.

The TVOC fixed VOC detector is also available for use with a pumped system for applications where sample conditioning is required.

TVOC is part of a range of VOC detectors that includes the hand held PhoCheck Tiger, PhoCheck+ and FirstCheck+ instruments.

TVOC is a registered trademark of Ion Science Ltd.

Additional Information

Sensor (PID) * 10.6 eV lamp with Ion Science patented Fence Electrode Technology
Hazardous Area Safety Approvals ATEX: II 3 G Ex nA IIC T4 (-40°C ≤Ta ≤ 50°C) ATEX / IECEx: II 2 G EEx ia IIC T4 (-20°C ≤Ta ≤ 50°C)
Ingress Protection Rating Designed to IP65 Dependent on cable glands fitted sensor to IP53
Power 4-20mA requires a 8-35VDC power supply For IS requirements 3-30 VDC power supply
Ranges 0 to 10 ppm, 0 to 100 ppm, 0 to 1000 ppm (user selectable)
Sampling Diffusion (can be pumped if required using an adaptor)
Display 7 segment, 5 digit LCD, 4 colour LED’s
Response ** Sensor – T90 <5 sec
Accuracy 0 to 100 ppm: ± 10% or ± 1 ppm (whichever is greater) 0 to 1000 ppm: ± 10% or ± 1 ppm (whichever is greater)
Linearity 0 to 1000 ppm: >75%
Calibration Magnetically accessed 100 ppm Isobutylene via calibration kit accessory
Temperature Operating: -20 to 50°C, -4 to 122°F Humidity: 0-95% RH (non condensing)
Weight & dimensions Instrument: 1.4 kg (3.1 lb) packed: 1.6 kg (3.5 ib) 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