1. Enviro Technology Services plc
Air Quality
Monitoring
ET digital Air Quality Systems and Networks are
the most advanced and flexible systems available.
Utilising Integrated Digital Technology (IDT),
data retrieval is redefined and the standard for
air quality monitoring systems reset.
Open-path AQM System
Designed with the user in mind, ET’s systems are compact, simple to operate,
easy to maintain and are guaranteed "future-proof".
A wide range of continuous gas, particulate and meteorological sensors is available
and both analysers and sensors can be used together as an integrated system or
as stand-alone units. Adding a new analyser is simple – just plug in to the digital
RS232 switch and make a quick change in the EnviMan software.
• Internationally approved analysers - US EPA, MCERTS, TÜV, TA Luft, CE, CEN
• Gas analysers available for SO , NO, NO , NO , CO, O , VOCs, Benzene, 1,3 Butadiene,
2 2 X 3
H2S, N2O, NH3 and others
• Dust analysers and samplers for PM10, PM2.5, TSP, heavy metals, nitrates/sulphates.
• Meteorological sensors for wind speed, wind direction, temperature, relative humidity, MCERTS Approved Gas Analysers
pressure, precipitation, solar radiation, etc
• Analyser integration using Integrated Digital Technology (IDT) – NEW
internal datalogging, digital data transfer and remote system operation
Data collection
• Flexible calibration options using traceable and certified calibration sources capability
• Communication using modem, GSM, GPRS, satellite and ethernet/broadband. via internet/
broadband
www.et.co.uk

2. Air Quality Monitoring
Open-path Monitoring Point Source Monitoring
Enviro Technology specialises in Enviro Technology has been a leader in the design
open-path, air quality monitoring and manufacture of air quality monitoring systems
systems based on Differential Optical since it was formed in 1983 and its analysers are to
Absorption Spectroscopy (DOAS). be found throughout the world in thousands of
DOAS systems are fully automatic, monitoring applications.
Open-path extremely flexible and, due to a The latest generation of analysers bring improved
Monitoring System
minimum of human intervention, cost-effective to performance, less drift and less temperature
run. Every minute, several thousand cubic metres coefficient as a result of the use of advanced
of air interact with a beam of light between a electronic, surface-mounted components and
light-source and a receiver to provide a more improved control algorithms. The number of
representative sample than can obtained with printed circuit boards has been halved and all cards
point sampling techniques. are interchangeable between machines leading to
One ET system will operate several light-paths easier and quicker card replacement. An extensive
continuously measuring multiple gases over paths of internal Data Acquisition System, utilising the
up to 1 km long. Any gas specified in the system’s analysers’ internal records, is capable of logging
software can be measured, providing a facility to multiple parameters to a total of 1 million records.
meet specific needs in a wide variety of applications. ET gas analysers are MCERTS and US EPA
ET systems are MCERTS, TÜV and US EPA approved.
approved. 100 UV Fluorescent Series
Combines the proven UV fluorescent principle
ET System 300 Multi-gas System with state-of-the-art microprocessor technology to
This high performance package is designed for provide accurate and dependable measurements of
urban, trend, fence-line, street canyon and model SO2, H2S, TRS, and sulphur compounds.
validation applications. The system is available in
three configurations – Basic (SO2, NO2 and O3), 200 Chemiluminescent Series
BTX (benzene, toluene and xylene) and Basic/BTX Provides the sensitivity, stability and ease of use
(combining all compounds). needed for ambient or continuous dilution
monitoring of NO-NO2-NOX, NH3 and O3.
300 IR Absorption Series
Measures low ranges of CO, CO2 and N2O by
comparing infrared energy absorbed by a sample
to that absorbed by a reference gas according to
Beer-Lambert law.
400 UV Absorption Series
Microprocessor-based with simple, multi-tasking,
menu-driven software, for single pass, single path
measurements of O3.
700 Mass Flow Calibrator Series
Combines highly accurate mass flow controllers
and compressed sources of standard gases to
provide calibration gases for multi-point span and
zero checks.
ET monitoring system using
point source analysers

3. Mercury Monitoring VOC/HC Monitoring
Continuous Ultra-Trace GC955 POPC/VOC/BTX Analyser
Mercury Analyser Measures ozone precursors in ambient air. Two
Continuous, simple and unattended operation separate sample and column systems are used to
providing precision analysis of total gaseous measure C2-C5 and C6-C10 fractions. Methane
mercury in ambient air with an update rate as low and non-methane compounds are measured
as 2.5 minutes and a detection limit of <0.1 ng/m3 separately without relying on the efficiency of a
(12 parts per quadrillion by volume). catalytic converter.
Continuous VOCHC analyser
Continuous mercury analyser
Services Meteorological
To complement the ET portfolio, EnviroService
include flexible, quality-assured, service and
Instrumentation
maintenance contracts managed by highly A full range of instrumentation and systems from
qualified and strategically located technicians leading manufacturers including solid state wind sensors,
and engineers. barometric pressure sensors, precipitation gauges,
The EnviroHire facility carries the largest air temperature sensors, solar sensors and AutoMet™ -
stock of environmental monitoring equipment a complete, digital meteorological monitoring system
in the UK or Europe offering a range of that provides instant access to weather information.
instruments and systems that will cover almost
any short- or long-term project.
Air Quality Software
• Automatic
data collection
• Statistical
analysis
• Airquality
forecasting
• Dispersion
modelling
• Internet
public display

4. Air Quality Monitoring
Integrated Digital Technology
Integrated Digital Technology completely removes the need to
Key features and
use expensive, low technology, analogue dataloggers. Data is user benefits
transmitted via telephone modem, GSM unit (cellular telephone
network), Internet or to a dedicated site PC as required. • Simple, inexpensive analyser
integration using Integrated
As each analyser is able to store up to 5 years data/diagnostic Digital Technology
information in internal memory and, by fully utilising the RS232 • Fully exploits analysers’fast,
RS232 capabilities i.e.
powerful
capabilities, many benefits can accrue to the user including:
bi-directional communication
• Full remote control of system via modem/GSM unit or digital data transfer
Internet allowing health checks and calibration routines • Full remoteGSM unit allowingvia
modem or
control of system
from the office
remote calibration checks, etc
• Data collection of user defined averages plus span,
• Flexible and expandable systems
zero and diagnostic data
• Compatible with EnviMan software
• Remote control and calibration activation of individual • Internationally approved analysers
analyser set-up (i.e. time, range, etc).
• Span/zero data collection and graphing • Flexible calibrationzero and span
including internal
options
(IZS)
• Fast, remote troubleshooting by ET Technical
Support Engineers. • Up most years parts warranty
on
to 5
analysers
Flexible calibration options • Choice of ET service contracts
Unlike some suppliers, we can offer a choice of automatic or
manual calibration systems to meet a client’s exact requirements.
• Simple operation and maintenance.
Low running costs
Choose from a range of systems including permeation tubes,
certified gas cylinders and dynamic dilution calibrators.
• EnviroHire equipment rental
facilities available
SM 200 combined dust
monitor/sampler
Monitoring
for Life
EnviroTechnology Services plc
Advanced Environmental Systems - Sales, Hire and Services
Kingfisher Business Park, London Road, Stroud, Gloucestershire, GL5 2BY
Tel: +44 (0)1453 733200 Fax: +44 (0)1453 733201 Email: info@et.co.uk
www.et.co.uk